iPhone - cancelPerformSelectorWithTarget 不起作用

Question

如果我在 UIView 的子类中执行此操作:

[self performSelector:@selector(doSomething) withObject:nil afterDelay:5];

然后像这样取消它(我已经尝试了两个版本):

 [[NSRunLoop currentRunLoop] cancelPerformSelectorsWithTarget:self];
 //[[NSRunLoop mainRunLoop] cancelPerformSelectorsWithTarget:self];

“doSomething”方法仍然会被调用。我做错了什么？

Answer 1

在 NSObject 类引用中:

cancelPreviousPerformRequestsWithTarget:selector:object:

Cancels perform requests previously registered with performSelector:withObject:afterDelay:.

用途:

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

希望这有帮助。