相关疑难解决方法(0)

有没有办法检查当前线程是否是Objective-C中的主线程？

我想做这样的事情.

  - (void)someMethod
  {
    if (IS_THIS_MAIN_THREAD?) {
      NSLog(@"ok. this is main thread.");
    } else {
      NSLog(@"don't call this method from other thread!");
    }
  }