Adjust UILabel height depending on the text

Question

Consider I have the following text in a UILabel  a long line of dynamic text       Since the alien army vastly outnumbers the team  players must use the post-apocalyptic world to their advantage  such as seeking cover behind dumpsters  pillars  cars  rubble  and other objects     I want to resize the UILabel s height so that the text can fit in  I m using following properties of UILabel to make the text within to wrap   myUILabel lineBreakMode   UILineBreakModeWordWrap  myUILabel numberOfLines   0    Please let me know if I m not heading in the right direction  Thanks

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Swift 2       yourLabel text    your very long text      yourLabel numberOfLines   0     yourLabel lineBreakMode   NSLineBreakMode ByWordWrapping     yourLabel frame size width   200     yourLabel frame size height   CGFloat MAXFLOAT      yourLabel sizeToFit     The interesting lines are sizeToFit   in conjunction with setting a frame size height to the max float  this will give room for long text  but sizeToFit   will force it to only use the necessary  but ALWAYS call it after setting the  frame size height    I recommend setting a  backgroundColor for debug purposes  this way you can see the frame being rendered for each case

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In iOS 6 Apple has added a property to UILabel that greatly simplifies dynamic vertical resizing of labels  preferredMaxLayoutWidth  Using this property in combination with lineBreakMode   NSLineBreakByWordWrapping and sizeToFit method allows easily resize a UILabel instance to the height that accommodates the entire text  A quote from iOS documentation   preferredMaxLayoutWidth The preferred maximum width  in points  for a multiline label   Discussion This property affects the size of the label when layout constraints are applied to it  During layout  if the text extends beyond the width specified by this property  the additional text is flowed to one or more new lines  thereby increasing the height of the label   A sample      UILabel  status     UILabel alloc  init   status lineBreakMode   NSLineBreakByWordWrapping  status numberOfLines   5     limits to 5 lines  use 0 for unlimited    self addSubview status      self here is the parent view  status preferredMaxLayoutWidth   self frame size width     assumes the parent view has its frame already set   status text     quot Some quite lengthy message may go here    quot    status sizeToFit    status setNeedsDisplay

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Since sizeWithFont is deprecated I use this one instead   this one get label specific attributes   - CGFloat heightForLabel  UILabel   label withText  NSString   text       NSAttributedString  attributedText     NSAttributedString alloc  initWithString text attributes   NSFontAttributeName label font        CGRect rect    attributedText boundingRectWithSize  CGSize  label frame size width  CGFLOAT MAX                                             options NSStringDrawingUsesLineFragmentOrigin                                            context nil        return ceil rect size height

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Here is a category version   UILabel AutoSize h      import    interface UILabel  AutoSize   -  void  autosizeForWidth   int  width    end   UILabel AutoSize m   import  UILabel AutoSize h    implementation UILabel  AutoSize   -  void  autosizeForWidth   int  width       self lineBreakMode   UILineBreakModeWordWrap      self numberOfLines   0      CGSize maximumLabelSize   CGSizeMake width  FLT MAX       CGSize expectedLabelSize    self text sizeWithFont self font constrainedToSize maximumLabelSize lineBreakMode self lineBreakMode       CGRect newFrame   self frame      newFrame size height   expectedLabelSize height      self frame   newFrame      end

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Instead doing this programmatically  you can do this in Storyboard XIB while designing    Set UIlabel s number of lines property to 0 in attribute inspector  Then set width constraint  or  leading and trailing constraint as per the requirement  Then set height constraint with minimum value  Finally select the height constraint you added and in the size inspector the one next to attribute inspector  change the height constraint s relation from equal to - greater than

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UILabel  itemTitle     UILabel alloc  initWithFrame CGRectMake 10 0f  10 100  200 0f    itemTitle text     aseruy56uiytitfesh   itemTitle adjustsFontSizeToFitWidth   NO  itemTitle autoresizingMask   UIViewAutoresizingFlexibleWidth  itemTitle font    UIFont boldSystemFontOfSize 18 0   itemTitle textColor    UIColor blackColor   itemTitle shadowColor    UIColor whiteColor   itemTitle shadowOffset   CGSizeMake 0  1   itemTitle backgroundColor    UIColor blueColor   itemTitle lineBreakMode   UILineBreakModeWordWrap  itemTitle numberOfLines   0   itemTitle sizeToFit    self view addSubview itemTitle     use this here all the properties are used on the label and test it by increasing the text in the itemTitle text as  itemTitle text     diofgorigjveghnhkvjteinughntivugenvitugnvkejrfgnvkhv     it will show the perfetc answer as you need

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Thanks guys for help  here is the code I tried which is working for me     UILabel  instructions     UILabel alloc initWithFrame CGRectMake 10  225  300  180       NSString  text     First take clear picture and then try to zoom in to fit the       instructions text   text     instructions textAlignment   UITextAlignmentCenter     instructions lineBreakMode   NSLineBreakByWordWrapping      instructions setTextColor  UIColor grayColor        CGSize expectedLabelSize    text sizeWithFont instructions font                                  constrainedToSize instructions frame size                                     lineBreakMode UILineBreakModeWordWrap        CGRect newFrame   instructions frame      newFrame size height   expectedLabelSize height      instructions frame   newFrame      instructions numberOfLines   0       instructions sizeToFit        self addSubview instructions

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Check this work perfectly without adding Single line of code   Using Autolayout   I made a demo for you according to your requirement  Download it from below link   Autoresize UIView and UILabel  Step by Step Guide  -  Step 1  - Set constrain to UIView   1  Leading 2  Top 3  Trailing  From mainview     Step 2  - Set constrain to Label 1  1  Leading 2  Top 3  Trailing  From it s superview     Step 3  - Set constrain to Label 2  1  Leading 2  Trailing  From it s superview     Step 4  - Most tricky give botton to UILabel from UIView      Step 5  -  Optional  Set constrain to UIButton  1  Leading 2  Bottom 3  Trailing 4  Fixed Height  From mainview     Output  -    Note  - Make sure you have set Number of lines  0 in Label property     I hope this info enough to understand Autoresize UIView according to UILabel s height and Autoresize UILabel According to text

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Thanks for this post  It helped me a great deal  In my case I am also editing the text in a separate view controller  I noticed that when I use    cell contentView addSubview cellLabel     in the tableView cellForRowAtIndexPath  method that the label view was continually rendered over the top of the previous view each time I edited the cell  The text became pixelated  and when something was deleted or changed  the previous version was visible under the new version  Here s how I solved the problem   if    cell contentView subviews  count   gt  0        UIView  test     cell contentView subviews  objectAtIndex 0        test removeFromSuperview      cell contentView insertSubview cellLabel atIndex 0     No more weird layering  If there is a better way to handle this  Please let me know

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myLabel text    your very long text  myLabel numberOfLines   0 myLabel lineBreakMode   NSLineBreakMode ByWordWrapping   Please set constraints for UILable in storyboard including top left bottom right

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One line is Chris s answer is wrong   newFrame size height   maximumLabelSize height    should be  newFrame size height   expectedLabelSize height    Other than that  it s the correct solution

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Adding to the above answers   This can be easily achieved via storyboard    Set constraint for UILabel  In my case I did top  left and fixed width  Set Number of line to 0 in Attribute Inspector Set Line Break to WordWrap in Attribute Inspector

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Problem is that none of mentioned functions is realiable and for some string and font will return incorrect height value  Especially will fail for attributed texts   The only realiable solution is here  https   stackoverflow com a 4214978 699944 and the point is to use CoreText to manually calculate height of every line to get right size  There is no other known way to do this

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This is one line of code to get the UILabel Height using Objective-c   labelObj numberOfLines   0  CGSize neededSize    labelObj sizeThatFits CGSizeMake screenWidth  CGFLOAT MAX      and using  height you will get the height of label as follows   neededSize height

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You may use it as a method  as well    Pyjamasam is very much true so i am just making its method   It may be helpfull for some one else  - CGRect setDynamicHeightForLabel  UILabel   lbl andMaxWidth  float  width      CGSize maximumLabelSize   CGSizeMake  width  FLT MAX        CGSize expectedLabelSize     lbl text sizeWithFont  lbl font constrainedToSize maximumLabelSize lineBreakMode  lbl lineBreakMode          adjust the label the the new height      CGRect newFrame    lbl frame      newFrame size height   expectedLabelSize height      return newFrame      and just set it like this  label frame    self setDynamicHeightForLabel label andMaxWidth 300 0

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This is one line of code to get the UILabel Height using Objective-c   labelObj numberOfLines   0  CGSize neededSize    labelObj sizeThatFits CGSizeMake screenWidth  CGFLOAT MAX      and using  height you will get the height of label as follows   neededSize height

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myLabel text    your very long text  myLabel numberOfLines   0 myLabel lineBreakMode   NSLineBreakMode ByWordWrapping   Please set constraints for UILable in storyboard including top left bottom right

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Problem is that none of mentioned functions is realiable and for some string and font will return incorrect height value  Especially will fail for attributed texts   The only realiable solution is here  https   stackoverflow com a 4214978 699944 and the point is to use CoreText to manually calculate height of every line to get right size  There is no other known way to do this

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You can get height using below code  You have to pass   text 2  font 3  label width  func heightForLabel text  String  font  UIFont  width  CGFloat  - gt  CGFloat       let label UILabel   UILabel frame  CGRect x  0  y  0  width  width  height  CGFloat greatestFiniteMagnitude      label numberOfLines   0    label lineBreakMode   NSLineBreakMode byWordWrapping    label font   font    label text   text    label sizeToFit       return label frame height

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sizeWithFont constrainedToSize lineBreakMode  is the method to use  An example of how to use it is below     Calculate the expected size based on the font and linebreak mode of your label    FLT MAX here simply means no constraint in height CGSize maximumLabelSize   CGSizeMake 296  FLT MAX    CGSize expectedLabelSize    yourString sizeWithFont yourLabel font constrainedToSize maximumLabelSize lineBreakMode yourLabel lineBreakMode         adjust the label the the new height  CGRect newFrame   yourLabel frame  newFrame size height   expectedLabelSize height  yourLabel frame   newFrame

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You can implement TableViewController s  UITableViewCell   tableView cellForRowAtIndexPath   method in the following way  for example      define CELL LABEL TAG 1  -  UITableViewCell   tableView  UITableView   tableView  cellForRowAtIndexPath  NSIndexPath   indexPath       NSString  text     my long text        static NSString  MyIdentifier     MyIdentifier       UITableViewCell  cell    tableView dequeueReusableCellWithIdentifier MyIdentifier       if  cell    nil            cell      UITableViewCell alloc  initWithFrame CGRectZero  reuseIdentifier identifier  autorelease              CGFloat width    UIScreen mainScreen  bounds size width - 50      CGFloat height    self textHeight text    10      CGRect frame   CGRectMake 10 0f  10 0f  width  height        UILabel  cellLabel     UILabel alloc  initWithFrame frame       cellLabel tag   CELL LABEL TAG      cellLabel textColor    UIColor blackColor       cellLabel backgroundColor    UIColor clearColor       cellLabel textAlignment   UITextAlignmentLeft      cellLabel font    UIFont systemFontOfSize 12 0f        cell contentView addSubview cellLabel        cellLabel release        return cell     UILabel  label    UILabel    cell viewWithTag CELL LABEL TAG   label text   text  label numberOfLines   0   label sizeToFit   return cell    Also use NSString s sizeWithFont constrainedToSize lineBreakMode  method to compute the text s height

