确保函数仅在主线程上运行 [英] Make sure function runs on main thread only

问题描述

如何确保我的功能仅在主线程上运行？ （它更新UI元素）

这样的函数被认为是坏吗？

How can I make sure that my function is run only on the main thread? (It updates UI elements)
Is a function like this considered 'bad'?

-(void)updateSomethingOnMainThread {
if ( ![[NSThread currentThread] isEqual:[NSThread mainThread]] )
    [self performSelectorOnMainThread:_cmd withObject:nil waitUntilDone:NO];
else {
    // Do stuff on main thread
}
}

我是这样写的，以避免有第二个功能，最初我有这样的：

I wrote it like this to avoid having a second function, initially I had it like this:

-(void)updateSomethingOnMainThread_real {
    // Do stuff on main thread
}

-(void)updateSomethingOnMainThread {
    [self performSelectorOnMainThread:@selector(updateSomethingOnMainThread_real) withObject:nil waitUntilDone:NO];
}

推荐答案

这很好。您也可以使用GCD在主线程上执行代码。

This is fine. You can also use GCD to execute code on the main thread.

查看此SO帖子。

GCD在主线程中执行任务

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