Open Radar

 
Summary:

If an attributed string contains both a font attribute as well as a paragraph style attribute that sets minimum/maximum line height those line height constraints are ignored.

Steps to Reproduce:

Create an attributed string that contains a font and paragraph style attribute. Make sure the paragraph style attribute sets a minimum and maximum line height that is less than the font line height.
Set this attributed string on a UITextView's attributedString property.

Expected Results:

The lines should be spaced by the amount of the specified minimum/maximum.

Actual Results:

The lines are spaced as they would be without the paragraph style settings.

Regression:

UITextView only supports attributed strings since iOS 6. Since then this is broken.

Notes:

The problem seems to result if you have multiple different fonts, like when you have some bold or italic text in the string.