Cancels perform requests previously registered with perform.
SDKs
- iOS 2.0+
- macOS 10.0+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
Framework
- Foundation
Declaration
+ (void)cancelPreviousPerformRequestsWithTarget:(id)aTarget selector:(SEL)aSelector object:(id)anArgument;
Parameters
aTargetThe target for requests previously registered with the
performinstance methodSelector: with Object: after Delay: aSelectorThe Selector for requests previously registered with the
performinstance method.Selector: with Object: after Delay: anArgumentThe argument for requests previously registered with the
performinstance method. Argument equality is determined usingSelector: with Object: after Delay: is, so the value need not be the same object that was passed originally. PassEqual: nilto match a request fornilthat was originally passed as the argument.
Discussion
All perform requests are canceled that have the same target as a, argument as an, and selector as a. This method removes perform requests only in the current run loop, not all run loops.