Question

我正在开发一个音乐播放器应用并使用AVPlayer，我必须从文档目录播放音频并直接流式传输。但是我的AVPlayer消耗了大量的CPU，使应用程序停留在随机位置。

App Flow

发起AVPlayer
检查播放器是否在内存中不，如果是，则用新音频替换CurrentItemWithPlayerItem 资产。
并且流传递了资产的URL

我能得到任何帮助。

任何请让我知道音乐应用的CPU消耗是正常的。

由于

    NSArray *pathArray = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES);
NSString* documentsDirectory = [pathArray objectAtIndex:0];


NSString* filePath = [documentsDirectory returnDocumentDirectoryPath:@"filename.mp3"];
NSURL *soundURL;
if ([[NSFileManager defaultManager] fileExistsAtPath:filePath])
{
    soundURL = [NSURL fileURLWithPath:filePath isDirectory:NO];
}

if (_player != nil){
    [_player pause];
    [_player removeObserver:self forKeyPath:@"status"];
}


AVAsset *asset = [AVURLAsset URLAssetWithURL:soundURL options:nil];
AVPlayerItem *anItem = [AVPlayerItem playerItemWithAsset:asset];

_player = [AVPlayer playerWithPlayerItem:anItem];
[_player addObserver:self forKeyPath:@"status" options:0 context:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(itemDidFinishPlaying:) name:AVPlayerItemDidPlayToEndTimeNotification object:[_player currentItem]];

使用以下代码更改音轨时

[_player replaceCurrentItemWithPlayerItem:[AVPlayerItem playerItemWithAsset:[AVURLAsset URLAssetWithURL:soundURL options:nil]]];

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(itemDidFinishPlaying:) name:AVPlayerItemDidPlayToEndTimeNotification object:[_player currentItem]];
    [_player play];

在线直播

 if(!_player)
    _player = [[AVPlayer alloc] init];


resourcePath=@"www.google.com/abc.mp3"//stream URL
AVURLAsset *asset = [[AVURLAsset alloc] initWithURL:[NSURL URLWithString:resourcePath] options:nil];
NSArray *keys     = [NSArray arrayWithObject:@"playable"];

[asset loadValuesAsynchronouslyForKeys:keys completionHandler:^() {

    if(!playerPlaying){
        [_player replaceCurrentItemWithPlayerItem:[AVPlayerItem playerItemWithAsset:asset]];
    }
}];

AVPlayer消耗了大量的CPU。让app随机卡住

0 个答案: