CODEWITHSUNDEEP
iphoneiosobjective-cipadnsstring
evenstephen
evenstephen

Reputation: 75

Height when using sizeWithFont:constrainedToSize:lineBreakMode with NSLineBreakByTruncatingTail

When I run the following code (iOS 6.1 SDK):

UIFont *font = [UIFont fontWithName:@"Avenir" size:12.0];

NSString *text1 = @"Short Label";
NSString *text2 = @"Long Label Whose Text Will Be Truncated Because It Is Too Long For The View";

CGSize text1Size = [text1 sizeWithFont:font 
                     constrainedToSize:
                            CGSizeMake(self.view.frame.size.width, CGFLOAT_MAX) 
                         lineBreakMode:NSLineBreakByTruncatingTail];
CGSize text2Size = [text2 sizeWithFont:font 
                     constrainedToSize:
                            CGSizeMake(self.view.frame.size.width, CGFLOAT_MAX) 
                         lineBreakMode:NSLineBreakByTruncatingTail];

NSLog(@"Text 1 Size: %f %f", text1Size.width, text1Size.height);
NSLog(@"Text 2 Size: %f %f", text2Size.width, text2Size.height);

The log output is:

Text 1 Size: 62.000000 17.000000
Text 2 Size: 300.000000 34.000000

Why are the heights different, here? In either case, it's one line of text; just one is truncated, the other is not.

Thanks!

Upvotes: 2

Views: 690

Answers (1)

rdelmar
rdelmar

Reputation: 104092

The height is different because you gave it CGFLOAT_MAX as the height, so the method tries to figure out what size the text will be by breaking the text into multiple lines. In this case, apparently, two lines will be enough to contain that string in the width supplied.

Upvotes: 4

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