内存管理 - 加载音效 - Cocoa Xcode答案

【问题标题】：Memory Management - Loading Sound Effects - Cocoa Xcode内存管理 - 加载音效 - Cocoa Xcode
【发布时间】：2014-10-10 07:14:10
【问题描述】：

因此，我注意到我应该优化在我正在为 iOS 开发的小游戏中加载和使用声音的方式。

我每次点击屏幕时都会加载“boing”声音并播放它，使精灵跳跃（如马里奥）。我希望每次都能播放声音，即使声音已经从上一次跳转开始播放...

以下是我目前使用的两种方式：

第一次实施：

   //load the music from file
   -(void)LoadMusic{
          jumpSound = [[NSBundle mainBundle] pathForResource:@"boing" ofType:@"mp3"];
   }

   //call in viewDidLoad
   - (void)viewDidLoad{
          [self LoadMusic];
          ...
          [super viewDidLoad];
   }

   //play sound when called
   -(void)playSound{
          jumpAffect = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:jumpSound] error:NULL];
          [jumpAffect play];
   }

   //tap/touch to jump (& play sound)
   -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *) event{
          [self playSound];
          jumpUp = 16;
   }

第二个实现：，这是类似的，除了我加载相同的文件 5 次，然后循环到下一个（所以即使它已经在上一个会话中也可以调用相同的声音效果） .

   int soundStage = 1;

   //load the music from file
   -(void)LoadMusic{
           jumpSound = [[NSBundle mainBundle] pathForResource:@"Boing" ofType:@"mp3"];

           jumpAffect = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:jumpSound] error:NULL];
           jumpAffect.delegate = self;

           jumpAffect2 = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:jumpSound] error:NULL];
           jumpAffect2.delegate = self;

           jumpAffect3 = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:jumpSound] error:NULL];
           jumpAffect3.delegate = self;

           jumpAffect4 = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:jumpSound] error:NULL];
           jumpAffect4.delegate = self;

           jumpAffect5 = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:jumpSound] error:NULL];
           jumpAffect5.delegate = self;
   }

   //call in viewDidLoad
   - (void)viewDidLoad{
          [self LoadMusic];
          ...
          [super viewDidLoad];
   }

  //tap/touch to jump (& play sound)
   -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *) event{

          jumpUp = 16;

         if(soundStage == 1){
             [jumpAffect play];
             soundStage = 2;
         }
         else if(soundStage == 2){
             [jumpAffect2 play];
             soundStage = 3;
         }
         else if(soundStage == 3){
             [jumpAffect3 play];
             soundStage = 4;
         }
         else if(soundStage == 4){
             [jumpAffect4 play];
             soundStage = 5;
         }
         else if(soundStage == 5){
             [jumpAffect5 play];
             soundStage = 1;
    }

我想知道为什么哪个更好？我希望避免内存泄漏，并通过在点击屏幕时能够连续播放相同的声音来优化它。谢谢。

【问题讨论】：

标签： ios cocoa audio

【解决方案1】：

AVAudioPlayer 同时播放多个声音，每个音频播放器一个声音。所以更好的是在 touchesBegan 方法中加载/播放你的快速声音而不保留参考：

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *) event
{
    NSString *jumpSound = [[NSBundle mainBundle] pathForResource:@"boing" ofType:@"mp3"];
    AVAudioPlayer *jumpAffect = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:jumpSound] error:NULL];
    [jumpAffect prepareToPlay];
    [jumpAffect play];
    jumpUp = 16;
}

【讨论】：