UILabel is not auto-shrinking text to fit label size

Question

I have this strange issue  and im dealing with it for more than 8 hours now   Depending on situation i have to calculate UILabels size dynamically    e g my UIViewController receives an event and i change UILabels size  from bigger to smaller  The size of my UILabel gets smaller and i get the correct needed size  but the text in my UILabel stays the same  the same font size and etc  I need the font to get smaller  for the whole text to fit the UILabel  So the question is how to make the text to fit my label with autoshrinking or something like that   In my xib  UILabels autoshrink is checked  also number of lines is set to 0  and also my string has new line symbols   n   and i ve selected linebreakmode to wordwrap  Maybe anyone was in the same situation as i am now  and could help me  I would really appreciate that   Thank s in advance   EDIT  UILabel minimum font size is set to 10

User · Answer

Here s how to do it Suppose the following messageLabel is the label you want to have the desired effect Now try these simple line of codes         SET THE WIDTH CONSTRAINTS FOR LABEL      CGFloat constrainedWidth   240 0f   YOU CAN PUT YOUR DESIRED ONE THE MAXIMUM WIDTH OF YOUR LABEL     CALCULATE THE SPACE FOR THE TEXT SPECIFIED      CGSize sizeOfText  yourText sizeWithFont yourFont constrainedToSize CGSizeMake constrainedWidth  CGFLOAT MAX  lineBreakMode UILineBreakModeWordWrap       UILabel  messageLabel   UILabel alloc  initWithFrame CGRectMake 20 20 constrainedWidth sizeOfText height        messageLabel text yourText      messageLabel numberOfLines 0   JUST TO SUPPORT MULTILINING

User · Answer

also my solution is the boolean label adjustsFontSizeToFitWidth   YES  BUT  You must in the interface Builder the Word Wrapping switch to  CLIP   Then autoshrink the Labels  This is very important

User · Answer

does not work if numberOfLines  gt  1  What i did made a condition like this-  if lblRecLocation text length  gt  100      lblRecLocation font    UIFont fontWithName   app font name  size 10

User · Answer

You can write like  UILabel  reviews     UILabel alloc initWithFrame CGRectMake 14  13 270 30     Set frame reviews numberOfLines 0  reviews textAlignment   UITextAlignmentLeft  reviews font    UIFont fontWithName   Arial Rounded MT Bold  size 12   reviews textColor  UIColor colorWithRed 0 0 255 0 green 0 0 255 0 blue 0 0 255 0 alpha 0 8    reviews backgroundColor  UIColor clearColor     You can calculate number of lines like that  CGSize maxlblSize   CGSizeMake 270 9999   CGSize totalSize    reviews text sizeWithFont reviews font                constrainedToSize maxlblSize lineBreakMode reviews lineBreakMode    CGRect newFrame  reviews frame  newFrame size height   totalSize height  reviews frame   newFrame   CGFloat reviewlblheight   totalSize height   int lines reviewlblheight 12   12 is the font size of label     UILabel  lbl   UILabel alloc init   lbl frame CGRectMake 140 220   100  25    set frame as your requirement lbl font  UIFont fontWithName   Arial  size 20    lbl setAutoresizingMask UIViewContentModeScaleAspectFill    lbl setLineBreakMode UILineBreakModeClip   lbl adjustsFontSizeToFitWidth YES   This is main for shrinking font lbl text   HelloHelloHello     Hope this will help you  -  waiting for your reply

User · Answer

This is how I get UILabel Autoshrink work  especially for height of label font fitting in 4s device from 6s Plus Storyboard  in iOS 9 2  Xcode 7 2         Number of lines is 0 Line Breaks  Clip Autoshrink  Minimum Font Scale 0 25

User · Answer

I think you can write bellow code after alloc init Label           UILabel  lbl     UILabel alloc initWithFrame CGRectMake 0  10  280  50    lbl text     vbdsbfdshfisdhfidshufidhsufhdsf dhdsfhdksbf hfsdh fksdfidsf sdfhsd fhdsf sdhfh sdifsdkf ksdhfkds fhdsf dsfkdsfkjdhsfkjdhskfjhsdk fdhsf     lbl setMinimumFontSize 8 0    lbl setNumberOfLines 0    lbl setFont  UIFont systemFontOfSize 10 0    lbl lineBreakMode   UILineBreakModeWordWrap  lbl backgroundColor    UIColor redColor    lbl sizeToFit    self view addSubview lbl     It is working with me fine Use it

User · Answer

Well in the end i didn t find my answer  And i think the autoshrink doesn t work for multiple lines  I ended up using suggestion in this link  autoshrink on a UILabel with multiple lines  The solutions is to calulate text height at given width and if text is bigger  to shrink font size and then do he same again until the height is equal or less than your needed size   I don t understand why this should be so hard to implement  If i m missing something  everyone is welcome to correct me

