ios - 使用 AVPlayer 播放和下载 MP3 文件

Question

我目前正在使用以下代码通过 AVPlayer 播放 mp3

    NSString *title = [[NSString alloc] initWithFormat:@"http://.......com/%@", mp3File];
    NSURL *url = [[NSURL alloc] initWithString:title];
    AVPlayerItem *anItem = [AVPlayerItem playerItemWithURL:url];


    player = [AVPlayer playerWithPlayerItem:anItem];

    [player play];

不过我也想把下载的文件保存起来，这样后面的播放就不需要再下载了。为此，我使用以下内容

     NSString  *path = [NSHomeDirectory() stringByAppendingPathComponent:[@"Documents/" stringByAppendingString:surahAyah]];

     if (![[NSFileManager defaultManager] fileExistsAtPath:path])
     {
        NSString *title = [[NSString alloc] initWithFormat:@"http://.......com/%@", mp3File];
        NSURL *url = [[NSURL alloc] initWithString:title];

        NSData *dbFile = [[NSData alloc] initWithContentsOfURL:url];
        [dbFile writeToFile:path atomically:YES];
     }

合并上述内容并使用缓存的最佳实践是什么？ AVPlayerItem 并存储它而不是重新调用以下载和保存文件？

MP3 文件的大小约为 100KB，所以我不太担心下载进度。

Answer 1

我已经使用很棒的 AFNetworking 库成功地完成了这项工作

  NSURLRequest *request = [NSURLRequest requestWithURL:url];
  AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];

  operation.outputStream = [NSOutputStream outputStreamToFileAtPath:path append:NO];

  [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
        NSLog(@"Successfully downloaded file to %@", path);
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"Error: %@", error);
    }];


    [operation start];