如何获取 NSString 的宽度? [英] How to get the width of an NSString?

问题描述

我正在尝试获取 NSString 的宽度(例如 NSString *myString = @"hello").有没有办法做到这一点?

I am trying to get the width of an NSString (ex. NSString *myString = @"hello"). Is there a way to do this?

谢谢.

推荐答案

这里有一个相对简单的方法.只需使用适当的字体创建一个 NSAttributedString 并询问其大小:

Here's a relatively simple approach. Just create an NSAttributedString with the appropriate font and ask for its size:

- (CGFloat)widthOfString:(NSString *)string withFont:(NSFont *)font {
     NSDictionary *attributes = [NSDictionary dictionaryWithObjectsAndKeys:font, NSFontAttributeName, nil];
     return [[[NSAttributedString alloc] initWithString:string attributes:attributes] size].width;
 }

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