How to calculate UILabel width based on text length

Question

I want to display an image next to a UILabel  however UILabel has variable text length  so I don t know where to place the image  How can I accomplish this

User · Answer

Swift 4 Answer who are using Constraint  label text    Hello World   var rect  CGRect   label frame   get frame of label rect size    label text  size attributes   NSFontAttributeName  UIFont name  label font fontName   size  label font pointSize         Calculate as per label font labelWidth constant   rect width    set width to Constraint outlet   Swift 5 Answer who are using Constraint  label text    Hello World   var rect  CGRect   label frame   get frame of label rect size    label text  size withAttributes   NSAttributedString Key font  UIFont name  label font fontName   size  label font pointSize         Calculate as per label font labelWidth constant   rect width    set width to Constraint outlet

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In swift   yourLabel intrinsicContentSize   width

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CGRect rect   label frame  rect size    label text sizeWithAttributes   NSFontAttributeName    UIFont fontWithName label font fontName size label font pointSize     label frame   rect

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CGSize expectedLabelSize    yourString sizeWithFont yourLabel font                          constrainedToSize maximumLabelSize                          lineBreakMode yourLabel lineBreakMode      What is - NSString sizeWithFont forWidth lineBreakMode   good for   this question might have your answer  it worked for me     For 2014  I edited in this new version  based on the ultra-handy comment by Norbert below  This does everything  Cheers     yourLabel is your UILabel   float widthIs      self yourLabel text   boundingRectWithSize self yourLabel frame size                                              options NSStringDrawingUsesLineFragmentOrigin   attributes    NSFontAttributeName self yourLabel font     context nil      size width   NSLog   the width of yourLabel is  f   widthIs

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In iOS8 sizeWithFont has been deprecated  please refer to   CGSize yourLabelSize    yourLabel text sizeWithAttributes   NSFontAttributeName    UIFont fontWithName yourLabel font size yourLabel fontSize       You can add all the attributes you want in sizeWithAttributes   Other attributes you can set   - NSForegroundColorAttributeName - NSParagraphStyleAttributeName - NSBackgroundColorAttributeName - NSShadowAttributeName   and so on  But probably you won t need the others

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Here s something I came up with after applying a few principles other SO posts  including Aaron s link  AnnotationPin  myAnnotation    AnnotationPin   annotation   self    super initWithAnnotation myAnnotation reuseIdentifier reuseIdentifier   self backgroundColor    UIColor greenColor   self frame   CGRectMake 0 0 30 30   imageView     UIImageView alloc  initWithImage myAnnotation THEIMAGE   imageView frame   CGRectMake 3 3 20 20   imageView layer masksToBounds   NO   self addSubview imageView    imageView release    CGSize titleSize    myAnnotation THETEXT sizeWithFont  UIFont systemFontOfSize 12    CGRect newFrame   self frame  newFrame size height   titleSize height   12  newFrame size width   titleSize width   32  self frame   newFrame  self layer borderColor    UIColor colorWithRed 0 green  3 blue 0 alpha 1 0f  CGColor  self layer borderWidth   3 0           UILabel  infoLabel     UILabel alloc  initWithFrame CGRectMake 26 5 newFrame size width-32 newFrame size height-12    infoLabel text   myAnnotation title  infoLabel backgroundColor    UIColor clearColor   infoLabel textColor    UIColor blackColor   infoLabel textAlignment   UITextAlignmentCenter  infoLabel font    UIFont systemFontOfSize 12     self addSubview infoLabel    infoLabel release    In this example  I m adding a custom pin to a MKAnnotation class that resizes a UILabel according to the text size   It also adds an image on the left side of the view  so you see some of the code managing the proper spacing to handle the image and padding  The key is to use CGSize titleSize    myAnnotation THETEXT sizeWithFont  UIFont systemFontOfSize 12    and then redefine the view s dimensions   You can apply this logic to any view  Although Aaron s answer works for some  it didn t work for me   This is a far more detailed explanation that you should try immediately before going anywhere else if you want a more dynamic view with an image and resizable UILabel   I already did all the work for you

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The selected answer is correct for iOS 6 and below   In iOS 7  sizeWithFont constrainedToSize lineBreakMode  has been deprecated  It is now recommended you use boundingRectWithSize options attributes context    CGRect expectedLabelSize    yourString boundingRectWithSize sizeOfRect                                                     options  lt NSStringDrawingOptions gt                                                   attributes                                                        NSFontAttributeName  yourString font                                                     AnyOtherAttributes  valuesForAttributes                                                                                                        context  NSStringDrawingContext        Note that the return value is a CGRect not a CGSize  Hopefully that ll be of some assistance to people using it in iOS 7

User · Answer

yourLabel intrinsicContentSize width for Objective-C   Swift

[ios] How to calculate UILabel width based on text length?

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