我一直在为几个iOS应用程序使用AVAudioPlayer,它们都在屏幕锁定之后成功播放,直到我的iPad2上的iOS6(或iOS5),现在它们停止了.以下是我如何设置它,以前工作正常:
// 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];
请注意,我将类别设置为AVAudioSessionCategoryPlayback,这是之前建议的修复程序.这是因为我升级到iOS6后无法正常工作 – 事实证明,iOS5也无法正常工作!
更新:我找到了一个基于这篇文章的答案:AVAudioPlayer stops playing on screen lock even though the category is AVAudioSessionCategoryPlayback
基本上我进入了目标的Info页面并添加了一个新的键“Required background modes”,为此我添加了一个字符串类型值“App播放音频”.现在,在完全关闭屏幕之前,它会完全通过轨道.
解决方法
我根据这篇文章找到了一个似乎有效的答案:
基本上我进入了目标的Info页面并添加了一个新的键“Required background modes”,它会完全通过轨道.