ios - What is a 'UIView-Encapsulated-Layout-Width' constraint?

Question

I keep getting 'Unable to simultaneously satisfy constraints' exceptions (Xcode 5, iOS 7, both device and simulator), where one of the constraints in the list is something like this:

"<NSLayoutConstraint:0x165b23d0 'UIView-Encapsulated-Layout-Width'
H:[StoryPlayerCell:0x165affc0(0)]>"

I did not set this constraint myself. It's also not an NSAutoresizingMaskLayoutConstraint. But where does it come from? And how can I get rid of it?

I have no idea. And I can't find anything about 'UIView-Encapsulated-Layout-Width' in the Apple's documentation. Even the Google search returns nothing at all.

Any suggestions?

PS: I'm using this cell in a UICollectionView with a custom subclass of UICollectionViewFlowLayout. Maybe the 'Encapsulated-Layout' part has something to do with this?

Answer 1

A quick and nice fix, is to assign 999 priority value to the custom constraints with high priority. The encapsulated & auto-generated constraints should dominate with higher priority than your constraints.

https://stackoverflow.com/a/25795758/590010