我一直在为几个iOS应用程序使用AVAudioPlayer,它们都在屏幕锁定之前成功回放,直到我的iPad2上的iOS6(或iOS5),现在它们停止。这是我如何设置它,它用来做工精细:iOS5,iOS6为什么AVAudioPlayer播放在屏幕锁定时停止?
// Registers this class as the delegate of the audio session.
[[AVAudioSession sharedInstance] setDelegate: self];
// Use this code instead to allow the app sound to continue to play when the screen is locked.
[[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryPlayback error: nil];
UInt32 doSetProperty = 0;
AudioSessionSetProperty (kAudioSessionProperty_OverrideCategoryMixWithOthers,
sizeof (doSetProperty),
&doSetProperty
);
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
// Registers the audio route change listener callback function
AudioSessionAddPropertyListener (
kAudioSessionProperty_AudioRouteChange,
audioRouteChangeListenerCallback,
(__bridge void *)self
);
// Activates the audio session.
NSError *activationError = nil;
[[AVAudioSession sharedInstance] setActive: YES error: &activationError];
// Instantiates the AVAudioPlayer object, initializing it with the sound
AVAudioPlayer *newPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL: medURL error: nil];
self.appSoundPlayer = newPlayer;
// "Preparing to play" attaches to the audio hardware and ensures that playback
// starts quickly when the user taps Play
[appSoundPlayer prepareToPlay];
[appSoundPlayer setVolume: 0.5];
[appSoundPlayer setDelegate: self];
注意,我设置的类别AVAudioSessionCategoryPlayback这是以前推荐的修补程序。这不起作用,因为我已升级到iOS6 - 也不适用于iOS5,因为它变成了!
更新:我发现,似乎是基于对这个职位的工作答案:AVAudioPlayer stops playing on screen lock even though the category is AVAudioSessionCategoryPlayback
基本上我走进了目标的信息页,并增加了新的密钥“所需的背景模式”,这个我加字符串类型值“应用程序播放音频”。现在,它可以在完全关闭屏幕之前完成整个轨道。