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UILabel extension based on this answer for Swift 4 and above  extension UILabel        func retrieveTextHeight    - gt  CGFloat           let attributedText   NSAttributedString string  self text   attributes   NSFontAttributeName self font            let rect   attributedText boundingRect with  CGSize width  self frame size width  height  CGFloat greatestFiniteMagnitude   options   usesLineFragmentOrigin  context  nil           return ceil rect size height             Can be used like   self labelHeightConstraint constant   self label retrieveTextHeight

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Updated Method     CGFloat heightForText  NSString  text font  UIFont  font withinWidth  CGFloat width        CGSize constraint   CGSizeMake width  20000 0f       CGSize size       CGSize boundingBox    text boundingRectWithSize constraint                                                   options NSStringDrawingUsesLineFragmentOrigin                                                attributes   NSFontAttributeName font                                                    context nil  size       size   CGSizeMake ceil boundingBox width   ceil boundingBox height         return size height

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Thanks for this post  It helped me a great deal  In my case I am also editing the text in a separate view controller  I noticed that when I use    cell contentView addSubview cellLabel     in the tableView cellForRowAtIndexPath  method that the label view was continually rendered over the top of the previous view each time I edited the cell  The text became pixelated  and when something was deleted or changed  the previous version was visible under the new version  Here s how I solved the problem   if    cell contentView subviews  count   gt  0        UIView  test     cell contentView subviews  objectAtIndex 0        test removeFromSuperview      cell contentView insertSubview cellLabel atIndex 0     No more weird layering  If there is a better way to handle this  Please let me know

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The easiest and better way that worked for me was to apply height constraint to label and set the priority to low  i e    250  in storyboard   So you need not worry about calculating the height and width programmatically  thanks to storyboard

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My code    UILabel  label          UILabel alloc  init   label numberOfLines   0  label lineBreakMode   NSLineBreakByWordWrapping  label text            text  label textAlignment   NSTextAlignmentCenter  label font             UIFont fontWithName  bodyTextFontFamily size  bodyFontSize    CGSize size    label sizeThatFits CGSizeMake width  MAXFLOAT      float height          size height  label frame           CGRectMake x  y  width  height

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To do this in Swift3 following is the code    let labelSizeWithFixedWith   CGSize width  300  height  CGFloat greatestFiniteMagnitude              let exactLabelsize   self label sizeThatFits labelSizeWithFixedWith              self label frame   CGRect origin  CGPoint x  20  y  20   size  exactLabelsize

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You can implement TableViewController s  UITableViewCell   tableView cellForRowAtIndexPath   method in the following way  for example      define CELL LABEL TAG 1  -  UITableViewCell   tableView  UITableView   tableView  cellForRowAtIndexPath  NSIndexPath   indexPath       NSString  text     my long text        static NSString  MyIdentifier     MyIdentifier       UITableViewCell  cell    tableView dequeueReusableCellWithIdentifier MyIdentifier       if  cell    nil            cell      UITableViewCell alloc  initWithFrame CGRectZero  reuseIdentifier identifier  autorelease              CGFloat width    UIScreen mainScreen  bounds size width - 50      CGFloat height    self textHeight text    10      CGRect frame   CGRectMake 10 0f  10 0f  width  height        UILabel  cellLabel     UILabel alloc  initWithFrame frame       cellLabel tag   CELL LABEL TAG      cellLabel textColor    UIColor blackColor       cellLabel backgroundColor    UIColor clearColor       cellLabel textAlignment   UITextAlignmentLeft      cellLabel font    UIFont systemFontOfSize 12 0f        cell contentView addSubview cellLabel        cellLabel release        return cell     UILabel  label    UILabel    cell viewWithTag CELL LABEL TAG   label text   text  label numberOfLines   0   label sizeToFit   return cell    Also use NSString s sizeWithFont constrainedToSize lineBreakMode  method to compute the text s height

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Swift 2       yourLabel text    your very long text      yourLabel numberOfLines   0     yourLabel lineBreakMode   NSLineBreakMode ByWordWrapping     yourLabel frame size width   200     yourLabel frame size height   CGFloat MAXFLOAT      yourLabel sizeToFit     The interesting lines are sizeToFit   in conjunction with setting a frame size height to the max float  this will give room for long text  but sizeToFit   will force it to only use the necessary  but ALWAYS call it after setting the  frame size height    I recommend setting a  backgroundColor for debug purposes  this way you can see the frame being rendered for each case

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When autoLayout is enabled the resizing doesn t work

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You may use it as a method  as well    Pyjamasam is very much true so i am just making its method   It may be helpfull for some one else  - CGRect setDynamicHeightForLabel  UILabel   lbl andMaxWidth  float  width      CGSize maximumLabelSize   CGSizeMake  width  FLT MAX        CGSize expectedLabelSize     lbl text sizeWithFont  lbl font constrainedToSize maximumLabelSize lineBreakMode  lbl lineBreakMode          adjust the label the the new height      CGRect newFrame    lbl frame      newFrame size height   expectedLabelSize height      return newFrame      and just set it like this  label frame    self setDynamicHeightForLabel label andMaxWidth 300 0

