Called to notify the view controller that its view is about to layout its subviews.
SDKs
Framework
func viewWillLayoutSubviews()
When a view's bounds change, the view adjusts the position of its subviews. Your view controller can override this method to make changes before the view lays out its subviews. The default implementation of this method does nothing.
var edgesThe edges that you extend for your view controller.
struct UIRectConstants that specify the edges of a rectangle.
var extendedA Boolean value indicating whether or not the extended layout includes opaque bars.
func viewCalled to notify the view controller that its view has just laid out its subviews.
func updateCalled when the view controller's view needs to update its constraints.