UILabel - auto-size label to fit text

Question

Is it possible to auto-resize the UILabel box bounds to fit the contained text   I don t care if it ends up larger than the display   So if a user enters  hello  or  my name is really long i want it to fit in this box   it is never truncated and the label is  widened  accordingly

User · Answer

This is not as complicated as some of the other answers make it.

Pin the left and top edges

Just use auto layout to add constraints to pin the left and top sides of the label.

After that it will automatically resize.

Notes

Don't add constraints for the width and height. Labels have an intrinsic size based on their text content.
Thanks to this answer for help with this.

No need to set sizeToFit when using auto layout. My complete code for the example project is here:

import UIKit
class ViewController: UIViewController {

    @IBOutlet weak var myLabel: UILabel!

    @IBAction func changeTextButtonTapped(sender: UIButton) {
        myLabel.text = "my name is really long i want it to fit in this box"
    }
}

If you want your label to line wrap then set the number of lines to 0 in IB and add myLabel.preferredMaxLayoutWidth = 150 // or whatever in code. (I also pinned my button to the bottom of the label so that it would move down when the label height increased.)

If you are looking for dynamically sizing labels inside a UITableViewCell then see this answer.

User · Answer

I created some methods based Daniel s reply above    - CGFloat heightForLabel  UILabel   label withText  NSString   text       CGSize maximumLabelSize       CGSizeMake 290  FLT MAX        CGSize expectedLabelSize       text sizeWithFont label font                                 constrainedToSize maximumLabelSize                                     lineBreakMode label lineBreakMode        return expectedLabelSize height     - void resizeHeightToFitForLabel  UILabel   label       CGRect newFrame           label frame      newFrame size height       self heightForLabel label withText label text       label frame               newFrame     - void resizeHeightToFitForLabel  UILabel   label withText  NSString   text       label text                text       self resizeHeightToFitForLabel label

User · Answer

Here s what I am finding works for my situation   1  The height of the UILabel has a    0 constraint using autolayout  The width is fixed  2  Assign the text into the UILabel  which already has a superview at that point  not sure how vital that is   3  Then  do       label sizeToFit       label layoutIfNeeded     The height of the label is now set appropriately

User · Answer

You can size your label according to text and other related controls using two ways-   For iOS 7 0 and above  CGSize labelTextSize    labelText boundingRectWithSize CGSizeMake labelsWidth  MAXFLOAT                                            options NSStringDrawingUsesLineFragmentOrigin                                        attributes                                                        NSFontAttributeName   labelFont                                                                                                 context nil  size     before iOS 7 0 this could be used to calculate label size  CGSize labelTextSize    label text sizeWithFont label font                              constrainedToSize CGSizeMake label frame size width  MAXFLOAT                                    lineBreakMode NSLineBreakByWordWrapping        reframe other controls based on labelTextHeight  CGFloat labelTextHeight   labelTextSize height     If you do not want to calculate the size of the label s text than you can use -sizeToFit on the instance of UILabel as-   label setNumberOfLines 0      for multiline label  label setText   label text to set     label sizeToFit     call this to fit size of the label according to text       after this you can get the label frame to reframe other related controls

User · Answer

Use  label sizeToFit   to adjust the text in UILabel

User · Answer

implementation UILabel  UILabel Auto   -  void adjustHeight        if  self text    nil            self frame   CGRectMake self frame origin x  self frame origin y  self bounds size width  0           return             CGSize aSize   self bounds size      CGSize tmpSize   CGRectInfinite size      tmpSize width   aSize width       tmpSize    self text sizeWithFont self font constrainedToSize tmpSize        self frame   CGRectMake self frame origin x  self frame origin y  aSize width  tmpSize height       end   This is category method  You must set text first  than call this method to adjust UILabel s height

User · Answer

If we want that UILabel should shrink and expand based on text size then storyboard with autolayout is best option  Below are the steps to achieve this Steps  Put UILabel in view controller and place it wherever you want  Also put 0 for numberOfLines property of UILabel   Give it Top  Leading and Trailing space pin constraint      Now it will give warning  Click on the yellow arrow     Click on Update Frame and click on Fix Misplacement  Now this UILabel will shrink if text is less and expand if text is more

User · Answer

Add missing constraints in storyboard  Select UILabel in storyboard and set the attributes  Line  to 0  Ref Outlet the UILabel to Controller h with id label Controller m and add  label sizeToFit   in viewDidLoad

User · Answer

There s also this approach    self myLabel changeTextWithAutoHeight self myStringToAssignToLabel width 180 0f

User · Answer

Using  label sizeToFit   will achieve the same result from Daniels Category   Although I recommend to use autolayout and let the label resize itself based on constraints

User · Answer

Fits everytime          name text     Hi this the text I want to fit to      UIFont   font   14 0f      CGSize size    name text sizeWithAttributes   NSFontAttributeName  font        nameOfAssessment frame   CGRectMake 400  0  size width  44       nameOfAssessment font    UIFont systemFontOfSize font

User · Answer

Please check out my gist where I have made a category for UILabel for something very similar  my category lets a UILabel stretch it s height to show all the content   https   gist github com 1005520  Or check out this post  https   stackoverflow com a 7242981 662605  This would stretch the height  but you can change it around easily to work the other way and stretch the width with something like this  which is I believe what you want to do    implementation UILabel  dynamicSizeMeWidth   -  void resizeToStretch      float width    self expectedWidth       CGRect newFrame    self frame       newFrame size width   width       self setFrame newFrame      -  float expectedWidth       self setNumberOfLines 1        CGSize maximumLabelSize   CGSizeMake CGRectGetWidth self bounds   CGFLOAT MAX        CGSize expectedLabelSize     self text  sizeWithFont  self font                                               constrainedToSize maximumLabelSize                                             lineBreakMode  self lineBreakMode         return expectedLabelSize width      end   You could more simply use the sizeToFit method available from the UIView class  but set the number of lines to 1 to be safe     iOS 6 update  If you are using AutoLayout  then you have a built in solution  By setting the number of lines to 0  the framework will resize your label appropriately  adding more height  to fit your text     iOS 8 update  sizeWithFont  is deprecated so use sizeWithAttributes  instead   -  float expectedWidth       self setNumberOfLines 1        CGSize expectedLabelSize     self text  sizeWithAttributes   NSFontAttributeName self font         return expectedLabelSize width

User · Answer

you can show one line output then set property Line 0 and show multiple line output then set property Line 1 and more    self yourLableName sizeToFit

User · Answer

I had a huge problems with auto layout   We have two containers inside table cell  Second container is resized depending on Item description  0 - 1000 chars   and row should be resized based on them    The missing ingredient was bottom constraint for description    I ve changed bottom constraint of dynamic element from   0 to    0

[ios] UILabel - auto-size label to fit text?

Pin the left and top edges

Notes

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