Creating a string that has custom kerning letter spacing

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NSAttributedString (and its mutable sibling NSMutableAttributedString) allows you to create strings that are complex in their appearance to the user.

A common application is to use this to display a string and adding custom kerning / letter-spacing.

This would be achieved as follows (where label is a UILabel), giving a different kerning for the word “kerning”

Swift

var attributedString = NSMutableAttributedString("Apply kerning")
attributedString.addAttribute(attribute: NSKernAttributeName, value: 5, range: NSMakeRange(6, 7))
label.attributedText = attributedString

Objective-C

NSMutableAttributedString *attributedString;
attributedString = [[NSMutableAttributedString alloc] initWithString:@"Apply kerning"];
[attributedString addAttribute:NSKernAttributeName value:@5 range:NSMakeRange(6, 7)];
[label setAttributedText:attributedString];

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