iPhone - cancelPerformSelectorWithTarget不起作用 [英] iPhone - cancelPerformSelectorWithTarget not working
本文介绍了iPhone - cancelPerformSelectorWithTarget不起作用的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
如果我在UIView的子类中执行此操作：
If I do this in a subclass of UIView:
[self performSelector:@selector(doSomething) withObject:nil afterDelay:5];
然后取消它（我已尝试过两个版本）：
Then cancel it like this (I've tried both versions):
[[NSRunLoop currentRunLoop] cancelPerformSelectorsWithTarget:self];
//[[NSRunLoop mainRunLoop] cancelPerformSelectorsWithTarget:self];
doSomething方法仍然被调用。我做错了什么？
The "doSomething" method still gets called. What am I doing wrong?
推荐答案
在NSObject类中引用：
In the NSObject class reference:
cancelPreviousPerformRequestsWithTarget：selector：object：
取消先前使用$ b $注册
的请求b performSelector：withObject：afterDelay：。
Cancels perform requests previously registered with performSelector:withObject:afterDelay:.
使用：
[NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(doSomething) object:nil];
希望这会有所帮助。
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