iOS - set maximum width for UILabel with Autolayout

Question

I have a UILabel contained in a UIView that has a fixed size. The UILabel has dynamic text. How can I make sure that the UILabel will never get bigger than the containing UIView?

Before using AutoLayout this was quite simple to achieve by simply using the AdjustsFontSizeToFitWidth, but I can't manage to get this working with Autolayout anymore.

What contraints should I add from the UILabel to the UIView? Right now it is simply Leading aligned.

Answer 1

There are special methods for such views like UILabel (contentHugging and contentCompressionResistance), but they are already enabled. So all you need to disable label's width grow to superview's width.

NSLayoutConstraint *widthConstraint = [NSLayoutConstraint constraintWithItem:self.label attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationLessThanOrEqual toItem:self.label.superview attribute:NSLayoutAttributeWidth multiplier:1.0f constant:0.0f];    
[self.label addConstraint:widthConstraint];