1. 一行创建
  _randomCodeView = [[LFLRandomCodeView alloc] initWithFrame:CGRectMake(begainX, 100, 100, 40)];

2. 用户点击确认是否输入正确 block 回调结果,处理即可 
- (void)makeSureHandele{
    __weak typeof(self) ws=self;
    [_randomCodeView isInputCorrectWithString:_textField.text :^(NSString *statusSTring) {
        UIAlertView * alertView= [[UIAlertView alloc]initWithTitle:nil message:statusSTring delegate:ws cancelButtonTitle:@"取消" otherButtonTitles:@"确定", nil];
        [alertView show];
    }];
}