ios - 已弃用 AudioSessionInitialize 的修复？

Question

Apple 没有在 Apple Developer 网站上为此发布任何替代代码。

Answer 1

您应该使用 AVAudioSession。

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

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

并实现您的 audioSessionDidChangeInterruptionType: 处理程序，如：

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

Answer 2

1.对于这个代码

AudioSessionInitialize( NULL, NULL, interruptionCallback, self );

用。。。来代替

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

2.从此代码

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 3

等效的代码

// 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

Answer 4

在swift中，我们可以添加以下内容

let audioSession = AVAudioSession.sharedInstance()
        do {
            try audioSession.setActive(true)
            try audioSession.setCategory(AVAudioSessionCategoryPlayback)
        } catch {
            print("Setting category to AVAudioSessionCategoryPlayback failed.")
        }

来自：https ://developer.apple.com/documentation/avfoundation/avaudiosession

Answer 5

斯威夫特版本：

do {
    try AVAudioSession.sharedInstance().setActive(true)
} catch let error {
    print("\(error.localizedDescription)")
}

do {
    try AVAudioSession.sharedInstance().setCategory(.playback, mode: .spokenAudio)
} catch let error {
    print("\(error.localizedDescription)")
}