How to get NSString size when NSString includes emojis?

Question

I am currently using

- (CGSize)sizeWithFont:(UIFont *)font constrainedToSize:(CGSize)size lineBreakMode:(UILineBreakMode)lineBreakMode

to

Answer 1

The NSString is not presenting the emoji, it's representing a string, so the sizeWithFont will only account for the string.

I would use:

CGRect labelFrame = label.frame;  
labelFrame.size = [label sizeThatFits:CGSizeMake(100, 9999)];  
[label setFrame:labelFrame]; 

or

//Alternatively  
[label sizeToFit];

Bare in mind that sizeToFit calls the sizeThatFits: method, so in terms of just setting the label to the right height, sizeThatFits: is quicker, and much easier on the eye.

Answer 2

I struggled with this same thing for a while, attempting multiple solutions including the accepted answer, which did not work for me. I solved this by creating an NSAttributed String with the text, then using the NSAttributedString method boundingRectWithSize:options:context: to get the size of the string.

NSString *text = //some text
CGFloat maxSize = //text size constraints

NSAttributedString *attributedString = [[NSAttributedString alloc] initWithString:text
                                                                       attributes:@{NSFontAttributeName : font
                                                                                    }];

CGRect boundingRect = [attributedString boundingRectWithSize:maxSize options:NSStringDrawingUsesLineFragmentOrigin context:nil];
CGSize fitSize = boundingRect.size;