现在的App都用手机验证码登录了，各种使用按钮做60s倒计时，我这里正好有一个之前用过的，来搞一搞事情
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+(void)countDownWith:(UIButton *)sender telNumber:(NSString *)telNumber smsType:(NSString *)smsType block:(void(^)(NSString *verifyCode))block{ sender.userInteractionEnabled = NO; // 发送手机号 并发送验证码 //这里写请求 [request callVerifyback:^(SKResponse *response) { __block int timeout=59; //倒计时时间 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); //每秒执行 dispatch_source_set_event_handler(_timer, ^{ if(timeout<=0){ //倒计时结束，关闭 dispatch_source_cancel(_timer); dispatch_async(dispatch_get_main_queue(), ^{ //设置界面的按钮显示 根据自己需求设置 // [sender setBackgroundColor:setRGBColor(255, 204, 1)]; [sender setTitle:@"获取验证码" forState:UIControlStateNormal]; sender.userInteractionEnabled = YES; }); }else{ int seconds = timeout % 60; NSString *strTime = [NSString stringWithFormat:@"%.2d", seconds]; dispatch_async(dispatch_get_main_queue(), ^{ // [sender setBackgroundColor:[UIColor lightGrayColor]]; [sender setTitle:[NSString stringWithFormat:@"已发送 %@s",strTime] forState:UIControlStateNormal]; }); timeout--; } }); dispatch_resume(_timer); //[SVProgressHUD showSuccessWithStatus:response.data[@"code"]]; block([response.data objectForKey:@"code"]); } error:^(NSString *errorMsg) { sender.userInteractionEnabled = YES; }]; } |
按钮的搞定，那其他的控件也是可以的咯，改一改用起来咯！比如现在我要做一个倒计时的label，而且label上面的文字要有缩放效果，那就这样改
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+ (void)countDownWith:(UILabel *)sender block:(void(^)())block{ sender.userInteractionEnabled = NO; __block int timeout=5; //倒计时时间 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); //每秒执行 dispatch_source_set_event_handler(_timer, ^{ if(timeout<=0){ //倒计时结束，关闭 dispatch_source_cancel(_timer); dispatch_async(dispatch_get_main_queue(), ^{ //设置界面的按钮显示 根据自己需求设置 [sender removeFromSuperview]; }); }else{ int seconds = timeout % 60; NSString *strTime = [NSString stringWithFormat:@"%d", seconds]; dispatch_async(dispatch_get_main_queue(), ^{ sender.text = strTime; sender.alpha = 1; sender.transform = CGAffineTransformIdentity; [UIView animateWithDuration:0.7 animations:^{ CGAffineTransform newTransform = CGAffineTransformScale(sender.transform, 2, 2);//2,2表示放大的大小 sender.transform = newTransform; } completion:^(BOOL finished) { [UIView animateWithDuration:0.3 animations:^{ sender.alpha = 0.3; } completion:^(BOOL finished) { }]; }]; }); timeout--; } }); dispatch_resume(_timer); } |
就是这么简单！
