Question

我希望这不是一个愚蠢的问题，因为我已经用谷歌搜索并阅读了很多其他类似的问题，但我已经纠结了这个问题好几天了。

我已经使用NSTimer和UIProgressView实现了倒数计时器，但我希望这次能做更多，即在计时器到达最后10秒时播放警报声。

这就是我所做的：

-(void) updateTimer
{
    if (time <= 0.0f)
    {

     //Invalidate timer when time reaches 0
         [timer invalidate];
         [[AudioManager sharedManager] muteGameClock1Sound];    
         [self showGameOverViewController];
     }
     else
     {
         time -= 0.1;
         [timeProgressView setProgress:time/totalTime animated:YES];

         if (time < 10 && pauseView)
         {
            [[AudioManager sharedManager] playGameClock1Sound];
         }
     }

}

和viewDidLoad：

timeProgressView.progress = 1;
time = [ConfigFileManager sharedManager].timePerQuestion.intValue * [DatabaseManager sharedManager].numberOfQuestions;
totalTime = [ConfigFileManager sharedManager].timePerQuestion.intValue * [DatabaseManager sharedManager].numberOfQuestions;
timer = [NSTimer scheduledTimerWithTimeInterval: 0.1f target: self             selector: @selector(updateTimer) userInfo: nil repeats: YES];

和pauseGame方法：

-(IBAction)pauseGame:(id)sender
{
    self.view.backgroundColor = [UIColor colorWithWhite: 0.0 alpha: 0.4];   
    pauseView = [[UIView alloc] initWithFrame: CGRectMake(0, 0, 250, 150)];
    pauseView.backgroundColor = [UIColor colorWithWhite: 0.0 alpha: 0.4];
    pauseView.center = CGPointMake(self.view.bounds.size.width/2, self.view.bounds.size.height/2);
    pauseView.clipsToBounds = YES;
    if ([pauseView.layer respondsToSelector: @selector(setCornerRadius:)])
        [(id) pauseView.layer setCornerRadius: 10];

    resumeButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 40, 40)];
    resumeButton.center = CGPointMake(pauseView.bounds.size.width/4, pauseView.bounds.size.height/2);
    [resumeButton setBackgroundImage:[UIImage imageNamed:[ConfigFileManager sharedManager].buttonBackground] forState:UIControlStateNormal];
    [resumeButton setBackgroundImage:[UIImage imageNamed:[ConfigFileManager sharedManager].buttonBackgroundSelected] forState:UIControlStateSelected];
    [resumeButton setImage:[UIImage imageNamed:[ConfigFileManager sharedManager].messageResumeButton] forState:UIControlStateNormal];
    [resumeButton addTarget:self action:@selector(resumeTheGame) forControlEvents:UIControlEventTouchUpInside];

    restartButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 40, 40)];
    restartButton.center = CGPointMake(pauseView.bounds.size.width/2, pauseView.bounds.size.height/2);
    [restartButton setBackgroundImage:[UIImage imageNamed:[ConfigFileManager sharedManager].buttonBackground] forState:UIControlStateNormal];
    [restartButton setBackgroundImage:[UIImage imageNamed:[ConfigFileManager sharedManager].buttonBackgroundSelected] forState:UIControlStateSelected];
    [restartButton setImage:[UIImage imageNamed:[ConfigFileManager sharedManager].messageReplayButton] forState:UIControlStateNormal];

    [restartButton addTarget:self action:@selector(restartTheGame) forControlEvents:UIControlEventTouchUpInside];

    quitButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 40, 40)];
    quitButton.center = CGPointMake(pauseView.bounds.size.width*3/4, pauseView.bounds.size.height/2);
    [quitButton setBackgroundImage:[UIImage imageNamed:[ConfigFileManager sharedManager].buttonBackground] forState:UIControlStateNormal];
    [quitButton setBackgroundImage:[UIImage imageNamed:[ConfigFileManager sharedManager].buttonBackgroundSelected] forState:UIControlStateSelected];
    [quitButton setImage:[UIImage imageNamed:[ConfigFileManager sharedManager].messageQuitButton] forState:UIControlStateNormal];

    [quitButton addTarget:self action:@selector(showGameOverViewController) forControlEvents:UIControlEventTouchUpInside];

    [pauseView addSubview:resumeButton];
    [pauseView addSubview:restartButton];
    [pauseView addSubview:quitButton];
    [self.view addSubview: pauseView];
    choice1Button.userInteractionEnabled = NO;
    choice2Button.userInteractionEnabled = NO;
    choice3Button.userInteractionEnabled = NO;
    choice4Button.userInteractionEnabled = NO;
    choice5Button.userInteractionEnabled = NO;
    pauseButton.userInteractionEnabled = NO;

}

问题是playGameClock1Sound方法没有以这种方式被调用，但当我说：if (!pauseView && time > 10)不合理时，然后在这种情况下，当pauseButton是按下，因此pauseView为TRUE，再次调用playGameClock1Sound方法。

如果有人帮我解决这个愚蠢的问题，我将非常感激，如果你告诉我如何处理暂停/恢复，我将非常感激。

Answer 1

你能说明pauseView是如何设置的吗？如果您尝试这样的事情，可能会更简单...

你正在做的一切似乎都很好所以我认为问题在于你如何设置pauseView bool。

此外，您播放的音频文件是否短于或等于定时器延迟时间？如果不是，它将在完成之前再次播放。

-(void) updateTimer
{
    //stop counting if the view is paused
    if(pauseView)
    {
        return;
    }

    //done
    if (time <= 0.0f)
    {
        //Invalidate timer when time reaches 0
        [timer invalidate];
        [[AudioManager sharedManager] muteGameClock1Sound]; 
        [self showGameOverViewController];
    }
    else
    {
        time -= 0.1;
        [timeProgressView setProgress:time/totalTime animated:YES]; 
        if (time < 10)
        {
            NSLog("Play some audio");
            [[AudioManager sharedManager] playGameClock1Sound];
        }
    }
}

Answer 2

确定。实际上，这是我在按下继续按钮时恢复计时器所缺少的：

pauseView = nil;

将其添加到resumeTheGame方法，问题已解决。

使用UIProgressView在倒数计时器期间的事件处理

2 个答案: