Question

我知道很多人之前已经问过这个问题，但我不知道为什么这个问题在我的x-code和objective c的应用程序中没有用呢！

基本上，我想通过网址在应用程序中播放音频。只需使用Apple网站上的测试音频，我的代码就是：

NSString *playString = @"http://devimages.apple.com/iphone/samples/bipbop/bipbopall.m3u8";

//Converts songURL into a playable NSURL
NSURL *playURL = [NSURL URLWithString:playString];

AVAudioPlayer *backgroundMusicPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:playURL error:&error];

if (backgroundMusicPlayer == nil) {
    NSLog(@"%@", [error description]);
}
else {
    [backgroundMusicPlayer prepareToPlay];
    [backgroundMusicPlayer play];
}

它出现以下错误：

错误域= NSOSStatusErrorDomain代码= -43“无法完成操作。（OSStatus错误-43。）

当我谷歌时，我找不到任何东西。有任何想法吗？我应该尝试其他音频流吗？或者有没有人有一个有效的例子？是因为我使用的是iPhone模拟器而不是真正的iPhone吗？

编辑：

请注意 - 当我说网址时，我指的是来自实际网站，例如“http://devimages.apple.com/iphone/samples/bipbop/bipbopall.m3u8” 我不想先下载这首歌，我希望能够在下载时播放它！感谢

Answer 1

使用AVPlayer从url播放mp3文件

-(void)playselectedsong{

    AVPlayer *player = [[AVPlayer alloc]initWithURL:[NSURL URLWithString:urlString]];
    self.songPlayer = player;
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(playerItemDidReachEnd:)
                                                 name:AVPlayerItemDidPlayToEndTimeNotification
                                               object:[songPlayer currentItem]];
    [self.songPlayer addObserver:self forKeyPath:@"status" options:0 context:nil];
    [NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(updateProgress:) userInfo:nil repeats:YES];

    [self.songPlayer play];

}
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {

    if (object == songPlayer && [keyPath isEqualToString:@"status"]) {
        if (songPlayer.status == AVPlayerStatusFailed) {
            NSLog(@"AVPlayer Failed");

        } else if (songPlayer.status == AVPlayerStatusReadyToPlay) {
            NSLog(@"AVPlayerStatusReadyToPlay");


        } else if (songPlayer.status == AVPlayerItemStatusUnknown) {
            NSLog(@"AVPlayer Unknown");

        }
    }
}

- (void)playerItemDidReachEnd:(NSNotification *)notification {

 //  code here to play next sound file

}

Answer 2

非常简单使用AVAudioPlayer，将对象作为AVAudioPlayer * audioPlayer，

  NSURL *url = [NSURL URLWithString:@"http://devimages.apple.com/iphone/samples/bipbop/bipbopall.m3u8"];
  NSData *soundData = [NSData dataWithContentsOfURL:url];
  audioPlayer = [[AVAudioPlayer alloc] initWithData:soundData  error:NULL];
  audioPlayer.delegate = self;
  [audioPlayer play];

写下面的委托方法：

 -(void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag
    [audioPlayer stop];
     NSLog(@"Finished Playing");
  }

 - (void)audioPlayerDecodeErrorDidOccur:(AVAudioPlayer *)player error:(NSError *)error
 {
  NSLog(@"Error occured");
 }

Answer 3

You may find a live test stream at here

要播放文件：

[player play];

以下是从URL播放实时流的代码：

NSURL *url = [NSURL URLWithString:@"<#Live stream URL#>];
self.playerItem = [AVPlayerItem playerItemWithURL:url];
    /* [playerItem addObserver:self forKeyPath:@"status" options:0 context:&ItemStatusContext]; (can use it) */
self.player = [AVPlayer playerWithPlayerItem:playerItem];
self.player = [AVPlayer playerWithURL:<#Live stream URL#>];
//(optional) [player addObserver:self forKeyPath:@"status" options:0 context:&PlayerStatusContext];

如何从iPhone上的在线网址播放音频

3 个答案: