static int timeNumber = 60;@property (nonatomic, strong) UIButton *verificationButton;@property(nonatomic,strong)NSTimer*timeRepeat;#pragma mark ------获取验证码---------- (void)getVerification{        _verificationButton = [[UIButton alloc] initWithFrame:CGRectMake(CGRectGetMaxX(_VerificationTextField.frame)-110, 195, 90, 35)];    [_verificationButton setBackgroundImage:[UIImage imageFileNamed:@"yanzhengma"] forState:UIControlStateNormal];    [_verificationButton setTitle:@"获取验证码" forState:UIControlStateNormal];    _verificationButton.titleLabel.font =[UIFont systemFontOfSize:14];    [_verificationButton setTitleColor:[UIColor grayColor] forState:UIControlStateNormal];    [_verificationButton addTarget:self action:@selector(getVerificationButtonClick) forControlEvents:UIControlEventTouchUpInside];    [_verificationButton setTitle:@"60秒重发" forState:(UIControlStateDisabled)];    [_backScrollView addSubview:_verificationButton];}//获取验证码按钮点击- (void)getVerificationButtonClick{            NSString *string = [NSString stringWithFormat:@"%@&c=common&a=sendVerifyCode&mobile=%@",url_public,_teleTextField.text];        [self GET:string parameters:nil success:^(id responseObject) {                if ([[responseObject objectForKey:@"code"] isEqualToString:@"1"]) {                        UIAlertView *av = [[UIAlertView alloc] initWithTitle:nil message:responseObject[@"message"] delegate:nil cancelButtonTitle:@"我知道了" otherButtonTitles:nil, nil];            [av show];        }else if ([[responseObject objectForKey:@"code"] isEqualToString:@"03"]){                        UIAlertView *av = [[UIAlertView alloc] initWithTitle:nil message:responseObject[@"message"] delegate:nil cancelButtonTitle:@"我知道了" otherButtonTitles:nil, nil];            [av show];        }                    } failure:^(NSError *error) {                    }];    //非常重要的一句代码，没有的话验证码不会倒计时    _verificationButton.enabled = NO;    timeNumber = 60;        NSString *str_second = [NSString stringWithFormat:@"%d秒重发",timeNumber];        [_verificationButton setTitle:str_second forState:(UIControlStateDisabled)];        _timeRepeat = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(timeChage) userInfo:nil repeats:YES];}-(void)timeChage{        static int nnn = 0;        if (timeNumber == 60) {        NSString*string = [NSString stringWithFormat:@"%d秒重发",59];        timeNumber = 59;        [_verificationButton setTitle:string forState:(UIControlStateDisabled)];    }else {        NSString*string = [NSString stringWithFormat:@"%d秒重发",timeNumber];        [_verificationButton setTitle:string forState:(UIControlStateDisabled)];    }        if (nnn == 0) {        int number = timeNumber--;        if (number+1 == 0) {            [_timeRepeat invalidate];            _verificationButton.enabled = YES;        }    }    }