…tical and horizontal constraints to lower priority. It depends what axis of an UIStackView you use. If horizontal, you have to update the leading, and trailing constraints priority of your arranged subviews. If vertical, you have to update the top and bottom constraints priority of your arranged subviews. 999 is enough and will let the UIStackView work smoothly. What UIStackView does behind the scenes, is that it adds 1000 priority constraints to its arranged …
noescape was an attribute in swift 2. This is deprecated from swift 3. The
@noescape attribute is applied by default in Swift 3. Because closures are by default non-escaping in Swift 3, escaping closures need to be marked as such. And the
@escaping attribute lets us do that.