User · Answer

Coming late to the party  but since I had the additional requirement of having one word per line  this one addition did the trick for me   label numberOfLines    labelString componentsSeparatedByString       count   Apple Docs say      Normally  the label text is drawn with the font you specify in the font property  If this property is set to YES  however  and the text in the text property exceeds the label   s bounding rectangle  the receiver starts reducing the font size until the string fits or the minimum font size is reached  In iOS 6 and earlier  this property is effective only when the numberOfLines property is set to 1    But this is a lie  A lie I tell you  It s true for all iOS versions  Specifically  this is true when using a UILabel within a UICollectionViewCell for which the size is determined by constraints adjusted dynamically at runtime via custom layout  ex  self menuCollectionViewLayout itemSize   size    So when used in conjunction with adjustsFontSizeToFitWidth and minimumScaleFactor  as mentioned in previous answers  programmatically setting numberOfLines based on word count solved the autoshrink problem  Doing something similar based on word count or even character count might produce a  close enough  solution

User · Answer

In iOS 9 I just had to    Add constraints from the left and right of the label to the superview  Set the line break mode to clipping in IB  Set the number of lines to 1 in IB    Someone recommended setting number of lines to 0  but for me this just made the label go to multiple lines

User · Answer

It s a great question  because it feels like that would be part of the built-in UIKit functionality or a related framework by now  Here s a good visual example of the question     There s no easy way around it  but it s definitely possible  One way to do this is to programmatically try different font sizes until you find one that fits reasonably close to the bounds of the view  You can accomplish this with the boundingRect   function of NSString or NSAttributedString  For example   let string    This is a test  let infiniteSize   CGSize width  CGFloat greatestFiniteMagnitude  height CGFloat greatestFiniteMagnitude  let size   string boundingRect with  infiniteSize  options      attributes    font  UIFont systemFont ofSize  avgSize   context  nil  size   You can do a binary search to be more efficient than a complete brute force approach  There are also some considerations that are a bit more involved  including correct word wrapping and iOS font caching performance  if you re looking for something really robust   If you only care about showing the text on the screen in an easy way  I have developed a robust implementation in Swift  which I m also using in a production app  It s a UIView subclass with efficient  automatic font scaling for any input text  including multiple lines  To use it  you d simply do something like   let view   AKTextView      Use a simple or fancy NSAttributedString view attributedText    init string   Some text here      Add to the view hierarchy somewhere   That s it  You can find the complete source here  https   github com FlickType AccessibilityKit  Hope this helps

User · Answer

In Swift 4  Programmatically     let label   UILabel frame  CGRect x  0  y  0  width  200 0  height  200 0   label adjustsFontSizeToFitWidth   true label numberOfLines   0  label text    Lorem Ipsum is simply dummy text of the printing and typesetting industry  Lorem Ipsum has been the industry s standard dummy text ever since the 1500s  when an unknown printer took a galley of type and scrambled it to make a type specimen book  It has survived not only five centuries  but also the leap into electronic typesetting  remaining essentially unchanged  It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages  and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum    view addSubview label

User · Answer

This is for Swift 3 running Xcode 8 2 1   8C1002     The best solution that I ve found is to set a fixed width in your Storyboard or IB on the label  Set your constraints with constrain to margins  In your viewDidLoad add the following lines of code   override func viewDidLoad                 super viewDidLoad                label numberOfLines   1             label adjustsFontSizeToFitWidth   true             label minimumScaleFactor   0 5                   This worked like a charm and it doesn t overflow to a new line and shrinks the text to fit the width of the label without any weird issues and works in Swift 3

User · Answer

In case you are still searching for a better solution  I think this is what you want  A Boolean value indicating whether the font size should be reduced in order to fit the title string into the label   s bounding rectangle  this property is effective only when the numberOfLines property is set to 1   When setting this property  minimumScaleFactor MUST be set too  a good default is 0 5   Swift var adjustsFontSizeToFitWidth  Bool   get set    Objective-C  property nonatomic  BOOL adjustsFontSizeToFitWidth    A Boolean value indicating whether spacing between letters should be adjusted to fit the string within the label   s bounds rectangle  Swift var allowsDefaultTighteningForTruncation  Bool   get set    Objective-C  property nonatomic  BOOL allowsDefaultTighteningForTruncation   Source

User · Answer

In Swift 3  Programmatically  I had to do this   let lbl   UILabel   lbl numberOfLines   0 lbl lineBreakMode    byClipping lbl adjustsFontSizeToFitWidth   true lbl minimumScaleFactor   0 5 lbl font   UIFont systemFont ofSize  15

User · Answer

Two years on  and this issue is still around     In iOS 8   XCode 6 1  I was sometimes finding that my UILabel  created in a UITableViewCell  with AutoLayout turned on  and flexible constraints so it had plenty of space  wouldn t resize itself to fit the text string   The solution  as in previous years  was to set the text  and then call sizeToFit   - UITableViewCell   tableView  UITableView   tableView cellForRowAtIndexPath  NSIndexPath   indexPath                 cell lblCreatedAt text    note getCreatedDateAsString        cell lblCreatedAt sizeToFit        Sigh

User · Answer

Swift 4  Xcode 9 4 1  The solution that worked for me   I had a label within a collection view cell  and the label text was getting trimmed  Set the attributes as below on Storyboard  Lines   0 LineBreak   Word Wrap Set yourlabel s leading and trailing constraint   0  using Autolayout

User · Answer

minimumFontSize is deprecated in iOS 6   So use minimumScaleFactor instead of minmimumFontSize   lbl adjustsFontSizeToFitWidth   YES lbl minimumScaleFactor   0 5   Swift 5  lbl adjustsFontSizeToFitWidth   true lbl minimumScaleFactor   0 5

[iphone] UILabel is not auto-shrinking text to fit label size

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