由于button是系统样式,把button换成自定义样式就可以解决问题
代码:
-(void)startTime{
__block int timeout= 60; //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(), ^{
[_getIdentifyBtn setTitle:@"重新发送验证码" forState:UIControlStateNormal];
_getIdentifyBtn.userInteractionEnabled = YES;
});
}else{
dispatch_async(dispatch_get_main_queue(), ^{
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:1];
[_getIdentifyBtn setTitle:[NSString stringWithFormat:@"%zd秒后重新发送",timeout] forState:UIControlStateNormal];
[UIView commitAnimations];
_getIdentifyBtn.userInteractionEnabled = NO;
});
timeout--;
}
});
dispatch_resume(_timer);
}