objective-c 推迟用法
objective-c 延迟用法
//延迟执行
[self performSelector:@selector(hidenSelf) withObject:nil afterDelay:2];
//取消延迟执行
[[self class] cancelPreviousPerformRequestsWithTarget:self selector:@selector(hidenSelf) object:nil];
//延迟执行
[self performSelector:@selector(hidenSelf) withObject:nil afterDelay:2];
//取消延迟执行
[[self class] cancelPreviousPerformRequestsWithTarget:self selector:@selector(hidenSelf) object:nil];