AutoLayout: removeFromSuperview / removeConstraints throws exception and crashes hard

Question

We use auto layout constraints selectively, primarily to position labels in relation to editable field elements (UITextView, UITextField, typically). However, since impleme

Answer 1

For anyone encountering this issue in any iOS version > 8.0, the Apple docs state to use the "active" property on the NSLayoutConstraint rather than the removeConstraint/addConstraint functions on UIView. Apple Docs addConstraint reference