c# - UIImagePickerController' 不包含 'DismissModalViewControllerAnimated' Xamarin iOS 的定义

Question

我正在开发一个适用于 iOS 的应用程序，它可以拍照并将其保存到相机胶卷中我在 DismissModalViewController 上收到此错误:

   Severity CodeError   CS1061  'UIImagePickerController' does not contain a definition for 'DismissModalViewControllerAnimated' and no extension method 'DismissModalViewControllerAnimated' accepting a first argument of type 'UIImagePickerController' could be found (are you missing a using directive or an assembly reference?)

我不知道我做错了什么这是我的类(class)代码:

using Foundation;
using System;
using System.CodeDom.Compiler;
using UIKit;
using CoreGraphics;
using AssetsLibrary;


namespace ToolBelt.iOS
{
    partial class Camera : UIViewController
    {
        public Camera (IntPtr handle) : base (handle)
        {
        }

        UIImagePickerController imagePicker;
        UIImagePickerController picker = new UIImagePickerController();

        public override void ViewDidAppear(bool animated)
        {
            base.ViewDidAppear(animated);

            imagePicker = new UIImagePickerController();
            imagePicker.PrefersStatusBarHidden();

            imagePicker.SourceType = UIImagePickerControllerSourceType.Camera;

            //Add event handlers when user finished Capturing image or Cancel
            imagePicker.FinishedPickingMedia += Handle_FinishedPickingMedia;
            imagePicker.Canceled += Handle_Canceled;

            //present 
            PresentViewController(picker, true, () => { });
        }

        protected void Handle_FinishedPickingMedia(object sender, UIImagePickerMediaPickedEventArgs e)
        {
            // determine what was selected, video or image
            bool isImage = false;
            switch (e.Info[UIImagePickerController.MediaType].ToString())
            {
                case "public.image":
                    Console.WriteLine("Image selected");
                    isImage = true;
                    break;
                case "public.video":
                    Console.WriteLine("Video selected");
                    break;
            }

            // get common info (shared between images and video)
            NSUrl referenceURL = e.Info[new NSString("UIImagePickerControllerReferenceUrl")] as NSUrl;
            if (referenceURL != null)
                Console.WriteLine("Url:" + referenceURL.ToString());

            // if it was an image, get the other image info
            if (isImage)
            {
                // get the original image
                UIImage originalImage = e.Info[UIImagePickerController.OriginalImage] as UIImage;
                if (originalImage != null)
                {
                    // do something with the image
                    Console.WriteLine("got the original image");
                    imageView.Image = originalImage; // display
                }
            }
            else
            { // if it's a video
              // get video url
                NSUrl mediaURL = e.Info[UIImagePickerController.MediaURL] as NSUrl;
                if (mediaURL != null)
                {
                    Console.WriteLine(mediaURL.ToString());
                }
            }
            // dismiss the picker
            imagePicker.DismissModalViewControllerAnimated(true);
        }

        void Handle_Canceled(object sender, EventArgs e)
        {
            imagePicker.DismissModalViewControllerAnimated(true);
        }
    }
}

我正在使用 Xamarin iOS 制作此应用。

Answer 1

您应该使用 imagePicker.DismissViewController(true, null); 关闭图像选择器。

第一个参数表示 Controller 是否被关闭动画。

第二个参数是动画完成时调用的方法。