iOS UIButton resize according to text length

Question

In interface builder  holding Command     will resize a button to fit its text  I was wondering if this was possible to do programmatically before the button was added to the view    UIButton  button    UIButton buttonWithType UIButtonTypeCustom    button titleLabel setFont  UIFont fontWithName   Arial-BoldMT  size 12     button addTarget self action  selector buttonTapped   forControlEvents UIControlEventTouchUpInside      I need to know the width needed to accomodate NSStringVariable  button setTitle NSStringVariable forState UIControlStateNormal       So that I can set the width property of the button before addSubview  button setFrame CGRectMake 10  0  width  fixedHeight     subNavigation addSubview button

User · Answer

sizeToFit doesn t work correctly  instead   myButton size   myButton sizeThatFits CGSize zero    you also can add contentInset to the button   myButton contentEdgeInsets   UIEdgeInsetsMake 8  8  4  8

User · Answer

The way to do this in code is    button sizeToFit     If you are subclassing and want to add extra rules you can override   -  CGSize sizeThatFits  CGSize size

User · Answer

To be honest I think that it s really shame that there is no simple checkbox in storyboard to say that you want to resize buttons to accommodate the text  Well    whatever   Here is the simplest solution using storyboard    Place UIView and put constraints for it  Example   Place UILabel inside UIView  Set constraints to attach it to edges of UIView  Place your UIButton inside UIView  Set the same constraints to attach it to the edges of UIView  Set 0 for UILabel s number of lines   Set up the outlets          IBOutlet var button  UIButton       IBOutlet var textOnTheButton  UILabel     Get some long  long  long title         let someTitle    Lorem ipsum dolor sit amet  consectetur adipiscing elit  sed do eiusmod tempor incididunt ut labore et dolore magna aliqua  Ut enim ad minim veniam  quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat  Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur  Excepteur sint occaecat cupidatat non proident  sunt in culpa qui officia deserunt mollit anim id est laborum      On viewDidLoad set the title both for UILabel and UIButton         override func viewDidLoad             super viewDidLoad           textOnTheButton text   someTitle         button setTitle someTitle  for   normal          button titleLabel  numberOfLines   0          Run it to make sure that button is resized and can be pressed

User · Answer

Simply    Create UIView as wrapper with auto layout to views around   Put UILabel inside that wrapper  Add constraints that will stick tyour label to edges of wrapper  Put UIButton inside your wrapper  then simple add the same constraints as you did for UILabel  Enjoy your autosized button along with text

User · Answer

To accomplish this using autolayout  try setting a variable width constraint     You may also need to adjust your Content Hugging Priority and Content Compression Resistance Priority to get the results you need     UILabel is completely automatically self-sizing   This UILabel is simply set to be centered on the screen  two constraints only  horizontal vertical    It changes widths totally automatically   You do not need to set any width or height - it s totally automatic       Notice the small yellow squares are simply attached   spacing  of zero   They automatically move as the UILabel resizes   Adding a      constraint sets a minimum width for the UILabel

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In UIKit  there are additions to the NSString class to get from a given NSString object the size it ll take up when rendered in a certain font   Docs was here  Now it s here under Deprecated   In short  if you go   CGSize stringsize    myString sizeWithFont  UIFont systemFontOfSize 14       or whatever font you re using  button setFrame CGRectMake 10 0 stringsize width  stringsize height         you ll have set the button s frame to the height and width of the string you re rendering   You ll probably want to experiment with some buffer space around that CGSize  but you ll be starting in the right place

