Replacement for deprecated sizeWithFont in iOS 7

Question

In iOS 7  sizeWithFont  is now deprecated  How do I now pass in the UIFont object into the replacement method sizeWithAttributes

User · Answer

I believe the function was deprecated because that series of NSString+UIKit functions (sizewithFont:..., etc) were based on the UIStringDrawing library, which wasn't thread safe. If you tried to run them not on the main thread (like any other UIKit functionality), you'll get unpredictable behaviors. In particular, if you ran the function on multiple threads simultaneously, it'll probably crash your app. This is why in iOS 6, they introduced a the boundingRectWithSize:... method for NSAttributedString. This was built on top of the NSStringDrawing libraries and is thread safe.

If you look at the new NSString boundingRectWithSize:... function, it asks for an attributes array in the same manner as a NSAttributeString. If I had to guess, this new NSString function in iOS 7 is merely a wrapper for the NSAttributeString function from iOS 6.

On that note, if you were only supporting iOS 6 and iOS 7, then I would definitely change all of your NSString sizeWithFont:... to the NSAttributeString boundingRectWithSize. It'll save you a lot of headache if you happen to have a weird multi-threading corner case! Here's how I converted NSString sizeWithFont:constrainedToSize::

What used to be:

NSString *text = ...;
CGFloat width = ...;
UIFont *font = ...;
CGSize size = [text sizeWithFont:font 
               constrainedToSize:(CGSize){width, CGFLOAT_MAX}];

Can be replaced with:

NSString *text = ...;
CGFloat width = ...;
UIFont *font = ...;
NSAttributedString *attributedText =
    [[NSAttributedString alloc] initWithString:text 
                                    attributes:@{NSFontAttributeName: font}];
CGRect rect = [attributedText boundingRectWithSize:(CGSize){width, CGFLOAT_MAX}
                                           options:NSStringDrawingUsesLineFragmentOrigin
                                           context:nil];
CGSize size = rect.size;

Please note the documentation mentions:

In iOS 7 and later, this method returns fractional sizes (in the size component of the returned CGRect); to use a returned size to size views, you must use raise its value to the nearest higher integer using the ceil function.

So to pull out the calculated height or width to be used for sizing views, I would use:

CGFloat height = ceilf(size.height);
CGFloat width  = ceilf(size.width);

User · Answer

Building on  bitsand  this is a new method I just added to my NSString Extras category   -  CGRect  boundingRectWithFont  UIFont    font constrainedToSize  CGSize  constraintSize lineBreakMode  NSLineBreakMode  lineBreakMode           set paragraph style     NSMutableParagraphStyle  style     NSParagraphStyle defaultParagraphStyle  mutableCopy        style setLineBreakMode lineBreakMode           make dictionary of attributes with paragraph style     NSDictionary  sizeAttributes     NSFontAttributeName font  NSParagraphStyleAttributeName  style        CGRect frame    self boundingRectWithSize constraintSize options NSStringDrawingUsesLineFragmentOrigin attributes sizeAttributes context nil                  OLD     CGSize stringSize    self sizeWithFont font                               constrainedToSize constraintSize                                   lineBreakMode lineBreakMode          OLD             return frame      I just use the size of the resulting frame

User · Answer

As you can see sizeWithFont at Apple Developer site it is deprecated so we need to use sizeWithAttributes    define SYSTEM VERSION LESS THAN v      UIDevice currentDevice  systemVersion  compare v options NSNumericSearch     NSOrderedAscending   NSString  text     Hello iOS 7 0   if  SYSTEM VERSION LESS THAN   7 0             code here for iOS 5 0 6 0 and so on     CGSize fontSize    text sizeWithFont  UIFont fontWithName   Helvetica                                                            size 12      else          code here for iOS 7 0    CGSize fontSize    text sizeWithAttributes                                 NSFontAttributeName                                  UIFont fontWithName   Helvetica  size 12

User · Answer

As the  Ayush answer      As you can see sizeWithFont at Apple Developer site it is deprecated so we need to use sizeWithAttributes    Well  supposing that in 2019  you are probably using Swift and String instead of Objective-c and NSString  here s the correct way do get the size of a String with predefined font   let stringSize   NSString string  label text   size withAttributes    font   UIFont name   OpenSans-Regular   size  15

