标签：auth auto handler 显示 pen oba origin cti countdown
验证码倒计时按钮的应用是非常普遍的，本文介绍了IOS实现验证码倒计时功能，点击获取验证码，进入时间倒计时，感兴趣的小伙伴们可以参考一下
// 开启倒计时效果
-(void)openCountdown{
__block NSInteger time = 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(time <= 0){ //倒计时结束，关闭
dispatch_source_cancel(_timer);
dispatch_async(dispatch_get_main_queue(), ^{
//设置按钮的样式
[self.authCodeBtn setTitle:@"重新发送" forState:UIControlStateNormal];
[self.authCodeBtn setTitleColor:[UIColor colorFromHexCode:@"FB8557"] forState:UIControlStateNormal];
self.authCodeBtn.userInteractionEnabled = YES;
});
}else{
int seconds = time % 60;
dispatch_async(dispatch_get_main_queue(), ^{
//设置按钮显示读秒效果
[self.authCodeBtn setTitle:[NSString stringWithFormat:@"重新发送(%.2d)", seconds] forState:UIControlStateNormal];
[self.authCodeBtn setTitleColor:[UIColor colorFromHexCode:@"979797"] forState:UIControlStateNormal];
self.authCodeBtn.userInteractionEnabled = NO;
});
time--;
}
});
dispatch_resume(_timer);
}
在按钮的点击事件里调用该方法.
我们在创建Button时, 要设置Button的样式:
当type为: UIButtonTypeCustom时 , 是读秒的效果.
当type为: 其他时, 是一闪一闪的效果.
标签：auth auto handler 显示 pen oba origin cti countdown
原文地址：http://www.cnblogs.com/lxlx1798/p/7589357.html