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sizeWithFont constrainedToSize lineBreakMode  is the method to use  An example of how to use it is below     Calculate the expected size based on the font and linebreak mode of your label    FLT MAX here simply means no constraint in height CGSize maximumLabelSize   CGSizeMake 296  FLT MAX    CGSize expectedLabelSize    yourString sizeWithFont yourLabel font constrainedToSize maximumLabelSize lineBreakMode yourLabel lineBreakMode         adjust the label the the new height  CGRect newFrame   yourLabel frame  newFrame size height   expectedLabelSize height  yourLabel frame   newFrame

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Updated Method     CGFloat heightForText  NSString  text font  UIFont  font withinWidth  CGFloat width        CGSize constraint   CGSizeMake width  20000 0f       CGSize size       CGSize boundingBox    text boundingRectWithSize constraint                                                   options NSStringDrawingUsesLineFragmentOrigin                                                attributes   NSFontAttributeName font                                                    context nil  size       size   CGSizeMake ceil boundingBox width   ceil boundingBox height         return size height

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In iOS 6 Apple has added a property to UILabel that greatly simplifies dynamic vertical resizing of labels  preferredMaxLayoutWidth  Using this property in combination with lineBreakMode   NSLineBreakByWordWrapping and sizeToFit method allows easily resize a UILabel instance to the height that accommodates the entire text  A quote from iOS documentation   preferredMaxLayoutWidth The preferred maximum width  in points  for a multiline label   Discussion This property affects the size of the label when layout constraints are applied to it  During layout  if the text extends beyond the width specified by this property  the additional text is flowed to one or more new lines  thereby increasing the height of the label   A sample      UILabel  status     UILabel alloc  init   status lineBreakMode   NSLineBreakByWordWrapping  status numberOfLines   5     limits to 5 lines  use 0 for unlimited    self addSubview status      self here is the parent view  status preferredMaxLayoutWidth   self frame size width     assumes the parent view has its frame already set   status text     quot Some quite lengthy message may go here    quot    status sizeToFit    status setNeedsDisplay

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NSString  str     Please enter your text         CGSize lblSize    str sizeWithFont  UIFont systemFontOfSize 15  constrainedToSize  CGSizeMake 200 0f  600 0f  lineBreakMode  NSLineBreakByWordWrapping    UILabel  label     UILabel alloc init   label frame   CGRectMake 60  20  200  lblSize height   label numberOfLines   0  label lineBreakMode   NSLineBreakByWordWrapping  label font    UIFont systemFontOfSize 15   label text   str  label backgroundColor    UIColor clearColor    label sizeToFit    self view addSubview label

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My approach to compute the dynamic height of UILabel       let width          lt  width of this label      let text          lt  display content      label numberOfLines   0     label lineBreakMode    byWordWrapping     label preferredMaxLayoutWidth   width         Font of this label        label font   UIFont systemFont ofSize  17 0         Compute intrinsicContentSize based on font  and preferredMaxLayoutWidth     label invalidateIntrinsicContentSize           Destination height     let height   label intrinsicContentSize height   Wrap to function   func computeHeight text  String  width  CGFloat  - gt  CGFloat          A dummy label in order to compute dynamic height      let label   UILabel        label numberOfLines   0     label lineBreakMode    byWordWrapping     label font   UIFont systemFont ofSize  17 0       label preferredMaxLayoutWidth   width     label text   text     label invalidateIntrinsicContentSize        let height   label intrinsicContentSize height     return height

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You were going in the right direction  All you need to do is   myUILabel numberOfLines   0  myUILabel text     Enter large amount of text here    myUILabel sizeToFit

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This method will give perfect  height   - float  getHeightForText  NSString   text withFont  UIFont   font andWidth  float  width  CGSize constraint   CGSizeMake width   20000 0f   CGSize title size  float totalHeight    title size    text boundingRectWithSize constraint                                 options NSStringDrawingUsesLineFragmentOrigin                              attributes    NSFontAttributeName   font                                   context nil  size   totalHeight   ceil title size height    CGFloat height   MAX totalHeight  40 0f   return height

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- UITableViewCell   tableView  UITableView   tableView cellForRowAtIndexPath  NSIndexPath   indexPath       cellIdentifier     myCell       cell    tableView dequeueReusableCellWithIdentifier cellIdentifier       cell myUILabel lineBreakMode   UILineBreakModeWordWrap              cell myUILabel numberOfLines   0      cell myUILabel text     Some very very very very long text            cell myUILabel criterionDescriptionLabel sizeToFit          -  CGFloat tableView  UITableView   tableView heightForRowAtIndexPath  NSIndexPath   indexPath       UITableViewCell  cell    self tableView tableView cellForRowAtIndexPath indexPath       CGFloat rowHeight   cell myUILabel frame size height   10       return rowHeight

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Here is a category version   UILabel AutoSize h      import    interface UILabel  AutoSize   -  void  autosizeForWidth   int  width    end   UILabel AutoSize m   import  UILabel AutoSize h    implementation UILabel  AutoSize   -  void  autosizeForWidth   int  width       self lineBreakMode   UILineBreakModeWordWrap      self numberOfLines   0      CGSize maximumLabelSize   CGSizeMake width  FLT MAX       CGSize expectedLabelSize    self text sizeWithFont self font constrainedToSize maximumLabelSize lineBreakMode self lineBreakMode       CGRect newFrame   self frame      newFrame size height   expectedLabelSize height      self frame   newFrame      end