User · Answer

max size constraint CGSize maximumLabelSize   CGSizeMake 184  FLT MAX      font UIFont  font    UIFont fontWithName TRADE GOTHIC REGULAR size 20 0f       set paragraph style NSMutableParagraphStyle  paragraphStyle     NSMutableParagraphStyle alloc  init   paragraphStyle lineBreakMode   NSLineBreakByWordWrapping      dictionary of attributes NSDictionary  attributes     NSFontAttributeName font                               NSParagraphStyleAttributeName  paragraphStyle copy    CGRect textRect    string boundingRectWithSize  maximumLabelSize                                      options NSStringDrawingUsesLineFragmentOrigin                                   attributes attributes                                      context nil    CGSize expectedLabelSize   CGSizeMake ceil textRect size width   ceil textRect size height

User · Answer

None of this worked for me in ios 7   Here is what I ended up doing   I put this in my custom cell class and call the method in my heightForCellAtIndexPath method   My cell looks similar to the description cell when viewing an app in the app store   First in the storyboard  set your label to  attributedText   set the number of lines to 0  which will resize the label automatically  ios 6  only   and set it to word wrap     Then i just add up all the heights of the content of the cell in my custom Cell Class   In my case I have a Label at the top that always says  Description    descriptionHeadingLabel   a smaller label that is variable in size that contains the actual description   descriptionLabel  a constraint from the top of the cell to the heading   descriptionHeadingLabelTopConstraint    I also added 3 to space out the bottom a little bit  about the same amount apple places on the subtitle type cell    -  CGFloat calculateHeight       CGFloat width    descriptionLabel frame size width      NSAttributedString  attributedText    descriptionLabel attributedText      CGRect rect    attributedText boundingRectWithSize  CGSize  width  CGFLOAT MAX  options  NSStringDrawingUsesLineFragmentOrigin context nil        return rect size height    descriptionHeadingLabel frame size height    descriptionHeadingLabelTopConstraint constant   3      And in my Table View delegate   -  CGFloat tableView  UITableView   tableView heightForRowAtIndexPath  NSIndexPath   indexPath        if  indexPath row    0            UITableViewCell  cell    tableView dequeueReusableCellWithIdentifier   descriptionCell            DescriptionCell  descriptionCell    DescriptionCell   cell          NSString  text     event objectForKey   description            descriptionCell descriptionLabel text   text           return  descriptionCell calculateHeight              return 44 0f      You can change the if statement to be a little  smarter  and actually get the cell identifier from some sort of data source   In my case the cells are going to be hard coded since there will be fixed amount of them in a specific order

User · Answer

Better use automatic dimensions  Swift      tableView estimatedRowHeight   68 0   tableView rowHeight   UITableViewAutomaticDimension   NB   1  UITableViewCell prototype should be properly designed   for the instance don t forget set UILabel numberOfLines   0 etc   2  Remove HeightForRowAtIndexPath method    VIDEO  https   youtu be Sz3XfCsSb6k

User · Answer

Create a function that takes a UILabel instance  and returns CGSize  CGSize constraint   CGSizeMake label frame size width   2000 0      Adjust according to requirement  CGSize size  if    UIDevice currentDevice  systemVersion  floatValue   gt   7 0        NSRange range   NSMakeRange 0   label attributedText length         NSDictionary  attributes    label attributedText attributesAtIndex 0 effectiveRange  amp range       CGSize boundingBox    label text boundingRectWithSize constraint options  NSStringDrawingUsesLineFragmentOrigin attributes attributes context nil  size       size   CGSizeMake ceil boundingBox width   ceil boundingBox height      else      size    label text sizeWithFont label font constrainedToSize constraint lineBreakMode label lineBreakMode      return size

User · Answer

Multi-line labels using dynamic height may require additional information to set the size properly   You can use sizeWithAttributes with UIFont and NSParagraphStyle to specify both the font and the line-break mode     You would define the Paragraph Style and use an NSDictionary like this      set paragraph style NSMutableParagraphStyle  style     NSParagraphStyle defaultParagraphStyle  mutableCopy    style setLineBreakMode NSLineBreakByWordWrapping      make dictionary of attributes with paragraph style NSDictionary  sizeAttributes            NSFontAttributeName myLabel font  NSParagraphStyleAttributeName  style      get the CGSize CGSize adjustedSize   CGSizeMake label frame size width  CGFLOAT MAX       alternatively you can also get a CGRect to determine height CGRect rect    myLabel text boundingRectWithSize adjustedSize                                                          options NSStringDrawingUsesLineFragmentOrigin                                                       attributes sizeAttributes                                                          context nil     You can use the CGSize  adjustedSize  or CGRect as rect size height property if you re looking for the height   More info on NSParagraphStyle here  https   developer apple com library mac documentation cocoa reference applicationkit classes NSParagraphStyle Class Reference Reference html

