ID3藝術品標籤從MP3文檔目錄iPhone開發

Question

我在用戶的文檔目錄中有幾個MP3文件，我希望能夠獲得並顯示ID3藝術品標籤。我曾嘗試使用NSURLAsset，但我不確定如何將其轉換爲UIImage或UIImageView！

謝謝！

Answer 1

您必須使用AVAsset類：
例如：

NSString *mp3Path = [[NSBundle mainBundle] pathForResource:@"audio-file" ofType:@"mp3"]; 
NSURL *url = [NSURL fileURLWithPath:mp3Path]; 

AVAsset *asset = [AVURLAsset URLAssetWithURL:url options:nil]; 
for (NSString *format in [asset availableMetadataFormats]) { 
    for (AVMetadataItem *item in [asset metadataForFormat:format]) { 
     if ([[item commonKey] isEqualToString:@"artwork"]) {    
      NSData *data = [(NSDictionary *)[item value] objectForKey:@"data"]; 
      UIImageView *img = [[[UIImageView alloc] initWithImage:[UIImage imageWithData:data]] autorelease]; 
      [self.view addSubview:img]; 
      continue; 
     } 
     NSLog(@"%@", item); 
    } 
} 
NSLog(@"> Duration = %.2f seconds", CMTimeGetSeconds(asset.duration));