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- UITableViewCell   tableView  UITableView   tableView cellForRowAtIndexPath  NSIndexPath   indexPath       cellIdentifier     myCell       cell    tableView dequeueReusableCellWithIdentifier cellIdentifier       cell myUILabel lineBreakMode   UILineBreakModeWordWrap              cell myUILabel numberOfLines   0      cell myUILabel text     Some very very very very long text            cell myUILabel criterionDescriptionLabel sizeToFit          -  CGFloat tableView  UITableView   tableView heightForRowAtIndexPath  NSIndexPath   indexPath       UITableViewCell  cell    self tableView tableView cellForRowAtIndexPath indexPath       CGFloat rowHeight   cell myUILabel frame size height   10       return rowHeight

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Instead doing this programmatically  you can do this in Storyboard XIB while designing    Set UIlabel s number of lines property to 0 in attribute inspector  Then set width constraint  or  leading and trailing constraint as per the requirement  Then set height constraint with minimum value  Finally select the height constraint you added and in the size inspector the one next to attribute inspector  change the height constraint s relation from equal to - greater than

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Updates according iOS7     If description are available for protocol protocolDescriptionLabel text    dataDictionary objectForKey   description     protocolDescriptionLabel sizeToFit    protocolDescriptionLabel setLineBreakMode NSLineBreakByWordWrapping    CGSize expectedLabelSize    protocolDescriptionLabel                textRectForBounds protocolDescriptionLabel frame                limitedToNumberOfLines protocolDescriptionLabel numberOfLines  size  NSLog   expectedLabelSize  f   expectedLabelSize height      adjust the label the the new height  CGRect newFrame   protocolDescriptionLabel frame  newFrame size height   expectedLabelSize height  protocolDescriptionLabel frame   newFrame

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Solution to iOS7 prior and iOS7 above         UILabel DynamicHeight m     For StackOverFlow        Created by Vijay on 24 02 14      Copyright  c  2014 http   Vijay-Apple-Dev blogspot com  All rights reserved       import  lt UIKit UIKit h gt    define SYSTEM VERSION GREATER THAN OR EQUAL TO v       UIDevice currentDevice  systemVersion  compare v options NSNumericSearch     NSOrderedAscending    define SYSTEM VERSION LESS THAN v                      UIDevice currentDevice  systemVersion  compare v options NSNumericSearch     NSOrderedAscending    define iOS7 0   7 0    interface UILabel  DynamicHeight                                                                                Calculate the size bounds frame of the Multi line Label                                                                                      Returns the size of the Label         param aLabel To be used to calculte the height         return size of the Label      - CGSize sizeOfMultiLineLabel    end          UILabel DynamicHeight m     For StackOverFlow        Created by Vijay on 24 02 14      Copyright  c  2014 http   Vijay-Apple-Dev blogspot com  All rights reserved       import  UILabel DynamicHeight h    implementation UILabel  DynamicHeight                                                                               Calculate the size bounds frame of the Multi line Label                                                                                      Returns the size of the Label         param aLabel To be used to calculte the height         return size of the Label     - CGSize sizeOfMultiLineLabel       NSAssert self    UILabel was nil           Label text     NSString  aLabelTextString    self text          Label font     UIFont  aLabelFont    self font          Width of the Label     CGFloat aLabelSizeWidth   self frame size width        if  SYSTEM VERSION LESS THAN iOS7 0               version  lt  7 0          return  aLabelTextString sizeWithFont aLabelFont                             constrainedToSize CGSizeMake aLabelSizeWidth  MAXFLOAT                                  lineBreakMode NSLineBreakByWordWrapping             else if  SYSTEM VERSION GREATER THAN OR EQUAL TO iOS7 0               version  gt   7 0            Return the calculated size of the Label         return  aLabelTextString boundingRectWithSize CGSizeMake aLabelSizeWidth  MAXFLOAT                                                options NSStringDrawingUsesLineFragmentOrigin                                            attributes                                                            NSFontAttributeName   aLabelFont                                                                                                         context nil  size              return  self bounds  size       end

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This method will work for both iOS 6 and 7  -  float heightForLabelSize  CGSize maximumLabelSize  Font  UIFont   font String  NSString  string    if     UIDevice currentDevice  systemVersion  floatValue   gt   7        NSDictionary  stringAttributes    NSDictionary dictionaryWithObject font forKey  NSFontAttributeName        CGSize adjustedLabelSize    string maximumLabelSize                                                                   options NSStringDrawingTruncatesLastVisibleLine NSStringDrawingUsesLineFragmentOrigin                                                                attributes stringAttributes context nil  size      return adjustedLabelSize height    else       CGSize adjustedLabelSize    string sizeWithFont font constrainedToSize maximumLabelSize lineBreakMode NSLineBreakByWordWrapping        return adjustedLabelSize height

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This method will work for both iOS 6 and 7  -  float heightForLabelSize  CGSize maximumLabelSize  Font  UIFont   font String  NSString  string    if     UIDevice currentDevice  systemVersion  floatValue   gt   7        NSDictionary  stringAttributes    NSDictionary dictionaryWithObject font forKey  NSFontAttributeName        CGSize adjustedLabelSize    string maximumLabelSize                                                                   options NSStringDrawingTruncatesLastVisibleLine NSStringDrawingUsesLineFragmentOrigin                                                                attributes stringAttributes context nil  size      return adjustedLabelSize height    else       CGSize adjustedLabelSize    string sizeWithFont font constrainedToSize maximumLabelSize lineBreakMode NSLineBreakByWordWrapping        return adjustedLabelSize height

