How to get height for NSAttributedString at a fixed width

Question

I want to do some drawing of NSAttributedStrings in fixed-width boxes, but am having trouble calculating the right height they\'ll take up when drawn. So far, I\'ve tried:

Answer 1

On OS X 10.11+, the following method works for me (from Apple's Calculating Text Height document)

- (CGFloat)heightForString:(NSAttributedString *)myString atWidth:(float)myWidth
{
    NSTextStorage *textStorage = [[NSTextStorage alloc] initWithAttributedString:myString];
    NSTextContainer *textContainer = [[NSTextContainer alloc] initWithContainerSize:
        NSMakeSize(myWidth, FLT_MAX)];
    NSLayoutManager *layoutManager = [[NSLayoutManager alloc] init];
    [layoutManager addTextContainer:textContainer];
    [textStorage addLayoutManager:layoutManager];
    [layoutManager glyphRangeForTextContainer:textContainer];
    return [layoutManager
        usedRectForTextContainer:textContainer].size.height;
}