1、view
[self performselectorinbackground:@selector(thread) withobject:nil];
- (void)thread { for(int i=300;i>=0;i--) { _count = i; // 回调主线程 [self performselectoronmainthread:@selector(mainthread) withobject:nil waituntildone:yes]; sleep(1); } } // 此函数主线程执行 - (void)mainthread { self.time.text=[nsstring stringwithformat:@"%d",_count]; if (_count==0) { } }
如对本文有疑问, 点击进行留言回复!!
Codeforces Round #657 (Div. 2) C题
hdu2222 Keywords Search(ac自动机模板-kuangbin)
网友评论