iOS的performSelectorOnMainThread与多个参数 [英] iOS performSelectorOnMainThread with multiple arguments

问题描述

我想从另一个线程在主线程中执行一个选择，但选择具有多个参数，与此类似：

I would like to perform a selector on the main thread from another thread, but the selector has multiple arguments, similar to this:

- （无效）doSomethingWith：（INT）A B：（浮点）B C：（浮点）C D：（浮点）D E：（浮点），E {
    // ...
}

我怎样才能得到这个工作 performSelectorOnMainThread：withObject：waitUntilDone：

How can I get this working with performSelectorOnMainThread: withObject: waitUntilDone:?

修改

我想解释一下为什么我需要这个。

I would like to explain why i need this.

我在主线程上的UIImageViews工作，我为他们计算在另一个线程。我用了很多的计算，所以如果我在主线程使一切，应用滞后。我知道，UI元素只能在主线程上被操纵，这就是为什么我想它这样的工作方式，因此主线程可以听触摸事件没有延迟。

I'm working with UIImageViews on the main thread, and I make the calculations for them on another thread. I use a lot of calculations so if i make everything on the main thread, the app lags. I know that UI elements can only be manipulated on the main thread, this is why i would like it to work this way, so the main thread can listen to touch events without lags.

推荐答案

当你使用的是iOS> = 4，你应该这样做，而不是：

When you're using iOS >= 4, you'd do this instead:

dispatch_async(dispatch_get_main_queue(), ^{
    [self doSomething:1 b:2 c:3 d:4 e:5];
});

这就像做 waitUntilDone：NO 。如果你要等到该方法完成后，使用 dispatch_sync 代替。

That's like doing waitUntilDone:NO. If you want to wait until the method is finished, use dispatch_sync instead.

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