采用多个参数performSelectorOnMainThread [英] performSelectorOnMainThread with multiple parameter

问题描述

我试图执行主线程上这个动作：

I am trying to perform this action on the main thread:

[curItem.mButton setBackgroundImage:newArt forState:UIControlStateNormal];

所以，我这样做...

So I do this...

cWrapperObject* obj = [cWrapperObject alloc];
[obj setupParams :curItem.mButton :newArt];
[obj performSelectorOnMainThread:@selector(setImageForButton) withObject:nil waitUntilDone:YES];

我觉得这是不好的，没有任何人对我怎么能处理这有什么建议不同？

I feel like this is bad, does anyone has any suggestions on how I could approach this differently?

推荐答案

另一种选择是GCD。您可以调用运行循环运行时，它获取连续运行主队列块。块不限于一个对象像performSelectorOnMainThread

Another option is GCD. You can invoke a block on the main queue which gets run serially when the run loop runs. blocks aren't limited to one object like performSelectorOnMainThread.

dispatch_async(dispatch_get_main_queue(), ^{
   // code here
});

我写performSelectorXXX和GCD与样品完全在这里的多个COM prehensive比较：

I wrote a more comprehensive comparison of performSelectorXXX and GCD here complete with samples:

<一个href=\"http://stackoverflow.com/questions/7290931/gcd-threads-program-flow-and-ui-updating/7291056#7291056\">GCD,线程程序流和用户界面更新

此外，这里是另一个相关的SO职位：

Also, here's another related SO post:

GCD执行在主线程任务

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