如何在Xamarin.UITesting中与摄影机卷交互？

我一直在尝试在Xamarin.iOS中点击相机卷，当它在我的应用程序中打开时使用Xamarin.ui进行测试，但由于它是操作系统的一部分，我无法使用点击功能选择相机卷，然后选择图像。使用app.Repl（），它的显示方式如下：

[CalabashRootView]                                                              
  [UIWindow > ... > UILayoutContainerView]
    [UINavigationTransitionView > ... > _UISizeTrackingView]
      [_UIRemoteView] id: "RemoteViewBridge"
    [UINavigationBar] id: "Photos"
      [_UIBarBackground]
        [UIImageView]
        [UIVisualEffectView]
          [_UIVisualEffectBackdropView]
          [_UIVisualEffectSubview]
      [_UINavigationBarContentView]
        [_UIButtonBarStackView]
          [_UIButtonBarButton] label: "Cancel"
            [_UIModernBarButton] label: "Cancel"
              [UIButtonLabel] label: "Cancel",  text: "Cancel"
        [UILabel] label: "Photos",  text: "Photos"
      [UILabel] label: "Photos",  text: "Photos"
      [_UIButtonBarButton] label: "Cancel"
        [_UIModernBarButton] label: "Cancel"
          [UIButtonLabel] label: "Cancel",  text: "Cancel"
  [UIWindow > UILayoutContainerView]
    [UINavigationTransitionView > ... > UITableView]
      [WelcomeScreenCustomCell]
        [UITableViewCellContentView]
          [UIView]

我试图通过后门将图像推入照片选择过程，但似乎无法正常工作（这是我的AppDelegate）：

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有人有过这样的经历吗？有没有办法只选择一张图片？

你可以使用Nuget的插件MediaPlugin

不要忘记在indo.plist中添加NSCameraUsageDescription和NSPhotoLibraryUsageDescription，以便访问设备的相机和照片/视频库

<key>NSCameraUsageDescription</key>
<string>This app needs access to the camera to take photos.</string>
<key>NSPhotoLibraryUsageDescription</key>
<string>This app needs access to photos.</string>
<key>NSMicrophoneUsageDescription</key>
<string>This app needs access to microphone.</string>
<key>NSPhotoLibraryAddUsageDescription</key>
<string>This app needs access to the photo gallery.</string>

<key>NSCameraUsageDescription</key>
<string>This app needs access to the camera to take photos.</string>
<key>NSPhotoLibraryUsageDescription</key>
<string>This app needs access to photos.</string>
<key>NSMicrophoneUsageDescription</key>
<string>This app needs access to microphone.</string>
<key>NSPhotoLibraryAddUsageDescription</key>
<string>This app needs access to the photo gallery.</string>

async void TakePhoto()
    {
        await CrossMedia.Current.Initialize();

        if (!CrossMedia.Current.IsCameraAvailable || !CrossMedia.Current.IsTakePhotoSupported)
        {
            // No camera available.
            return;
        }

        var file = await CrossMedia.Current.TakePhotoAsync(new StoreCameraMediaOptions
        {
            Directory = "Sample",
            Name = "test.jpg"
        });

        if (file == null)
            return;

        var ImagePath = file.Path;
        //... do something you want
    }