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Since sizeWithFont is deprecated I use this one instead   this one get label specific attributes   - CGFloat heightForLabel  UILabel   label withText  NSString   text       NSAttributedString  attributedText     NSAttributedString alloc  initWithString text attributes   NSFontAttributeName label font        CGRect rect    attributedText boundingRectWithSize  CGSize  label frame size width  CGFLOAT MAX                                             options NSStringDrawingUsesLineFragmentOrigin                                            context nil        return ceil rect size height

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The easiest and better way that worked for me was to apply height constraint to label and set the priority to low  i e    250  in storyboard   So you need not worry about calculating the height and width programmatically  thanks to storyboard

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UILabel  itemTitle     UILabel alloc  initWithFrame CGRectMake 10 0f  10 100  200 0f    itemTitle text     aseruy56uiytitfesh   itemTitle adjustsFontSizeToFitWidth   NO  itemTitle autoresizingMask   UIViewAutoresizingFlexibleWidth  itemTitle font    UIFont boldSystemFontOfSize 18 0   itemTitle textColor    UIColor blackColor   itemTitle shadowColor    UIColor whiteColor   itemTitle shadowOffset   CGSizeMake 0  1   itemTitle backgroundColor    UIColor blueColor   itemTitle lineBreakMode   UILineBreakModeWordWrap  itemTitle numberOfLines   0   itemTitle sizeToFit    self view addSubview itemTitle     use this here all the properties are used on the label and test it by increasing the text in the itemTitle text as  itemTitle text     diofgorigjveghnhkvjteinughntivugenvitugnvkejrfgnvkhv     it will show the perfetc answer as you need

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You were going in the right direction  All you need to do is   myUILabel numberOfLines   0  myUILabel text     Enter large amount of text here    myUILabel sizeToFit

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Finally  it worked  Thank you guys   I was not getting it to work because i was trying to resize the label in heightForRowAtIndexPath method   -  CGFloat tableView  UITableView   tableView heightForRowAtIndexPath  NSIndexPath   indexPath   and  yeah silly me   i was resizing the label to default in cellForRowAtIndexPath method - i was overlooking the code i had written earlier    -  UITableViewCell   tableView  UITableView   tableView cellForRowAtIndexPath  NSIndexPath   indexPath

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When autoLayout is enabled the resizing doesn t work

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Finally  it worked  Thank you guys   I was not getting it to work because i was trying to resize the label in heightForRowAtIndexPath method   -  CGFloat tableView  UITableView   tableView heightForRowAtIndexPath  NSIndexPath   indexPath   and  yeah silly me   i was resizing the label to default in cellForRowAtIndexPath method - i was overlooking the code i had written earlier    -  UITableViewCell   tableView  UITableView   tableView cellForRowAtIndexPath  NSIndexPath   indexPath

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Finally  it worked  Thank you guys   I was not getting it to work because i was trying to resize the label in heightForRowAtIndexPath method   -  CGFloat tableView  UITableView   tableView heightForRowAtIndexPath  NSIndexPath   indexPath   and  yeah silly me   i was resizing the label to default in cellForRowAtIndexPath method - i was overlooking the code i had written earlier    -  UITableViewCell   tableView  UITableView   tableView cellForRowAtIndexPath  NSIndexPath   indexPath

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sizeWithFont constrainedToSize lineBreakMode  is the method to use  An example of how to use it is below     Calculate the expected size based on the font and linebreak mode of your label    FLT MAX here simply means no constraint in height CGSize maximumLabelSize   CGSizeMake 296  FLT MAX    CGSize expectedLabelSize    yourString sizeWithFont yourLabel font constrainedToSize maximumLabelSize lineBreakMode yourLabel lineBreakMode         adjust the label the the new height  CGRect newFrame   yourLabel frame  newFrame size height   expectedLabelSize height  yourLabel frame   newFrame

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You can get height using below code  You have to pass   text 2  font 3  label width  func heightForLabel text  String  font  UIFont  width  CGFloat  - gt  CGFloat       let label UILabel   UILabel frame  CGRect x  0  y  0  width  width  height  CGFloat greatestFiniteMagnitude      label numberOfLines   0    label lineBreakMode   NSLineBreakMode byWordWrapping    label font   font    label text   text    label sizeToFit       return label frame height

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Thanks guys for help  here is the code I tried which is working for me     UILabel  instructions     UILabel alloc initWithFrame CGRectMake 10  225  300  180       NSString  text     First take clear picture and then try to zoom in to fit the       instructions text   text     instructions textAlignment   UITextAlignmentCenter     instructions lineBreakMode   NSLineBreakByWordWrapping      instructions setTextColor  UIColor grayColor        CGSize expectedLabelSize    text sizeWithFont instructions font                                  constrainedToSize instructions frame size                                     lineBreakMode UILineBreakModeWordWrap        CGRect newFrame   instructions frame      newFrame size height   expectedLabelSize height      instructions frame   newFrame      instructions numberOfLines   0       instructions sizeToFit        self addSubview instructions

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And for those that are migrating to iOS 8  here is a class extension for Swift   extension UILabel        func autoresize             if let textNSString  NSString   self text               let rect   textNSString boundingRectWithSize CGSizeMake self frame size width  CGFloat max                   options  NSStringDrawingOptions UsesLineFragmentOrigin                  attributes   NSFontAttributeName  self font                   context  nil              self frame   CGRectMake self frame origin x  self frame origin y  self frame size width  rect height

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sizeWithFont constrainedToSize lineBreakMode  is the method to use  An example of how to use it is below     Calculate the expected size based on the font and linebreak mode of your label    FLT MAX here simply means no constraint in height CGSize maximumLabelSize   CGSizeMake 296  FLT MAX    CGSize expectedLabelSize    yourString sizeWithFont yourLabel font constrainedToSize maximumLabelSize lineBreakMode yourLabel lineBreakMode         adjust the label the the new height  CGRect newFrame   yourLabel frame  newFrame size height   expectedLabelSize height  yourLabel frame   newFrame

