Question

我试图通过Button动作呈现UIImagePickerController。我的项目因错误而崩溃：

执行本机代码时获得了SIGABRT。这通常表明单声道运行时或其中一个本机库中的致命错误由您的应用程序使用。

我只在Storyboard中的NavigationController中嵌入了一个ViewController。下面的代码片段：

UIImagePickerController imagePicker;

public override void ViewDidLoad()
{
    base.ViewDidLoad();

    this.setupImagePicker();

    CapturePhotoButton.TouchUpInside += delegate
    {
        this.AddMedia();
    };
}

public void setupImagePicker()
{
    imagePicker = new UIImagePickerController();
    imagePicker.SourceType = UIImagePickerControllerSourceType.Camera;
    imagePicker.ModalPresentationStyle = UIModalPresentationStyle.Popover;
    imagePicker.MediaTypes = UIImagePickerController.AvailableMediaTypes(
        UIImagePickerControllerSourceType.Camera);
    imagePicker.FinishedPickingMedia += HandleFinishedPickingMedia;
    imagePicker.Canceled += (sender, e) => {
        imagePicker.DismissModalViewController(true);
    };
}

public void HandleFinishedPickingMedia(object sender, 
    UIImagePickerMediaPickedEventArgs e)
{
    bool isImage = false;

    switch (e.Info[UIImagePickerController.MediaType].ToString())
    {
        case "public.image":
            isImage = true;
            break;
        case "public.video":
            break;
    }

    if (isImage)
    {
        UIImage originalImage = e.Info[UIImagePickerController.OriginalImage] as UIImage;
        if (originalImage != null)
        {
            PreviewImageView.Image = originalImage;
            imagePicker.DismissViewController(true, null);
        }
    }
}

public void AddMedia()
{
    //Crashes on this line
    this.NavigationController.PresentViewController(imagePicker, true, null);
}

Answer 1

为您的info.plist添加了隐私 - 相机使用说明，解决了问题

Answer 2

将以下内容添加到info.plist以供相机使用：

<key>NSCameraUsageDescription</key>
<string>This app needs access to the camera to take photos.</string>

for library：

<key>NSPhotoLibraryUsageDescription</key>
<string>This app needs access to photos.</string>

呈现UIImagePickerController会崩溃应用程序

2 个答案: