Cocoa get string width in pixels from font

Question

Hey guys, I am trying to find the width in pixels of a string from the font and font size. I am currently using this code, but it is not working 100% of the time. Is there another way to do it?

NSSize textSize = [aTextLayer.string sizeWithAttributes:[NSDictionary dictionaryWithObjectsAndKeys:@"Bank Gothic Medium", NSFontNameAttribute, [NSNumber numberWithFloat:aTextLayer.fontSize], NSFontSizeAttribute, nil]];

Answer 1

NSAttributedString is granted a -size method by the Application Kit Additions.

NSDictionary* attributes = [NSDictionary dictionaryWithObjectsAndKeys:
    @"Bank Gothic Medium", NSFontNameAttribute,
    [NSNumber numberWithFloat:aTextLayer.fontSize], NSFontSizeAttribute,
    nil];
NSAttributedString* attributedString = [[NSAttributedString alloc] initWithString:aTextLayer.string attributes:attributes];
NSSize size = attributedString.size;

Answer 2

Try using the actual NSFont (or UIFont) object instead of just the name of the font.