//WYCountdownButton *countdownButton = [WYCountdownButton buttonWithType:UIButtonTypeCustom];
WYCountdownButton *countdownButton = [WYCountdownButton countDown];
countdownButton.frame = CGRectMake(80, 80, 100, 35);
countdownButton.backgroundColor = [UIColor redColor];
/**设置开始时的文字*/
countdownButton.title_normal = @"获取验证码";
[self.view addSubview:countdownButton];
/**设置结束后的文字*/
countdownButton.title_end = @"重新获取";
/**点击按钮之后*/
[countdownButton didTouchUpCountDownButton:^(WYCountdownButton *countDownItem, NSInteger tag) {
    /**开始计时*/
    [countdownButton startCountdown];
}];