objective-c - 如何在一行代码中写 `performSelectorInBackground: afterDelay:`？

Question

performSelectorInBackground:中有performSelector: afterDelay:和NSObject方法。如何将它们合并为一行代码？
也许以某种方式与NSTimer在一起？

Answer 1

您是否考虑过为此使用块？

double delayInSeconds = 2.0;
dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, delayInSeconds * NSEC_PER_SEC);
dispatch_after(popTime, dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0),
^(void){
    //your code here
});

另外，如果看起来写的太多，则已经有一段代码了，开始输入“dispatch_after”，您会看到它。