ios中使用AVPlayer的音頻流

Question

我正在嘗試開發一個應該從特定鏈接流式傳輸音頻的小應用程序。 我為此使用 AVPlayer，但我不知道為什么它不起作用。 試過谷歌，但那里似乎沒有什么相關的。 請幫助..謝謝

- (void)viewDidLoad
{
[super viewDidLoad];

NSURL *url = [NSURL URLWithString:@"http://108.166.161.206:8826/stream.mp3"];

self->playerItem = [AVPlayerItem playerItemWithURL:url];
self->player = [AVPlayer playerWithPlayerItem:playerItem];
self->player = [AVPlayer playerWithURL:url];
[player play];

}

Answer 1

不知道為什么你首先用一個 playeritem 初始化你的播放器，然后用一個 NSURL 初始化它。 無論如何，這是要走的路：

-(void) viewDidLoad{

    player = [[AVPlayer alloc] initWithURL:
             [NSURL URLWithString:@"http://xxx/yourfile.mp3"]];

    [player addObserver:self forKeyPath@"status" options:0 context:nil];
}

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

    if (object == player && [keyPath isEqualToString:@"status"]) {
        if (player.status == AVPlayerStatusReadyToPlay) {
            [player play];
        }
        if (player.status == AVPlayerStatusFailed) {
            NSLog(@"Something went wrong: %@", player.error);
        }
    }
}

AV Foundation Programming Guide應該是了解 AVPlayer 的工作原理的良好起點

Answer 2

這行不是必需的self->player = [AVPlayer playerWithURL:url];

- (void)viewDidLoad
{
[super viewDidLoad];

NSURL *url = [NSURL URLWithString:@"http://108.166.161.206:8826/stream.mp3"];

self->playerItem = [AVPlayerItem playerItemWithURL:url];
self->player = [AVPlayer playerWithPlayerItem:playerItem];
[player play];

}

也不要忘記將 NSAllowsArbitraryLoads 鍵添加到 info.plist

Answer 3

你可以用 AVAudioPlayer 試試這個：

NSData *fileData = [NSData dataWithContentsOfURL:
                   [NSURL URLWithString:@"http://108.166.161.206:8826/stream.mp3"]];
NSError *error = nil;
self.player = [[AVAudioPlayer alloc] initWithData:fileData error:&error];
[self.player play];