将MPMediaItemCollection转换为Nsdata

Question

我已经通过下面的代码从MPMediaPickerController导入了一个.mp3文件：

MPMediaPickerController *mediaPicker = [[MPMediaPickerController alloc] initWithMediaTypes: MPMediaTypeAny];

    mediaPicker.delegate = self;
    mediaPicker.allowsPickingMultipleItems = YES;
    mediaPicker.prompt = @"Select songs to play";

    [self presentModalViewController:mediaPicker animated:YES];
    [mediaPicker release];

现在，我想将选定的.mp3文件转换为NSDATA，这样我就可以将该nsdata文件上传到服务器上：

- (void) mediaPicker: (MPMediaPickerController *) mediaPicker didPickMediaItems: (MPMediaItemCollection *) mediaItemCollection
{

    MPMusicPlayerController *musicPlayer = [MPMusicPlayerController iPodMusicPlayer];
    [musicPlayer setQueueWithItemCollection: mediaItemCollection];

    NSLog(@"==>%@",musicPlayer);
    [musicPlayer play];
    [self dismissModalViewControllerAnimated: YES];
}

我的主要问题是如何将音乐文件转换成NSDATA或任何其他格式，通过这些格式我可以将它上传到server.Can中，然后在下载与音频文件相同的文件后可以很容易地使用它

Answer 1

您可以使用此命令转换.mp3或任何要转换为nsdata的媒体文件:-

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

NSURL *soundFileURL = [NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/memo.m4a", documentsDirectory]];;
NSData *myData = [NSData dataWithContentsOfURL:soundFileURL];

return myData;