使用 performSelector:withObject:afterDelay: 带非对象参数 [英] Using performSelector:withObject:afterDelay: with non-object parameters

问题描述

我想稍微延迟在表视图上调用 setEditing:animated:.通常，我会使用 performSelector:withObject:afterDelay: 但是

I want to invoke setEditing:animated: on a table view with a slight delay. Normally, I'd use performSelector:withObject:afterDelay: but

1. pSwOaD 只接受一个参数
2. setEditing:animated: 的第二个参数是原始 BOOL - 不是对象

1. pSwOaD only accepts one parameter
2. the second parameter to setEditing:animated: is a primitive BOOL - not an object

过去我会在自己的类中创建一个虚拟方法，比如 setTableAnimated 然后调用 [self performSelector:@selector(setTableAnimated) withObject:nil afterDelay:0.1f但我觉得这很笨拙.

In the past I would create a dummy method in my own class, like setTableAnimated and then call [self performSelector:@selector(setTableAnimated) withObject:nil afterDelay:0.1f but that feels kludgy to me.

有更好的方法吗?

推荐答案

为什么不使用 dispatch_queue ?

Why not use a dispatch_queue ?

  double delayInSeconds = 2.0;
  dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, delayInSeconds * NSEC_PER_SEC);
  dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
      [tableView setEditing …];
  });

这篇关于使用 performSelector:withObject:afterDelay: 带非对象参数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！