Xcode 5 ntimer倒计时移除2条生命而不是1条

你好，我正在尝试制作一款高级测验游戏，每回答一个问题倒数5秒，并在5秒内回答10分，3秒内回答5分，1秒内1个但我的主要问题是计数器起作用了我调用的一个方法来删除一个直播并开始错误答案的方法都起作用了但突然间，它删除了2个生命而不是1个并且超出了我设定的0的上限游戏结束时是-2个生命我不知道有人能帮我吗?会很感激这么多和一点菜鸟在编码。这是我使用的代码在我的游戏里。M文件

///////计时器//////////////

-(void) timerRun {
    secondsCount = secondsCount - 1;
    //int minuts = secondsCount /60;
    int seconds = secondsCount;// - (minuts * 60);
    NSString *timerOutput = [NSString stringWithFormat:@"%.2d" ,  seconds];
    countDownLaber.text = timerOutput;
    if (secondsCount == 0) {
        [countDownTimer invalidate];
        countDownTimer = nil;
        [self LoseByTime];
    }    
}

-(void) setTimer{
    secondsCount = 5;
    countDownTimer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(timerRun) userInfo:nil repeats:YES];
}

///////////////计时器 ///////////////////

-(void)LoseByTime{
    LivesNumber = LivesNumber - 1;
    Lives.text = [NSString stringWithFormat:@"%i" , LivesNumber];
}


-(void)RightAnswer{
    ScoreNumber = ScoreNumber + 50;
    Score.text = [NSString stringWithFormat:@"%i" , ScoreNumber];
    NextCategory.hidden = NO;
    Answer1.hidden = YES;
    Answer2.hidden = YES;
    Answer3.hidden = YES;
    Answer4.hidden = YES;
    QuestionText.hidden = NO;
    CategorySelected.hidden = YES;
    //Result.hidden = NO;
    //Result.image = [UIImage imageNamed:@"transparentPic.png"];
}

-(void)WrongAnswer{
    LivesNumber = LivesNumber - 1;
    Lives.text = [NSString stringWithFormat:@"%i" , LivesNumber];
    NextCategory.hidden = NO;
    Answer1.hidden = YES;
    Answer2.hidden = YES;
    Answer3.hidden = YES;
    Answer4.hidden = YES;
    QuestionText.hidden = NO;
    CategorySelected.hidden = YES;
    //Result.hidden = NO;
    //Result.image = [UIImage imageNamed:@"transparentPic.png"];

    if (LivesNumber == 0) {
        Result.image = [UIImage imageNamed:@"gameOver.png"];
        NextCategory.hidden = YES;
        Exit.hidden = NO;
        GameInProgress = NO;
    }

}

- (IBAction)Answer1:(id)sender;{
    if (Answer1Correct == YES) {
        [self RightAnswer];
        right1.hidden = NO;
    }
    else{
        [self WrongAnswer];
        wrong1.hidden = NO;

    }
}
- (IBAction)Answer2:(id)sender;{
    if (Answer2Correct == YES) {
        [self RightAnswer];
        right2.hidden = NO;

    }
    else{
        [self WrongAnswer];
        wrong2.hidden = NO;

    }
}
- (IBAction)Answer3:(id)sender;{
    if (Answer3Correct == YES) {
        [self RightAnswer];
        right3.hidden = NO;

    }
    else{
        [self WrongAnswer];
        wrong3.hidden = NO;

    }
}
- (IBAction)Answer4:(id)sender;{
    if (Answer4Correct == YES) {
        [self RightAnswer];
        right4.hidden = NO;

    }
    else{
        [self WrongAnswer];
        wrong4.hidden = NO;

    }
}