Lines missing from tall UILabel when embedding NSTextAttachment

Question

I can create a multi-line NSAttributedString by using escaped new-line characters (@\"\\n\"). With iOS 7, I can now embed a UIImage in

Answer 1

I have found another workaround for this bug, which is sufficiently different from my previous answer that I'm providing it as another answer: let the label set its own height.

In this code, I'm removing the height constraint from a label with a fixed width constraint, and replacing it with a greater-than height constraint (and I'm sure there are other ways to achieve the same outcome):

[self.lab removeConstraint:self.labelHeight];
[self.lab addConstraint:
 [NSLayoutConstraint constraintWithItem:self.lab 
 attribute:NSLayoutAttributeHeight 
 relatedBy:NSLayoutRelationGreaterThanOrEqual 
 toItem:nil attribute:0 multiplier:1 constant:20]];

That label displays correctly every attributed string I throw at it! Of course, you lose the automatic vertical centering of the string, but that's the whole source of the bug, so losing it is not so terrible.