Question

I use UIImagePickerController to select an image. i get following keys from info class.

UIImagePickerControllerOriginalImage = MonoTouch.UIKit.UIImage    
UIImagePickerControllerReferenceURL = assets-library://asset/asset.PNG?id=1000000001&ext=PNG    
UIImagePickerControllerMediaType = public.image

i can not use reference url to use this image later. what can i do to use this reference?

imageURL = e.Info[new NSString ("UIImagePickerControllerReferenceURL")].ToString ();

imageBackground = UIImage.FromFile (imageURL);

Answer 1

I’m pretty sure iOS doesn’t allow you direct access to the image file on purpose. Rather it creates a copy of the image (in the form of UIImagePickerControllerOriginalImage ). So in order to get a UIImage object, you’ll be better off using:

UIImage image = (UIImage)info.ObjectForKey(new NSString("UIImagePickerControllerOriginalImage"));

EDIT

you could try saving the UIImage to your apps documents area then picking it up again. So something along the lines of:

UIImage image = (UIImage)info.ObjectForKey(new NSString("UIImagePickerControllerOriginalImage"));
NSData imageData = image.AsPNG();
imageData.Cast<Byte>();
byte[] imageBytes = new byte[imageData.Length];
int length = (int)imageData.Length;
Marshal.Copy(imageData.Bytes, imageBytes, 0, length);
string destPath = Environment.GetFolderPath(Environment.SpecialFolder.Personal);
string fileName = "picture.png";
string filePath = Path.Combine(destPath, fileName);
File.WriteAllBytes(filePath, imageBytes);

I haven’t been able to verify this works but it should give you a starting point. You can then access the file later on in the app. Just remember to delete the file once you’ve finished with it!