User · Answer

Here is the monotouch equivalent if anyone needs it        lt summary gt      Measures the height of the string for the given width       lt  summary gt       lt param name  text  gt The text  lt  param gt       lt param name  font  gt The font  lt  param gt       lt param name  width  gt The width  lt  param gt       lt param name  padding  gt The padding  lt  param gt       lt returns gt  lt  returns gt  public static float MeasureStringHeightForWidth this string text  UIFont font  float width  float padding   20        NSAttributedString attributedString   new NSAttributedString text  new UIStringAttributes     Font   font         RectangleF rect   attributedString GetBoundingRect new SizeF width  float MaxValue   NSStringDrawingOptions UsesLineFragmentOrigin  null       return rect Height   padding      which can be used like this   public override float GetHeightForRow UITableView tableView  NSIndexPath indexPath          Elements is a string array     return Elements indexPath Row  MeasureStringHeightForWidth UIFont SystemFontOfSize UIFont LabelFontSize   tableView Frame Size Width - 15 - 30 - 15

User · Answer

Accepted answer in Xamarin would be  use sizeWithAttributes and UITextAttributeFont            UIStringAttributes attributes   new UIStringAttributes                        Font   UIFont SystemFontOfSize 17                       var size   text GetSizeUsingAttributes attributes

User · Answer

You can still use sizeWithFont  but  in iOS    7 0 method cause crashing if the string contains leading and trailing spaces or end lines  n   Trimming text before using it  label text    label text stringByTrimmingCharactersInSet                NSCharacterSet whitespaceAndNewlineCharacterSet      That s also may apply to sizeWithAttributes and  label sizeToFit    also  whenever you have nsstringdrawingtextstorage message sent to deallocated instance in iOS 7 0 device it deals with this

User · Answer

Try  this syntax   NSAttributedString  attributedText         NSAttributedString alloc  initWithString text                                      attributes   NSFontAttributeName  font

User · Answer

Use sizeWithAttributes  instead  which now takes an NSDictionary  Pass in the pair with key UITextAttributeFont and your font object like this  CGRect rawRect       rawRect size    string sizeWithAttributes         NSFontAttributeName   UIFont systemFontOfSize 17 0f           Values are fractional -- you should take the ceil to get equivalent values CGSize adjustedSize   CGRectIntegral rawRect  size

User · Answer

I created a category to handle this problem  here it is     import  NSString StringSizeWithFont h    implementation NSString  StringSizeWithFont   -  CGSize  sizeWithMyFont  UIFont   fontToUse       if   self respondsToSelector  selector sizeWithAttributes                   NSDictionary  attribs     NSFontAttributeName fontToUse           return   self sizeWithAttributes attribs              return   self sizeWithFont fontToUse        This way you only have to find replace sizeWithFont  with sizeWithMyFont  and you re good to go

User · Answer

Alternate solution-  CGSize expectedLabelSize  if   subTitle respondsToSelector  selector sizeWithAttributes           expectedLabelSize    subTitle sizeWithAttributes   NSFontAttributeName subTitleLabel font     else      expectedLabelSize    subTitle sizeWithFont subTitleLabel font constrainedToSize subTitleLabel frame size lineBreakMode NSLineBreakByWordWrapping

User · Answer

boundingRectWithSize options attributes context

User · Answer

In iOS7 I needed the logic to return the correct height for the tableview heightForRowAtIndexPath method  but the sizeWithAttributes always returns the same height regardless of the string length because it doesn t know that it is going to be put in a fixed width table cell   I found this works great for me and calculates the correct height taking in consideration the width for the table cell   This is based on Mr  T s answer above   NSString  text     The text that I want to wrap in a table cell    CGFloat width   tableView frame size width - 15 - 30 - 15     tableView width - left border width - accessory indicator - right border width UIFont  font    UIFont systemFontOfSize 17   NSAttributedString  attributedText     NSAttributedString alloc  initWithString text attributes   NSFontAttributeName  font    CGRect rect    attributedText boundingRectWithSize  CGSize  width  CGFLOAT MAX                                             options NSStringDrawingUsesLineFragmentOrigin                                            context nil   CGSize size   rect size  size height   ceilf size height   size width    ceilf size width   return size height   15     Add a little more padding for big thumbs and the detailText label

User · Answer

-  CGSize  sizeWithMyFont  UIFont   fontToUse       if   self respondsToSelector  selector sizeWithAttributes                   NSDictionary  attribs     NSFontAttributeName fontToUse           return   self sizeWithAttributes attribs              return   self sizeWithFont fontToUse

User · Answer

CGSize maximumLabelSize   CGSizeMake label frame size width  FLT MAX   CGSize expectedLabelSize    label sizeThatFits maximumLabelSize   float heightUse   expectedLabelSize height

[objective-c] Replacement for deprecated sizeWithFont: in iOS 7?

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