platform:ios,'7.0'
target 'YourProjectName' do
pod 'countDownButton'
end

@property(nonatomic,strong) LFCountDownButton *countDownButton;


//创建倒计时按钮
 self.countDownButton = [[LFCountDownButton alloc]init];
 self.countDownButton.frame = CGRectMake(10, 130, 150, 40);
[self.countDownButton.titleLabel setFont:[UIFont systemFontOfSize:14.0f]];
[self.countDownButton setTitle:@"Start CountDown" forState:UIControlStateNormal];
[self.countDownButton setBackgroundColor:[UIColor redColor]];
[self.view addSubview:self.countDownButton];

// 1. 倒计时按钮点击
[self.countDownButton touchCountDownButtonHandler:^(LFCountDownButton *countDownButton, NSInteger tag) {
    
    countDownButton.enabled = NO;
    
    //1.1开始倒计时
    [countDownButton startCountDownWithSecond:10];
    
    //do something...
    
    //1.2 倒计时进行中
    [countDownButton countDownButtonChanging:^NSString *(LFCountDownButton *countDownButton, NSUInteger second) {
     
        NSString *title = [NSString stringWithFormat:@"%zd left",second];
        return title;
        
    }];
    
    //1.3 倒计时结束
    [countDownButton countDownButtonFinished:^NSString *(LFCountDownButton *countDownButton, NSUInteger second) {
     
        countDownButton.enabled = YES;
        return @"Obtain again";
        
    }];

}];

- (IBAction)countDownButtonClickForXib:(id)sender {

 //要么拖拽方法的时候改变type(id改为LFCountDownButton类型)，要么自己转下
 self.countDownButtonXib = (LFCountDownButton*)sender;
 self.countDownButtonXib.enabled = NO;

//1.1开始倒计时
[ self.countDownButtonXib startCountDownWithSecond:15];

//do something...

//1.2 倒计时进行中
[ self.countDownButtonXib countDownButtonChanging:^NSString *(LFCountDownButton *countDownButton, NSUInteger second) {
    
    NSString *title = [NSString stringWithFormat:@"%zd left",second];
    return title;
    
}];

//1.3 倒计时结束
[ self.countDownButtonXib countDownButtonFinished:^NSString *(LFCountDownButton *countDownButton, NSUInteger second) {
    
    countDownButton.enabled = YES;
    return @"Obtain again";
}];
}