NSRunLoop收到一个奇怪的选择器.可能的种族条件假装? [英] NSRunLoop is receiving a strange selector; possible race condition tomfoolery?

问题描述

当我的主线程处理UI内容时，我有一些线程在做繁重的工作.线程有时会回调到主线程以更新进度条.

I've got some threads doing heavy work while my main thread handles the UI stuff. The threads callback to the main thread at times to update a progress bar.

总而言之，它并不那么稳定.我已经解决了与逻辑有关的问题，但是特别是仍然存在.我有一些充当停止按钮的代码，这意味着该线程不会在下次出现时尝试尝试自我更新.

All in all, it's not that stable. I've fixed problems relating to the logic, but one in particular persists. I've got some code that acts like a stop button, meaning that the thread won't try and renew itself the next time it comes around to check what's going on.

有时候，当我按下停止按钮时，我会收到此错误:

Sometimes, when I press the stop button, I receive this error:

-[NSRunLoop isEnabled]:无法识别的选择器已发送到实例...

-[NSRunLoop isEnabled]: unrecognized selector sent to instance...

如果我在线程工作阶段结束时按下停止"按钮，似乎会发生这种情况.在这段时间里，除了:

It seems to happen if I hit the stop button towards the end of the thread's work phase. During this time, it doesn't do much except:

• 释放一些OpenGL内存
• 在主线程上调用最终方法
• 排空自动释放池
• 然后返回

但是坦率地说，错误消息对于我来说太神秘了，甚至不知道从哪里开始.任何人都可以对NSRunLoop，这个'isEnabled'方法可能是什么，或者是对可能出了什么问题的一般刺探有所了解吗?

But frankly, the error message is too cryptic for me to even know where to begin. Can anyone shed some light on NSRunLoop, what this 'isEnabled' method might be, or a general stab at what might be going wrong?

推荐答案

尝试在启用僵尸的情况下运行.如果线程中的一个runloop对象之一被另一个对象破坏并覆盖了，我不会感到惊讶，但是您仍然有一个指向它过去位置的陈旧指针.

Try running with Zombies enabled. I wouldn't be surprised if one of the runloop objects from a thread is getting destroyed and overwritten by another object, but you've still got a stale pointer to where it used to be.

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