在iOS中播放声音会暂停背景音乐

Question

如何在不暂停背景音乐的情况下在iOS中播放声音？

我有这样的：

NSString *soundPath = [[NSBundle mainBundle] pathForResource:@"alert" ofType:@"wav"]; 
NSURL *url = [NSURL URLWithString:soundPath]; 

[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryAmbient error:nil]; 
AVAudioPlayer *audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL: url error:nil]; 
audioPlayer.numberOfLoops = 0; 
[audioPlayer play]; 

而且还没有任何背景音乐停止。我错过了什么？

我也试过了，没有用：

- (void)alarm:(CDVInvokedUrlCommand *)command { 
    [self setupAudioSession]; 
    NSString *soundPath = [[NSBundle mainBundle] pathForResource:@"alert" ofType:@"wav"]; 
    NSURL *url = [NSURL URLWithString:soundPath]; 

    AVPlayer *audioPlayer = [[AVPlayer alloc] initWithURL: url]; 
    [audioPlayer play]; 
} 

- (void)setupAudioSession { 
    AudioSessionInitialize(NULL,NULL,NULL,NULL); 

    OSStatus activationResult = 0; 
    activationResult   = AudioSessionSetActive(true); 

    UInt32 sessionCategory = kAudioSessionCategory_MediaPlayback; 

    AudioSessionSetProperty 
    (
    kAudioSessionProperty_AudioCategory, 
    sizeof(sessionCategory), 
    &sessionCategory 
    ); 

    OSStatus propertySetError = 0; 
    UInt32 allowMixing  = true; 

    propertySetError = AudioSessionSetProperty 
    (
    kAudioSessionProperty_OverrideCategoryMixWithOthers, 
    sizeof(allowMixing), 
    &allowMixing 
    ); 
    [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryAmbient error:nil]; 
} 

Answer 1

您需要设置相应的音频会议，这样的事情：

AudioSessionInitialize(NULL,NULL,NULL,NULL); 

OSStatus activationResult = 0; 
activationResult   = AudioSessionSetActive(true); 

UInt32 sessionCategory = kAudioSessionCategory_MediaPlayback; 

AudioSessionSetProperty 
(
    kAudioSessionProperty_AudioCategory, 
    sizeof(sessionCategory), 
    &sessionCategory 
); 

OSStatus propertySetError = 0; 
UInt32 allowMixing  = true; 

propertySetError = AudioSessionSetProperty 
(
    kAudioSessionProperty_OverrideCategoryMixWithOthers, 
    sizeof(allowMixing), 
    &allowMixing 
);