iphone - 在 iOS 中从图库中附加声音文件

Question

是否可以像在我的 iOS 应用程序中访问图像库一样访问声音文件库，我尝试在网上搜索但没有找到任何关于它的好内容。

Answer 1

您可以参考 Apple 的AddMusic示例应用程序，了解它是如何完成的...

Answer 2

是的，您可以将其上传到服务器。使用以下代码：

当您从选取器中选择一首歌曲时

- (void)mediaPicker: (MPMediaPickerController *)mediaPicker didPickMediaItems:(MPMediaItemCollection *)mediaItemCollection 
{
    MPMediaItem *song = nil ;
    [self dismissModalViewControllerAnimated:YES];

    if ([mediaItemCollection count] < 1) 
    {
        return;
    }
    [song release];
    song = [[[mediaItemCollection items] objectAtIndex:0] retain];

    //song.accessibilityHin

    [self uploadMusicFile:song];
}

- (void) uploadMusicFile:(MPMediaItem *)song
{
    // Init audio with playback capability
    AVAudioSession *audioSession = [AVAudioSession sharedInstance];
    [audioSession setCategory:AVAudioSessionCategoryPlayback error:nil];

    NSURL *assetURL = [song valueForProperty:MPMediaItemPropertyAssetURL];
    AVURLAsset *songAsset = [AVURLAsset URLAssetWithURL:assetURL options:nil];
 // to get uniqe time interval
    [[NSDate date] timeIntervalSince1970];
    // convert this ti string
    NSTimeInterval seconds = [[NSDate date] timeIntervalSince1970];
    NSString *intervalSeconds = [NSString stringWithFormat:@"%0.0f",seconds];

    AVAssetExportSession *exporter = [[AVAssetExportSession alloc] initWithAsset: songAsset                                                                       presetName: AVAssetExportPresetPassthrough];

    exporter.outputFileType = @"public.mpeg-4";

    NSString *exportFile = [[NSString alloc] initWithString:[DOCUMENTS_FOLDER stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.mp4",intervalSeconds]]];


    NSURL *exportURL = [[NSURL fileURLWithPath:exportFile] retain];
    exporter.outputURL = exportURL; 

    [exporter exportAsynchronouslyWithCompletionHandler:
     ^{
         NSData *data = [NSData dataWithContentsOfURL:exportURL];

         // Here your upload code 
     }];
}