AVPlayer类事件

Question

AVPlayer类中有没有委托方法？我需要处理中断，如电话呼叫等。AVAudioPlayer支持。如果AVPlayer不支持，如何用AVAudioPlayer流式播放音频？

Answer 1

AVPlayer没有您想要的方法，但是您可以改用AVAudioSession对象

1)选择AVAudioSession对象(例如[AVAudioSession sharedInstance])

2)调用setActive:error:方法将其设置为活动

3)设置其代理(实现AVAudioSessionDelegate协议的类)

4)实现委托的方法，如

-(void)beginInterruption;
-(void)endInterruptionWithFlags:(NSUInteger)flags;
-(void)endInterruption;

Answer 2

编辑

我在AVPlayer class中看不到任何可用的委派

那么，如何使用AVAudioPlayer流式传输音频呢？因为我们不知道您需要如何流式传输它，最重要的是，的提供了一些灵感

查看相关问题：

• stopping an AVAudioPlayer
• Reusing an AVAudioPlayer for a different sound
• avaudioplayer playingsong
• Streaming with an AVAudioplayer
• http://blog.guvenergokce.com/avaudioplayer-on-iphone-simulator/57/
• http://www.iphonedevsdk.com/forum/iphone-sdk-development/15991-sample-code-avaudioplayer.html

和教程

• http://mobileorchard.com/easy-audio-playback-with-avaudioplayer/

AVAudioPlayerDelegate协议参考 http://developer.apple.com/library/ios/#documentation/AVFoundation/Reference/AVAudioPlayerDelegateProtocolReference/Reference/Reference.html#//apple_ref/doc/uid/TP40008068

声音播放完成的

• Responding

-音频解码错误的audioPlayerDidFinishPlaying:successfully:

• Responding

-audioPlayerDecodeErrorDidOccur:错误：

• Handling音频中断

- audioPlayerBeginInterruption：

- audioPlayerEndInterruption：

- audioPlayerEndInterruption:withFlags:

Answer 3

我不认为AVPlayer会带你去那里。看看AVAudioPlayerDelegate，audioPlayerBeginInterruption将是您正在寻找的委托方法。

下面是我在AVAudioPlayer中使用的代码示例(我假设你已经知道如何构建你的url)：

// Instantiates the AVAudioPlayer object, initializing it with the sound
NSError * errAV = nil;
AVAudioPlayer *newPlayer = [[AVAudioPlayer alloc] initWithContentsOfUrl: mUrl error: &errAV];
if (newPlayer == nil) {

    NSString * msg = [[NSString alloc] initWithFormat:@"An internal error has occured:  %@", [errAV localizedDescription]];
    UIAlertView *uiav = [[UIAlertView alloc] initWithTitle:@"Play Sound" 
                                                   message:msg delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [uiav show];
    [uiav release];
    [msg release];
} else {

    self.appSoundPlayer = newPlayer;
    [newPlayer release];
    // "Preparing to play" attaches to the audio hardware and ensures that playback
    //      starts quickly when the user taps Play
    [appSoundPlayer prepareToPlay];
    [appSoundPlayer setVolume: 1.0];
    [appSoundPlayer setDelegate: self];
    [appSoundPlayer play];
}