Question

如果用户在播放iDevice音乐播放器的情况下返回游戏，我想停止播放我的游戏音乐。

AppDelegate.m applicationWillEnterForeground正在成功检查音乐播放器，但我不知道如何告诉我的AVAudioPlayer停止，从这里开始。

如果有人能告诉我该怎么做，真的很感激吗？这让我头疼不已！

AppDelegate.m：

- (void)applicationWillEnterForeground:(UIApplication *)application
{
    UInt32 propertySize, audioIsAlreadyPlaying=0;
    propertySize = sizeof(UInt32);
    AudioSessionGetProperty(kAudioSessionProperty_OtherAudioIsPlaying, &propertySize, &audioIsAlreadyPlaying);

    if(audioIsAlreadyPlaying){¨
        NSLog(@"iDevice Music is playing!");
        [myAudioPlayer stop];//<<< *** the problemo bit *** :(
    }
}

Page1ViewController.m代码，如果有帮助：

- (void)viewDidLoad
{
    NSError *myAudioSessionError = nil;
    myAudioSession = [AVAudioSession sharedInstance];
    if ([myAudioSession setCategory:AVAudioSessionCategoryAmbient error:&myAudioSessionError]){
        NSLog(@"AVAudioSession created.");
    }else {
        NSLog(@"AVAudioSession not created.");
    }

    …
    (if/else statements call the createAudioPlayer method.)
}

-(void)createAudioPlayer{
    dispatch_queue_t dispatchQueue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
    dispatch_async(dispatchQueue, ^(void){
        NSBundle *mainBundle = [NSBundle mainBundle];
        NSString *musicFilePath = [mainBundle pathForResource:@"main_music" ofType:@"aiff"];
        NSData *musicFileData = [NSData dataWithContentsOfFile:musicFilePath];
        NSError *myAudioPlayerError = nil;
        //Start the audio player
        self.myAudioPlayer = [[AVAudioPlayer alloc] initWithData:musicFileData error:&myAudioPlayerError];
        if (self.myAudioPlayer != nil){//Check AVAudioPlayer successfully initiated
            self.myAudioPlayer = self;
            self.myAudioPlayer = -1;//loop continuously
            if ([self.myAudioPlayer prepareToPlay]){
                //(successfully created AudioPlayer)
            }else {
                //(failed to play)
            }
        }else {
            //(failed to initiate an AudioPlayer)
        }
    });
}

Answer 1

首先，myAudioPlayer是Page1ViewController的一个属性，但在你的AppDelegate中，你引用它就像在委托中声明它一样。

你应该获得对Page1ViewControllers音频播放器的引用停止。

除非我误解了你的代码，否则你应该做这样的事情。

- (void)applicationWillEnterForeground:(UIApplication *)application {

......

[self.page1ViewController.myAudioPlayer stop];

......



}

Answer 2

或者，如果您不想创建Page1ViewController的属性，可以在Page1ViewController中创建一个方法，该方法返回myAudioPlayer以在另一个类（如AppDelegate）中使用。以下示例..

//Page1ViewController.h
@interface Page1ViewController : UIViewController...
....
-(AVAduioPlayer*)currentPlayer;
@end

//Page1ViewController.m
-(AVAudioPlayer*)currentPlayer {
  return self.myAudioPlayer;
}


//AppDelegate.m

- (void)applicationWillEnterForeground:(UIApplication *)application {

  [[page1ViewController currentPlayer] stop];
}

从AppDelegate applicationWillEnterForeground控制AVAudioPlayer

2 个答案: