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,这是之前推荐的修补程序。由于我已升级到iOS6,因此无法正常工作 - 事实证明,iOS5也无法正常工作!
更新:我根据这篇文章找到了一个似乎有效的答案: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。
答案 0 :(得分:1)
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”,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。