Runs the loop once or until the specified date, accepting input only for the specified mode.
- iOS 2.0+
- macOS 10.0+
- UIKit for Mac 13.0+Beta
- tvOS 9.0+
- watchOS 2.0+
The mode in which to run. You may specify custom modes or use one of the modes listed in Run Loop Modes.
The date up until which to run.
If no input sources or timers are attached to the run loop, this method exits immediately; otherwise, it runs the run loop once, returning as soon as one input source processes a message or the specifed time elapses.
Manually removing all known input sources and timers from the run loop is not a guarantee that the run loop will exit. macOS can install and remove additional input sources as needed to process requests targeted at the receiver’s thread. Those sources could therefore prevent the run loop from exiting.