Ios XCode 9.0：错误域=PlugInKit代码=13“；查询已取消"；允许权限后出错

更新Xcode后，在模拟器上运行我的应用程序时，我遇到了这个错误。我查看了其他与此错误相关的SO问题，它们都与权限有关。但即使包含了请求权限的代码，并确保我的

Info.plist

中有

Photo Library Usage

，我仍然会收到错误

- (void)viewDidAppear:(BOOL)animated
{


    [super viewDidAppear:animated];

    [PHPhotoLibrary requestAuthorization:^(PHAuthorizationStatus status) {
        switch (status) {
            case PHAuthorizationStatusAuthorized:
                NSLog(@"PHAuthorizationStatusAuthorized");
                ipc = [[UIImagePickerController alloc] init];
                ipc.delegate = self;
                if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
                {
                    ipc.sourceType = UIImagePickerControllerSourceTypeCamera;
                    ipc.showsCameraControls = NO;
                    ipc.tabBarController.tabBar.hidden = YES;
                    ipc.allowsEditing = NO;

                    [self addChildViewController:ipc];
                    [self.view addSubview:ipc.view];
                    [ipc didMoveToParentViewController:self];

                }else{
                    ipc.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
                    //launch image picker view controller
                    ipc.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
                    [self presentViewController:ipc animated:YES completion:nil];

                }
                break;
            case PHAuthorizationStatusDenied:
                NSLog(@"PHAuthorizationStatusDenied");
                break;
            case PHAuthorizationStatusNotDetermined:
                NSLog(@"PHAuthorizationStatusNotDetermined");
                break;
            case PHAuthorizationStatusRestricted:
                NSLog(@"PHAuthorizationStatusRestricted");
                break;
        }
    }];
}

当我点击此视图的选项卡时，我只看到用于LibraryControlSource的IPC视图控制器在屏幕上向上滑动，然后不停地向下（好像被取消）。每次它向上滑动时，我都会在控制台中看到

Error Domain=PlugInKit code=13“query cancelled”

错误