How to obtain adjusted font size from UILabel when adjustsFontSizeToFitWidth is YES in iOS 7?

Question

I have a label that is set to adjustsFontSizeToFitWidth = YES and I need to get the actual displayed font size.

Now iOS 7 deprecated all methods that worked previously and all questions on SO suggest using these deprecated methods.

I will make this question a bounty as soon as I am allowed to by SO. Please do not close.

The problem is discussed here and has answers! http://stackoverflow.com/questions/2396715/how-to-figure-out-the-font-size-of-a-uilabel-when-adjustsfontsizetofitwidth-is — katleta3000, Sep 30 '15 at 19:27

score 0 · Answer 1 · edited Apr 10 '20 at 07:13

UILabel displayed fontSize in case of using adjustsFontSizeToFitWidth in iOS 7

UILabel *label=[[UILabel alloc]initWithFrame:CGRectMake(0, 0, 100, 40)];
label.text = @" Your Text goes here into this label";
label.adjustsFontSizeToFitWidth = YES;

NSMutableAttributedString *attrStr = [[NSMutableAttributedString alloc] initWithAttributedString:label.attributedText];
// Get the theoretical font-size
[attrStr setAttributes:@{NSFontAttributeName:label.font} range:NSMakeRange(0, attrStr.length)];

NSStringDrawingContext *context = [NSStringDrawingContext new];
context.minimumScaleFactor = label.minimumScaleFactor;
[attrStr boundingRectWithSize:label.frame.size options:NSStringDrawingUsesLineFragmentOrigin context:context];
CGFloat theoreticalFontSize = label.font.pointSize * context.actualScaleFactor;

NSLog(@"theoreticalFontSize: %f",theoreticalFontSize);
NSLog(@"AttributedString Width: %f", [attrStr size].width);
double scaleFactor=label.frame.size.width/([attrStr size].width);
double displayedFontSize=theoreticalFontSize*scaleFactor;
NSLog(@"Actual displayed Font Size: %f",displayedFontSize);

// Verification of Result
double verification=(displayedFontSize * [attrStr length]);
NSLog(@"Should be equal to %0.5f: %0.5f ", [attrStr size].width/17.0, label.frame.size.width/displayedFontSize);

score -1 · Answer 2 · answered Nov 16 '15 at 19:48

-1

Try inserting [lblObj sizeToFit] just before requesting the font size

answered Nov 16 '15 at 19:48

dpigera

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score -2 · Answer 3 · answered Oct 06 '13 at 21:45

-2

There's a readonly property that lets you do that. You can access it like this

nameLabel.adjustsFontSizeToFitWidth = YES;

//Make sure to use the line below AFTER the line above

float fontSize = nameLabel.font.xHeight;

This will give you the font size after it has been adjusted to fit width.

answered Oct 06 '13 at 21:45

Amit

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-1 This answer is incorrect. Have a look at this blog: http://www.cocoanetics.com/2010/02/understanding-uifont/ —xHeight and all the other metrics of UIFont still only reflect the original font size. – daveMac Apr 29 '14 at 14:45

score -2 · Answer 4 · edited Aug 06 '14 at 12:55

-2

You can get the font size of UILabel text using these line of code.

UILabel *lblObj = [[UILabel alloc]init];
lblObj.text = @" Your Text";
lblObj.adjustsFontSizeToFitWidth = YES;
float size = lblObj.font.pointSize; //Here You will get the actual size of the text.
float lineHeight = lblObj.font.lineHeight;

Try this one.

edited Aug 06 '14 at 12:55

Rajesh

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answered Aug 06 '14 at 12:31

Gautam Sareriya

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On iOS 8, `float size = lblObj.font.pointSize` gives me the requested font size, not the actual displayed font size. – Ian Howson Apr 14 '15 at 04:36

How to obtain adjusted font size from UILabel when adjustsFontSizeToFitWidth is YES in iOS 7?

4 Answers4