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My code    UILabel  label          UILabel alloc  init   label numberOfLines   0  label lineBreakMode   NSLineBreakByWordWrapping  label text            text  label textAlignment   NSTextAlignmentCenter  label font             UIFont fontWithName  bodyTextFontFamily size  bodyFontSize    CGSize size    label sizeThatFits CGSizeMake width  MAXFLOAT      float height          size height  label frame           CGRectMake x  y  width  height

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One line is Chris s answer is wrong   newFrame size height   maximumLabelSize height    should be  newFrame size height   expectedLabelSize height    Other than that  it s the correct solution

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Adding to the above answers   This can be easily achieved via storyboard    Set constraint for UILabel  In my case I did top  left and fixed width  Set Number of line to 0 in Attribute Inspector Set Line Break to WordWrap in Attribute Inspector

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UILabel extension based on this answer for Swift 4 and above  extension UILabel        func retrieveTextHeight    - gt  CGFloat           let attributedText   NSAttributedString string  self text   attributes   NSFontAttributeName self font            let rect   attributedText boundingRect with  CGSize width  self frame size width  height  CGFloat greatestFiniteMagnitude   options   usesLineFragmentOrigin  context  nil           return ceil rect size height             Can be used like   self labelHeightConstraint constant   self label retrieveTextHeight

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And for those that are migrating to iOS 8  here is a class extension for Swift   extension UILabel        func autoresize             if let textNSString  NSString   self text               let rect   textNSString boundingRectWithSize CGSizeMake self frame size width  CGFloat max                   options  NSStringDrawingOptions UsesLineFragmentOrigin                  attributes   NSFontAttributeName  self font                   context  nil              self frame   CGRectMake self frame origin x  self frame origin y  self frame size width  rect height

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Updates according iOS7     If description are available for protocol protocolDescriptionLabel text    dataDictionary objectForKey   description     protocolDescriptionLabel sizeToFit    protocolDescriptionLabel setLineBreakMode NSLineBreakByWordWrapping    CGSize expectedLabelSize    protocolDescriptionLabel                textRectForBounds protocolDescriptionLabel frame                limitedToNumberOfLines protocolDescriptionLabel numberOfLines  size  NSLog   expectedLabelSize  f   expectedLabelSize height      adjust the label the the new height  CGRect newFrame   protocolDescriptionLabel frame  newFrame size height   expectedLabelSize height  protocolDescriptionLabel frame   newFrame

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To do this in Swift3 following is the code    let labelSizeWithFixedWith   CGSize width  300  height  CGFloat greatestFiniteMagnitude              let exactLabelsize   self label sizeThatFits labelSizeWithFixedWith              self label frame   CGRect origin  CGPoint x  20  y  20   size  exactLabelsize

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NSString  str     Please enter your text         CGSize lblSize    str sizeWithFont  UIFont systemFontOfSize 15  constrainedToSize  CGSizeMake 200 0f  600 0f  lineBreakMode  NSLineBreakByWordWrapping    UILabel  label     UILabel alloc init   label frame   CGRectMake 60  20  200  lblSize height   label numberOfLines   0  label lineBreakMode   NSLineBreakByWordWrapping  label font    UIFont systemFontOfSize 15   label text   str  label backgroundColor    UIColor clearColor    label sizeToFit    self view addSubview label

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You can implement TableViewController s  UITableViewCell   tableView cellForRowAtIndexPath   method in the following way  for example      define CELL LABEL TAG 1  -  UITableViewCell   tableView  UITableView   tableView  cellForRowAtIndexPath  NSIndexPath   indexPath       NSString  text     my long text        static NSString  MyIdentifier     MyIdentifier       UITableViewCell  cell    tableView dequeueReusableCellWithIdentifier MyIdentifier       if  cell    nil            cell      UITableViewCell alloc  initWithFrame CGRectZero  reuseIdentifier identifier  autorelease              CGFloat width    UIScreen mainScreen  bounds size width - 50      CGFloat height    self textHeight text    10      CGRect frame   CGRectMake 10 0f  10 0f  width  height        UILabel  cellLabel     UILabel alloc  initWithFrame frame       cellLabel tag   CELL LABEL TAG      cellLabel textColor    UIColor blackColor       cellLabel backgroundColor    UIColor clearColor       cellLabel textAlignment   UITextAlignmentLeft      cellLabel font    UIFont systemFontOfSize 12 0f        cell contentView addSubview cellLabel        cellLabel release        return cell     UILabel  label    UILabel    cell viewWithTag CELL LABEL TAG   label text   text  label numberOfLines   0   label sizeToFit   return cell    Also use NSString s sizeWithFont constrainedToSize lineBreakMode  method to compute the text s height

