冻结屏幕与调度

Question

我使用此代码并冻结屏幕。为什么会这样？

__block double delayInSeconds = 1.0;
dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, delayInSeconds * NSEC_PER_SEC);
dispatch_after(popTime, dispatch_get_main_queue(), ^(void){

    if ([self loginTypeIsUser])
    {
        [self getVideoPlayLinksForEntity:wallpostEntity];
    }
}); 

Answer 1

这是因为您正在锁定主线程。你不应该dispatch_get_main_queue()，而是在后台进行。

尝试：

dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_LOW, 0)

或

dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0)