What exactly is UIFont's point size?

Question

I am struggling to understand exactly what the point size in UIFont means. It\'s not pixels and it doesn\'t appear to be the standard definition of point which

Answer 1

I am not sure how -[NSString sizeWithFont:] measures the height. Does it use line height or the difference between the peaks of the beziers? What text did you use?

I believe -[UIFont lineHeight] would be better to measure the height.

Edit: Also, note that none of the measurement methods returns the size in pixels. It returns the size in points. You have to multiply the result by [UIScreen mainScreen].scale.

Note the difference between typographic points used when constructing the font and points from iOS default logical coordinate space. Unfortunately, the difference is not explained very clearly in the documentation.