使用 UIImagePickerController 时 iOS 10 错误 [访问]

我正在使用XCode8，并使用iOS 10.2Beta进行测试.

我已经将照片、PhotoUI和MobileCoReserves框架添加到项目中.

非常简单的代码:

#import <Photos/Photos.h>
#import <PhotosUI/PhotosUI.h>
#import <MobileCoreServices/MobileCoreServices.h>

@interface ViewController : UIViewController <UIImagePickerControllerDelegate, UINavigationControllerDelegate, PHLivePhotoViewDelegate>

@property (strong, nonatomic) IBOutlet UIImageView *imageview;

@end

和实施:

- (IBAction)grab:(UIButton *)sender{
    UIImagePickerController *picker = [[UIImagePickerController alloc]init];
    picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    picker.allowsEditing = NO;
    picker.delegate = self;

    // make sure we include Live Photos (otherwise we'll only get UIImages)
    NSArray *mediaTypes = @[(NSString *)kUTTypeImage, (NSString *)kUTTypeLivePhoto];
    picker.mediaTypes = mediaTypes;

    // bring up the picker
    [self presentViewController:picker animated:YES completion:nil];
}

我一按按钮，应用程序就会崩溃，并出现非常无用的错误:

[access] <private>个

就这样.没别的了.

使用break语句，应用程序似乎在"presentViewController"上崩溃.

这是一个全新的应用程序，除了抓取按钮之外，我的UI中没有其他任何东西.

此外，在iOS9.3上进行测试时，该功能运行良好.我是否遗漏了iOS10中可能会更改的内容？