UIImagePickerController 允许编辑不起作用 [英] UIImagePickerController AllowsEditing not working

问题描述

我使用 UIImagePickerController 来允许用户拍照.我想让他/她事后编辑它，但是，无论我做什么，我都一无所获.

I am using UIImagePickerController to allow the user to take a picture. I want to allow him/her to edit it afterwards but, whatever I do, I get nothing.

这是我的代码(我使用的是 Xamarin):

Here is my code (I am using Xamarin):

UIImagePickerController imagePicker = new UIImagePickerController ();
                // set our source to the camera
                imagePicker.SourceType = UIImagePickerControllerSourceType.Camera;
                // set what media types
                //imagePicker.MediaTypes = UIImagePickerController.AvailableMediaTypes (UIImagePickerControllerSourceType.Camera);
                // show the camera controls
                imagePicker.ModalPresentationStyle = UIModalPresentationStyle.CurrentContext;
                imagePicker.ShowsCameraControls = true;
                imagePicker.AllowsEditing = true;
                imagePicker.SetEditing (true,true);
                imagePicker.PreferredContentSize = new SizeF(900,600);
                imagePicker.CameraCaptureMode = UIImagePickerControllerCameraCaptureMode.Photo;
                imagePicker.Title="taste.eat. image";
                // attach the delegate
                imagePicker.Delegate = new ImagePickerDelegate();
                // show the picker
                NavigationController.PresentViewController(imagePicker, true,null);

我错过了什么吗?

我已经按照教程操作，我正在使用矩形进入屏幕，但是如果我平移或缩放它，一旦我抬起手指，它就会回到中心.是否可以从照片应用程序进入此屏幕?

I have followed the tutorial and I am getting to the screen with the rectangle, but if i pan or zoom it just snaps back to the center once I lift my finger. Is it possible to get to this screen from the photos application?

推荐答案

当使用UIImagePickerController's delegate方法 - imagePickerController:didFinishPickingMediaWithInfo:，我们使用

When using UIImagePickerController's delegate method - imagePickerController:didFinishPickingMediaWithInfo:, we get the image using

UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];

此代码将始终返回原始图像，即使编辑处于打开状态.

This code will always return the original image, even if editing is ON.

尝试使用

UIImage *image = [info objectForKey:UIImagePickerControllerEditedImage];

如果编辑打开，这将返回编辑后的图像.

This will return the edited image if editing is ON.

希望这会有所帮助.

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