iPhone如何取消停止性能选择器

[NSObject cancelPreviousPerformRequestsWithTarget:yourTarget selector:aSelector object: anArgument];

我认为这可能对人们看到一些实际的代码很有用,所以这里有两个代码,当我进入另一个屏幕时,我用来停止声音和滑动。

- (void)handleSwipeNext {

    [NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(handleSwipeNext) object:nil];

    [NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(playPromptAndTarget) object:nil];

// do some swipe handling stuff
}

Swift 4.0版本:

NSObject.cancelPreviousPerformRequests(withTarget: self, selector: #selector(yourFunc), object: nil)