ios 简单的倒计时验证码数秒过程实现

时间：2014-11-26 20:32:57 阅读：258 评论：0 收藏：0 [点我收藏+]

timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(timerFireMethod:) userInfo:nil repeats:YES];

//倒计时方法验证码实现倒计时60秒，60秒后按钮变换开始的样子
-(void)timerFireMethod:(NSTimer *)theTimer {
if (seconds == 1) {
[theTimer invalidate];
seconds = 60;
[validCodeBtn_ setTitle:@"获取验证码" forState: UIControlStateNormal];
[validCodeBtn_ setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[validCodeBtn_ setEnabled:YES];
}else{
seconds--;
NSString *title = [NSString stringWithFormat:MSG_DYNAMIC_CODE_WAIT,seconds];
[validCodeBtn_ setTitleColor:[UIColor grayColor] forState:UIControlStateNormal];
[validCodeBtn_ setEnabled:NO];
[validCodeBtn_ setTitle:title forState:UIControlStateNormal];
}
}
//如果登陆成功，停止验证码的倒数，
- (void)releaseTImer {
if (timer) {
if ([timer respondsToSelector:@selector(isValid)]) {
if ([timer isValid]) {
[timer invalidate];
seconds = 60;
}
}
}
}

原文地址：http://www.cnblogs.com/zhangliukou/p/4124047.html

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