Returns the ordering parameter for a CFRunLoopObserver object.
- iOS 2.0+
- macOS 10.0+
- UIKit for Mac 13.0+Beta
- tvOS 9.0+
- watchOS 2.0+
The run loop observer to examine.
The ordering parameter for
observer. When multiple observers are scheduled in the same run loop mode and stage, this value determines the order (from small to large) in which the observers are called.
CFRunLoopObserver Miscellaneous Functions
Returns a Boolean value that indicates whether a CFRunLoopObserver object is valid and able to fire.
This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.Learn more about using Apple's beta software