尝试从相机添加附件时，iOS 11应用程序崩溃

Question

我有一个应用程序在用户尝试从相机添加附件时崩溃（但是当他们选择从照片库加载附件时它不会崩溃）。

以下是选择选项（相机或照片库）时调用的方法：

    public void AddMedia(UIImagePickerControllerSourceType type)
    {
        _imagePicker = new UIImagePickerController();

        // set our source to the photo library
        _imagePicker.SourceType = type;

        // set what media types
        _imagePicker.MediaTypes = UIImagePickerController.AvailableMediaTypes(type);

        _imagePicker.FinishedPickingMedia += Handle_FinishedPickingMedia;

        _imagePicker.Canceled += (sender, evt) =>
        {
            Console.WriteLine("picker cancelled");
            _imagePicker.DismissViewController(false, () =>
                {
                });
        };

        //PresentModalViewController is depreciated in iOS6 so we use PresentViewController
        Parent.PresentViewController(_imagePicker, true, null);
    }

这就是它崩溃的路线：

        _imagePicker.SourceType = type;

为什么在将其设置为相机而不是照片库时会崩溃？它与enum的排序方式有关（Photo Library = 0，Camera = 1，Saved Photos Album = 2）？

Answer 1

您是否尝试在模拟器上重现它？因为您无法访问相机。