// _CountdownTime 倒计时总时间;
//_timer 定时器
- (void)startTime:(UIButton *)VerificationCodeButton
{
__block NSInteger timeout = [_CountdownTime integerValue];
dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
_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(), ^{
[VerificationCodeButton setTitle:@"重新获取" forState:UIControlStateNormal];
VerificationCodeButton.userInteractionEnabled = YES;
VerificationCodeButton.alpha = 1.0;
VerificationCodeButton.backgroundColor = [UIColor whiteColor];
});
} else {
NSString *strTime = [NSString stringWithFormat:@"%lds", (long)timeout];
dispatch_async(dispatch_get_main_queue(), ^{
[VerificationCodeButton setTitle:strTime forState:UIControlStateNormal];
VerificationCodeButton.userInteractionEnabled = NO;
VerificationCodeButton.backgroundColor = [UIColor lightTextColor];
});
timeout--;
}
});
dispatch_resume(_timer);
}