Overridden by subclasses to perform additional actions before subviews are removed from the view.
SDK
Framework
func willRemoveSubview(_ subview: NSView)
subviewThe subview that will be removed.
This method is invoked when subview receives a remove message or subview is removed from the view due to it being added to another view with add.
var superview: NSView?The view that is the parent of the current view.
var subviews: [NSView]The array of views embedded in the current view.
var window: NSWindow?The view’s window object, if it is installed in a window.
func addAdds a view to the view’s subviews so it’s displayed above its siblings.
func addInserts a view among the view’s subviews so it’s displayed immediately above or below another view.
func didOverridden by subclasses to perform additional actions when subviews are added to the view.
func removeUnlinks the view from its superview and its window, removes it from the responder chain, and invalidates its cursor rectangles.
func removeUnlinks the view from its superview and its window and removes it from the responder chain, but does not invalidate its cursor rectangles to cause redrawing.
func replaceReplaces one of the view’s subviews with another view.
func isReturns true if the view is a subview of a given view or if it’s identical to that view; otherwise, it returns false.
var opaqueThe view’s closest opaque ancestor, which might be the view itself.
func ancestorReturns the closest ancestor shared by the view and another specified view.
func sortOrders the view's immediate subviews using the specified comparator function.
func viewInforms the view that its superview has changed (possibly to nil).
func viewInforms the view that it has been added to a new view hierarchy.
func viewInforms the view that its superview is about to change to the specified superview (which may be nil).
func viewInforms the view that it’s being added to the view hierarchy of the specified window object (which may be nil).
var enclosingThe menu item containing the view or any of its superviews in the view hierarchy.