短信验证码倒计时按键的实现

短信验证码倒计时

一般是个按键,设定一个定时器,每秒更新button的title,代码如下

@interface BPBaseViewController ()
@property (nonatomic, strong) NSTimer *codeTime;
@end

- (void)resetSmsVerifyCodeTimer:(UIButton *)button{
    [button setTitle:@"60" forState:UIControlStateNormal];
    [button setUserInteractionEnabled:NO];
    _codeTime = [NSTimer scheduledTimerWithTimeInterval:1.0f target:self selector:@selector(updateTimerText:) userInfo:button repeats:YES];
}

- (void)updateTimerText:(NSTimer *)timer {
    UIButton *button = [timer userInfo];
    NSString *countdown = button.titleLabel.text;
    if([countdown isEqualToString:@"0"] || [countdown intValue] < 1) {
        [self cancelSMSTimer:timer];
    }
    else {
        int icountdown = [countdown intValue];
        icountdown--;
        NSString *ncountdown= [[NSString alloc] initWithFormat:@"%d",icountdown];
        [button setTitle:ncountdown forState:UIControlStateNormal];
    }
}

- (void)cancelSMSTimer:(NSTimer *)timer{
    UIButton *button = [timer userInfo];
    if ([_codeTime isValid]) {
        [_codeTime invalidate];
        _codeTime = nil;
    }
    [button setTitle:@"获取验证码" forState:UIControlStateNormal];
    button.userInteractionEnabled = YES;
}

赏

请问老板还招人么(/ω＼)

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