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Solution to iOS7 prior and iOS7 above         UILabel DynamicHeight m     For StackOverFlow        Created by Vijay on 24 02 14      Copyright  c  2014 http   Vijay-Apple-Dev blogspot com  All rights reserved       import  lt UIKit UIKit h gt    define SYSTEM VERSION GREATER THAN OR EQUAL TO v       UIDevice currentDevice  systemVersion  compare v options NSNumericSearch     NSOrderedAscending    define SYSTEM VERSION LESS THAN v                      UIDevice currentDevice  systemVersion  compare v options NSNumericSearch     NSOrderedAscending    define iOS7 0   7 0    interface UILabel  DynamicHeight                                                                                Calculate the size bounds frame of the Multi line Label                                                                                      Returns the size of the Label         param aLabel To be used to calculte the height         return size of the Label      - CGSize sizeOfMultiLineLabel    end          UILabel DynamicHeight m     For StackOverFlow        Created by Vijay on 24 02 14      Copyright  c  2014 http   Vijay-Apple-Dev blogspot com  All rights reserved       import  UILabel DynamicHeight h    implementation UILabel  DynamicHeight                                                                               Calculate the size bounds frame of the Multi line Label                                                                                      Returns the size of the Label         param aLabel To be used to calculte the height         return size of the Label     - CGSize sizeOfMultiLineLabel       NSAssert self    UILabel was nil           Label text     NSString  aLabelTextString    self text          Label font     UIFont  aLabelFont    self font          Width of the Label     CGFloat aLabelSizeWidth   self frame size width        if  SYSTEM VERSION LESS THAN iOS7 0               version  lt  7 0          return  aLabelTextString sizeWithFont aLabelFont                             constrainedToSize CGSizeMake aLabelSizeWidth  MAXFLOAT                                  lineBreakMode NSLineBreakByWordWrapping             else if  SYSTEM VERSION GREATER THAN OR EQUAL TO iOS7 0               version  gt   7 0            Return the calculated size of the Label         return  aLabelTextString boundingRectWithSize CGSizeMake aLabelSizeWidth  MAXFLOAT                                                options NSStringDrawingUsesLineFragmentOrigin                                            attributes                                                            NSFontAttributeName   aLabelFont                                                                                                         context nil  size              return  self bounds  size       end

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Check this work perfectly without adding Single line of code   Using Autolayout   I made a demo for you according to your requirement  Download it from below link   Autoresize UIView and UILabel  Step by Step Guide  -  Step 1  - Set constrain to UIView   1  Leading 2  Top 3  Trailing  From mainview     Step 2  - Set constrain to Label 1  1  Leading 2  Top 3  Trailing  From it s superview     Step 3  - Set constrain to Label 2  1  Leading 2  Trailing  From it s superview     Step 4  - Most tricky give botton to UILabel from UIView      Step 5  -  Optional  Set constrain to UIButton  1  Leading 2  Bottom 3  Trailing 4  Fixed Height  From mainview     Output  -    Note  - Make sure you have set Number of lines  0 in Label property     I hope this info enough to understand Autoresize UIView according to UILabel s height and Autoresize UILabel According to text

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Finally  it worked  Thank you guys   I was not getting it to work because i was trying to resize the label in heightForRowAtIndexPath method   -  CGFloat tableView  UITableView   tableView heightForRowAtIndexPath  NSIndexPath   indexPath   and  yeah silly me   i was resizing the label to default in cellForRowAtIndexPath method - i was overlooking the code i had written earlier    -  UITableViewCell   tableView  UITableView   tableView cellForRowAtIndexPath  NSIndexPath   indexPath

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This method will give perfect  height   - float  getHeightForText  NSString   text withFont  UIFont   font andWidth  float  width  CGSize constraint   CGSizeMake width   20000 0f   CGSize title size  float totalHeight    title size    text boundingRectWithSize constraint                                 options NSStringDrawingUsesLineFragmentOrigin                              attributes    NSFontAttributeName   font                                   context nil  size   totalHeight   ceil title size height    CGFloat height   MAX totalHeight  40 0f   return height

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You can implement TableViewController s  UITableViewCell   tableView cellForRowAtIndexPath   method in the following way  for example      define CELL LABEL TAG 1  -  UITableViewCell   tableView  UITableView   tableView  cellForRowAtIndexPath  NSIndexPath   indexPath       NSString  text     my long text        static NSString  MyIdentifier     MyIdentifier       UITableViewCell  cell    tableView dequeueReusableCellWithIdentifier MyIdentifier       if  cell    nil            cell      UITableViewCell alloc  initWithFrame CGRectZero  reuseIdentifier identifier  autorelease              CGFloat width    UIScreen mainScreen  bounds size width - 50      CGFloat height    self textHeight text    10      CGRect frame   CGRectMake 10 0f  10 0f  width  height        UILabel  cellLabel     UILabel alloc  initWithFrame frame       cellLabel tag   CELL LABEL TAG      cellLabel textColor    UIColor blackColor       cellLabel backgroundColor    UIColor clearColor       cellLabel textAlignment   UITextAlignmentLeft      cellLabel font    UIFont systemFontOfSize 12 0f        cell contentView addSubview cellLabel        cellLabel release        return cell     UILabel  label    UILabel    cell viewWithTag CELL LABEL TAG   label text   text  label numberOfLines   0   label sizeToFit   return cell    Also use NSString s sizeWithFont constrainedToSize lineBreakMode  method to compute the text s height

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My approach to compute the dynamic height of UILabel       let width          lt  width of this label      let text          lt  display content      label numberOfLines   0     label lineBreakMode    byWordWrapping     label preferredMaxLayoutWidth   width         Font of this label        label font   UIFont systemFont ofSize  17 0         Compute intrinsicContentSize based on font  and preferredMaxLayoutWidth     label invalidateIntrinsicContentSize           Destination height     let height   label intrinsicContentSize height   Wrap to function   func computeHeight text  String  width  CGFloat  - gt  CGFloat          A dummy label in order to compute dynamic height      let label   UILabel        label numberOfLines   0     label lineBreakMode    byWordWrapping     label font   UIFont systemFont ofSize  17 0       label preferredMaxLayoutWidth   width     label text   text     label invalidateIntrinsicContentSize        let height   label intrinsicContentSize height     return height

[ios] Adjust UILabel height depending on the text

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