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This button class with height autoresizing for text  for Xamarin but can be rewritten for other language    Register nameof ResizableButton    public class ResizableButton   UIButton       NSLayoutConstraint  heightConstraint      public bool NeedsUpdateHeightConstraint   get  private set      true       public ResizableButton          public ResizableButton UIButtonType type    base type         public ResizableButton NSCoder coder    base coder         public ResizableButton CGRect frame    base frame         protected ResizableButton NSObjectFlag t    base t         protected internal ResizableButton IntPtr handle    base handle         public override void LayoutSubviews                 base LayoutSubviews            UpdateHeightConstraint            InvalidateIntrinsicContentSize               public override void SetTitle string title  UIControlState forState                NeedsUpdateHeightConstraint   true          base SetTitle title  forState              private void UpdateHeightConstraint                 if   NeedsUpdateHeightConstraint              return          NeedsUpdateHeightConstraint   false          var labelSize   TitleLabel SizeThatFits new CGSize Frame Width - TitleEdgeInsets Left - TitleEdgeInsets Right  float MaxValue             var rect   new CGRect Frame X  Frame Y  Frame Width  labelSize Height   TitleEdgeInsets Top   TitleEdgeInsets Bottom            if   heightConstraint    null              RemoveConstraint  heightConstraint             heightConstraint   NSLayoutConstraint Create this  NSLayoutAttribute Height  NSLayoutRelation Equal  1  rect Height           AddConstraint  heightConstraint               public override CGSize IntrinsicContentSize                 get                         var labelSize   TitleLabel SizeThatFits new CGSize Frame Width - TitleEdgeInsets Left - TitleEdgeInsets Right  float MaxValue                 return new CGSize Frame Width  labelSize Height   TitleEdgeInsets Top   TitleEdgeInsets Bottom

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In Xcode 4 5 and above  this can now be done by using  Auto-layouting   Constraints    Major advantages are that     You don t need to programmatically set frames at all  If done right  you don t need to bother about resetting frames for orientation changes   Also  device changes needn t bother you  read  no need to code separately for different screen sizes     A few disadvantages    Not backward compatible - works only for iOS 6 and above  Need to get familiarised  but will save time later on     Coolest thing is we get to focus on declaring an intent such as    I want these two buttons to be of the same width  or I need this view to be vertically centered and extend to a max entent of 10 pts from the superview s edge   or even  I want this button label to resize according to the label it is displaying    Here is a simple tutorial to get introduced to auto-layouting   For a more details   It takes some time at first  but it sure looks like it will be well worth the effort

User · Answer

If you want to resize the text as opposed to the button  you can use      button titleLabel adjustsFontSizeToFitWidth   YES  button titleLabel minimumScaleFactor    5     The  5 value means that I will let it go down to half the original font size     before the texts gets truncated     note  if using anything pre ios6  you would use I think button titleLabel minimumFontSize   8

User · Answer

I have some additional needs related to this post that sizeToFit does not solve   I needed to keep the button centered in it s original location  regardless of the text   I also never want the button to be larger than its original size     So  I layout the button for its maximum size  save that size in the Controller and use the following method to size the button when the text changes      void  sizeButtonToText  UIButton   button availableSize  CGSize availableSize padding  UIEdgeInsets padding             CGRect boundsForText   button frame          Measures string     CGSize stringSize    button titleLabel text sizeWithFont button titleLabel font       stringSize width   MIN stringSize width   padding left   padding right  availableSize width           Center s location of button     boundsForText origin x     boundsForText size width - stringSize width    2      boundsForText size width   stringSize width       button setFrame boundsForText

User · Answer

Swift 4 2  Thank god  this solved  After setting a text to the button  you can retrieve intrinsicContentSize which is the natural size from an UIView  the official document is here   For UIButton  you can use it like below   button intrinsicContentSize width   For your information  I adjusted the width to make it look properly   button frame   CGRect fx  xOffset  y  0 0  width  button intrinsicContentSize width   18  height  40    Simulator  UIButtons with intrinsicContentSize  Source  https   riptutorial com ios example 16418 get-uibutton-s-size-strictly-based-on-its-text-and-font

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If your button was made with Interface Builder  and you re changing the title in code  you can do this    self button setTitle   Button Title  forState UIControlStateNormal    self button sizeToFit

User · Answer

For some reason  func sizeToFit   does not work for me   My set up is I am using a button inside a UITableViewCell and I am using auto layout    What worked for me is    get the width constraint get the intrinsicContentSize width because according the this document auto layout is not aware of the intrinsicContentSize   Set the width constraint to the intrinsicContentSize width     Here re two titles from the Debug View Hierachry

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Swift   The important thing here is when will you call the  sizeToFit     it should be after setting the text to display so it can read the size needed  if you later update text  then call it again   var button   UIButton   button setTitle  Length of this text determines size   forState  UIControlState Normal  button sizeToFit   self view addSubview button

[ios] iOS: UIButton resize according to text length

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