按钮倒计时

最新推荐文章于 2024-10-26 18:28:23 发布

转载最新推荐文章于 2024-10-26 18:28:23 发布 · 424 阅读

本文详细介绍了如何使用Objective-C实现倒计时功能，并在实际应用中展示其使用场景和效果。

//#pragma mark - button countdown(倒计时)
//
//- (void)startTimer:(UIButton *)codeButton
//{
//    __block int timeout = 59;
//    dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
//    dispatch_source_t _timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0,queue);
//    dispatch_source_set_timer(_timer,dispatch_walltime(NULL, 0),1.0*NSEC_PER_SEC, 0);
//    dispatch_source_set_event_handler(_timer, ^{
//        if(timeout<=0){
//            dispatch_source_cancel(_timer);
//            dispatch_async(dispatch_get_main_queue(), ^{
//                [codeButton setTitle:@"发送验证码" forState:UIControlStateNormal];
//                codeButton.userInteractionEnabled = YES;
//            });
//        }else{
//            int seconds = timeout % 60;
//            NSString *strTime = [NSString stringWithFormat:@"%.2d", seconds];
//            dispatch_async(dispatch_get_main_queue(), ^{
//                [codeButton setTitle:[NSString stringWithFormat:@"%@秒后重发",strTime] forState:UIControlStateNormal];
//                codeButton.userInteractionEnabled = NO;
//
//            });
//            timeout--;
//        }
//    });
//    dispatch_resume(_timer);
//}