ios - 无法在 iOS 8.1.3 上关闭 MPMediaPickerController

Question

我可以看到歌曲列表并选择歌曲。但是我不能在按下“完成”时关闭 View Controller 。我已经尝试过 PresentViewController，因为不推荐使用 Modal Controller 。

- (IBAction) showMediaPicker: (id) sender {

    picker =
    [[MPMediaPickerController alloc] initWithMediaTypes: MPMediaTypeAnyAudio];

    picker.delegate                     = self;
    picker.allowsPickingMultipleItems   = YES;
    picker.prompt                       = NSLocalizedString (@"AddSongsPrompt", @"Prompt to user to choose some songs to play");

    [[UIApplication sharedApplication] setStatusBarStyle: UIStatusBarStyleDefault animated:YES];
    [self.picker removeFromParentViewController];
  [self presentViewController:picker animated:YES completion:nil];
   // [picker release];
}


// Responds to the user tapping Done after choosing music.
- (void) mediaPicker: (MPMediaPickerController *) mediaPicker didPickMediaItems: (MPMediaItemCollection *) mediaItemCollection {
    [self.picker removeFromParentViewController];
        [self dismissViewControllerAnimated:YES completion:nil];
   //
    [self.delegate updatePlayerQueueWithMediaCollection: mediaItemCollection];
   // [self.mediaItemCollectionTable reloadData];

   // [[UIApplication sharedApplication] setStatusBarStyle: UIStatusBarStyleBlackOpaque animated:YES];
}

我也尝试过 RemovefromSuperview ，似乎没有任何效果。我正在 iPhone 6 模拟器和带有 iOS 8.1.3 的 iPhone 5 上对此进行测试。

任何人？？？

Answer 1

我测试了您的代码并删除了一些对 removeFromParentViewController: 的调用因为我认为它们没有必要。

- (IBAction)showMediaPicker:(id)sender {
    MPMediaPickerController *picker = [[MPMediaPickerController alloc] initWithMediaTypes:MPMediaTypeAnyAudio];

    picker.delegate = self;
    picker.allowsPickingMultipleItems = YES;
    picker.prompt = @"Some Prompt";

    [self presentViewController:picker animated:YES completion:nil];
}

// mediaPicker:didPickMediaItems: will be called if at least one song was selected
- (void)mediaPicker:(MPMediaPickerController *)mediaPicker didPickMediaItems:(MPMediaItemCollection *)mediaItemCollection {
    [mediaPicker dismissViewControllerAnimated:YES completion:nil];
}

// mediaPickerDidCancel: will be called if no songs were selected
- (void)mediaPickerDidCancel:(MPMediaPickerController *)mediaPicker {
    [mediaPicker dismissViewControllerAnimated:YES completion:nil];
}

确保您的 .h -文件包括 MPMediaPickerControllerDelegate协议(protocol)。