UIImagePickerControllerで編集した画像を取得できないとき

func imagePickerController(picker: UIImagePickerController, didFinishPickingImage image: UIImage, editingInfo: [String : AnyObject]?) {
  let image = editingInfo![UIImagePickerControllerEditedImage] as! UIImage
}

ではうまくいかないので

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
  let image = info[UIImagePickerControllerEditedImage] as! UIImage
}

を使いましょう。