Question

感谢您花时间看这个问题，我对编程非常陌生并且遇到以下错误的问题。任何帮助都会非常感激。

我目前正在学习Ray Wenderlichs＆＃39; Learning Cocos2D＆＃39;预订，但也尝试使用代码来尝试了解更多，这是我遇到无法修复的问题。

我正在使用CocosDenshion播放主菜单和第一个游戏场景的音乐曲目，Ray在他的书中建议从GAMEPLAY SCENE中调用以下方法......

[[GameManager sharedGameManager] playBackgroundTrack:BACKGOUND_TRACK_OLE_AWAKES];

这当然有效但不是在游戏场景中调用上述方法，而是想控制GameManager类中音乐的开始和停止。所以我想要在菜单中播放音乐，然后在游戏玩法层上播放任何内容并从一个类中控制它。

为此，我尝试在＆＃34; GameManager.h中添加以下内容。＆＃34;。

    if (soundEngine.isBackgroundMusicPlaying == YES) {
        [soundEngine stopBackgroundMusic];
    }

进入下面的方法......

    - (NSString*)formatSceneTypeToString:(SceneTypes)sceneID {
        NSString *result = nil;
        switch(sceneID) {
            case kNoSceneUninitialized:
                if ((soundEngine.isBackgroundMusicPlaying == YES)){
                    [soundEngine stopBackgroundMusic];
                }
                result = @"kNoSceneUninitialized";
                break;

             case kMainMenuScene:

                if ((isSoundEffectsOn == YES)&&(soundEngine.isBackgroundMusicPlaying == NO)){

                [self playBackgroundTrack:BACKGROUND_TRACK_MAIN_MENU];
                } else if ((isSoundEffectsOn == NO)&&(soundEngine.isBackgroundMusicPlaying == YES)){
                    [soundEngine stopBackgroundMusic];
                }

                if (isMusicOn == YES) {
                    result = @"kMainMenuScene";
                } else if (isMusicOn == NO) {
                    result = @"kNoSceneUninitialized";                
                   // return NO;
                }
                break;

           case kOptionsScene:

            if ((isSoundEffectsOn == YES)&&(soundEngine.isBackgroundMusicPlaying == NO)){

                [self playBackgroundTrack:BACKGROUND_TRACK_MAIN_MENU];
            } else if ((isSoundEffectsOn == NO)&&(soundEngine.isBackgroundMusicPlaying == YES)){
                [soundEngine stopBackgroundMusic];
            }
            if (isMusicOn == YES) {
                result = @"kOptionsScene";
            } else if (isMusicOn == NO) {
               // return NO;
                result = @"kNoSceneUninitialized";                
            }
            break;




                case kGameLevel1:


                if ([soundEngine.isBackgroundMusicPlaying == YES]){
                    [soundEngine stopBackgroundMusic]; <--CRASHES HERE!

                } else  {

                }
                result = @"kGameLevel1";
                break;

现在，当我运行MAIN MENU和OPTIONS屏幕时，上面的工作正常，但是当我尝试加载GAMELEVEL1屏幕时似乎崩溃了。崩溃似乎只是偶尔发生一次，这至少令人困惑。

当它崩溃时，它会转到CDAudioManager.h中的以下内容。

-(BOOL) isPlaying {
    if (state != kLAS_Init) {
        return [audioSourcePlayer isPlaying]; <--Thread 18:EXC_BAD_ACCESS(code=1,address=0x8001400c)


    } else {
        return NO;
    }
}

我也在控制台中得到以下内容......

2014-10-28 12:46:03.948 SpaceViking[1807:343] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[CCStandardTouchHandler isPlaying]: unrecognized selector sent to instance 0x7e013d80'
*** First throw call stack:
(
    0   CoreFoundation                      0x05bb25e4 __exceptionPreprocess + 180
    1   libobjc.A.dylib                     0x025658b6 objc_exception_throw + 44
    2   CoreFoundation                      0x05c4f903 -[NSObject(NSObject) doesNotRecognizeSelector:] + 275
    3   CoreFoundation                      0x05ba290b ___forwarding___ + 1019
    4   CoreFoundation                      0x05ba24ee _CF_forwarding_prep_0 + 14
    5   SpaceViking                         0x00183e72 -[CDLongAudioSource isPlaying] + 82
    6   SpaceViking                         0x00185425 -[CDAudioManager isBackgroundMusicPlaying] + 69
    7   SpaceViking                         0x0018ea60 -[SimpleAudioEngine isBackgroundMusicPlaying] + 48
    8   SpaceViking                         0x0019fe62 -[GameManager formatSceneTypeToString:] + 9634
    9   SpaceViking                         0x001a095e -[GameManager getSoundEffectsListForSceneWithID:] + 2302
    10  SpaceViking                         0x0019d50a -[GameManager unloadAudioForSceneWithID:] + 186
    11  Foundation                          0x01e39597 -[NSThread main] + 76
    12  Foundation                          0x01e394f6 __NSThread__main__ + 1275
    13  libsystem_pthread.dylib             0x02d185fb _pthread_body + 144
    14  libsystem_pthread.dylib             0x02d18485 _pthread_struct_init + 0
    15  libsystem_pthread.dylib             0x02d1dcf2 thread_start + 34
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)

很抱歉这个问题很长，但我想尝试尽可能多地提供信息。

修改

我可能完全错了但是如果从2个不同的类调用声音引擎会导致这个吗？正如我在MainMenu层中有以下内容......

-(void)playScene:(CCMenuItemFont*)itemPassedIn {
    if ([itemPassedIn tag] == 1) {
        CCLOG(@"Tag 1 found, mode");
        if ([GameManager sharedGameManager].isSoundEffectsOn ==YES ) {

            PLAYSOUNDEFFECT(BUTTONPRESS); <----Calling the sound engine to play a sound on button press.- this is unloading the sound as level1 starts.

            [[GameManager sharedGameManager] runSceneWithID:kGameLevel1];
        }else if ([GameManager sharedGameManager].isSoundEffectsOn ==NO ) {
            [[GameManager sharedGameManager] runSceneWithID:kGameLevel1];
            return;
        }

Cocos2d CocosDenshion声音引擎停止错误

0 个答案: