Adds a view to the view’s subviews so it’s displayed above its siblings.
- macOS 10.0+
The view to add to the view as a subview.
This method also sets the view as the next responder of
The view retains
a. If you use
remove to remove
a from the view hierarchy,
a is released. If you want to keep using
a after removing it from the view hierarchy (if, for example, you are swapping through a number of views), you must retain it before invoking