AudioSessionInitialize的修复程序已弃用？

Question

Apple没有在Apple Developer网站上发布任何替代代码.

Answer 1

1.对于此代码

AudioSessionInitialize( NULL, NULL, interruptionCallback, self );

用...来代替

[[AVAudioSession sharedInstance] setActive:YES error:nil];

来自这段代码

UInt32 sessionCategory = kAudioSessionCategory_PlayAndRecord;
AudioSessionSetProperty(
        kAudioSessionProperty_AudioCategory,
        sizeof(sessionCategory),
        &sessionCategory
        );

用...来代替

UInt32 sessionCategory = kAudioSessionCategory_PlayAndRecord;
[[AVAudioSession sharedInstance]
     setCategory:sessionCategory error:nil];

Answer 2

你应该使用AVAudioSession.

要替换已弃用的AudioSessionInitialize提供的功能(例如,如果需要指定AudioSessionInterruptionListener回调),可以订阅AVAudioSessionInterruptionNotification通知:

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(audioSessionDidChangeInterruptionType:)
        name:AVAudioSessionInterruptionNotification object:[AVAudioSession sharedInstance]];

并实现你的audioSessionDidChangeInterruptionType:handler,如:

- (void)audioSessionDidChangeInterruptionType:(NSNotification *)notification
{
    AVAudioSessionInterruptionType interruptionType = [[[notification userInfo]
        objectForKey:AVAudioSessionInterruptionTypeKey] unsignedIntegerValue];
    if (AVAudioSessionInterruptionTypeBegan == interruptionType)
    {
    }
    else if (AVAudioSessionInterruptionTypeEnded == interruptionType)
    {
    }
}

Answer 3

等效代码

// C way
UInt32 category = kAudioSessionCategory_MediaPlayback ;
OSStatus result = AudioSessionSetProperty(
  kAudioSessionProperty_AudioCategory, sizeof(category), &category ) ;

if( result ) // handle the error

是

// Objective-C way
NSError *nsError;
[[AVAudioSession sharedInstance]
  setCategory:AVAudioSessionCategoryPlayback error:&nsError];

if( nsError != nil )  // handle the error