问题 If I set textLayer.wrapped = YES , how do I resize textLayer to contain the wrapped text? I.e., how do I get the new height of the textLayer ? Basically, I want something like -[UILabel sizeToFit] . 回答1: The first thing you need to do is get the size of the text. Thankfully, the NSString UIKit Additions Reference offers a method to do exactly that: - (CGSize)sizeWithFont:(UIFont *)font constrainedToSize:(CGSize)size lineBreakMode:(UILineBreakMode)lineBreakMode That will give you a CGSize that