Question

我正在使用dispatch_async在其他方面做点什么。

dispatch_queue_t backgroundQueue;

在viewDidLoad中：

- (void)viewDidLoad
{
   [super viewDidLoad];
   // Do any additional setup after loading the view.

   backgroundQueue = dispatch_queue_create("dispatchName", NULL);
}

使用它：

dispatch_async(backgroundQueue, ^
{
    // Do something...
});

在我再次调用此方法之前一切正常。该应用程序很容易出错：

2014-09-29 11:34:10.626 hELLO[2785:389790] *** Assertion failure in -[UIKeyboardTaskQueue waitUntilAllTasksAreFinished], /SourceCache/UIKit_Sim/UIKit-3318/Keyboard/UIKeyboardTaskQueue.m:374
2014-09-29 11:34:10.628 hELLO[2785:389790] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: '-[UIKeyboardTaskQueue waitUntilAllTasksAreFinished] may only be called from the main thread.'

Answer 1

您正在尝试执行进程，该进程只能在主线程中执行。将代码放入

dispatch_async(dispatch_get_main_queue(), ^{

})

目标C - 调用dispatch_async显示错误

1 个答案: