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我'上的不同对象执行cancelPreviousPerformRequestsWithTarget:选择:对象:所有对象
[self performSelector:@selector(doSmth) withObject:objectA afterDelay:1];
[self performSelector:@selector(doSmth) withObject:objectB afterDelay:1];
[self performSelector:@selector(doSmthElse) withObject:objectA afterDelay:1];
调度不同的选择,我想取消所有“doSmth”,那怎么办?不知道对象传递
这将取消一切
[NSObject cancelPreviousPerformRequestsWithTarget:self];
,这将取消任何操作(如对象不匹配)
[NSObject cancelPreviousPerformRequestsWithTarget:object
selector:@selector(doSmth) object:nil];
即使我想除了行为是(取消任何对象,当零通过,但这不会发生)