iOS 如何获取后台调度队列完成状态
<p><p>我已经创建了一个这样的队列</p>
<pre><code>dispatch_queue_t myBackgroundQueue;
myBackgroundQueue = dispatch_queue_create("com.google.task", NULL);
dispatch_async(myBackgroundQueue, ^(void) {
});
</code></pre>
<p>这将在按钮单击时调用,我想知道当前的后台运行队列。谢谢</p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><pre><code> dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
BOOL ok = // some result
// do some long running processing here
// Check that there was not a nil handler passed.
if( completionHandler )
{
// This assumes ARC. If no ARC, copy and autorelease the Block.
[completionHandler performSelector:@selector(rmaddy_callBlockWithBOOL:)
onThread:origThread
withObject:@(ok) // or
waitUntilDone:NO];
}
});
});
</code></pre></p>
<p style="font-size: 20px;">关于iOS 如何获取后台调度队列完成状态,我们在Stack Overflow上找到一个类似的问题:
<a href="https://stackoverflow.com/questions/38848550/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/38848550/
</a>
</p>
页:
[1]