Using the UIImagePickerController image editor separately

When you are using an UIImagePickerController, you have a property called allowsImageEditing, which makes it possible to zoom in/crop/etc a picture, after you picked a picture (from camera or library).

I would like to use this editor just with an UIImag开发者_如何学运维e as a source, the images are loaded from the internet and I want the user to be able to select either a part of an image or zoom in/out on the image, before it is saved to the device.

Is this possible? I cant find an easy way to do this.

This is not possible. UIImagePickerController is just for the camera and/or library.

You may find the TTPhotoViewController (and TTThumbsViewController) from the Three20 project useful.
Apparently that project now even has its own stack exchange: Three20 Scope.