Implemented by subclasses to respond to key equivalents (also known as keyboard shortcuts).
- macOS 10.0+
The key-down event object representing a key equivalent.
the is a key equivalent that the view handled,
NO if it is not a key equivalent that it should handle.
If the view’s key equivalent is the same as the characters of the key-down event
the, as returned by
characters, the view should take the appropriate action and return
YES. Otherwise, it should return the result of invoking
super’s implementation. The default implementation of this method simply passes the message down the view hierarchy (from superviews to subviews) and returns
NO if none of the view’s subviews responds