Stops the timer from ever firing again and requests its removal from its run loop.
SDKs
- iOS 2.0+
- macOS 10.0+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
Framework
- Foundation
Declaration
func invalidate()
Discussion
This method is the only way to remove a timer from an Run object. The Run object removes its strong reference to the timer, either just before the invalidate() method returns or at some later point.
If it was configured with target and user info objects, the receiver removes its strong references to those objects as well.
Special Considerations
You must send this message from the thread on which the timer was installed. If you send this message from another thread, the input source associated with the timer may not be removed from its run loop, which could prevent the thread from exiting properly.