当文本有多行时，在UILabel中查找属性文本的宽度

Question

I have multiline attributed text in a UILabel that I would like to find the width of. The purpose of this is to resize the font size for different devices. To do this I check whether the text with line breaks will fit a given space. I have tried text.size.width , however this will give the width as if the text is taking up one line.

Answer 1

Try this solution:

Here we get the size the entire NSAttributedString

 CGRect paragraphRect =
      [attributedText boundingRectWithSize:CGSizeMake(300.f, CGFLOAT_MAX)
      options:(NSStringDrawingUsesLineFragmentOrigin|NSStringDrawingUsesFontLeading)
      context:nil];

You can then use it to find the width of the NSAttributedString Hope this helps you out.