displayLink(withTarget:selector:)
Returns a display link object for the current screen.
Declaration
func displayLink(withTarget target: Any, selector sel: Selector) -> CADisplayLink?Parameters
- target:
An object to be notified when the screen should be updated.
- sel:
The method of
targetto call. This selector must have the following signature:- (void)selector:(CADisplayLink *)sender;
Return Value
A newly constructed display link object.
Discussion
You use display link objects to synchronize your drawing code to the screen’s refresh rate. The newly constructed display link retains the target.