Added completion delegate function

GBHFacebookImagePicker/Classes/Controller/GBHFacebookAlbumPicker.swift

@@ -280,7 +280,9 @@ class GBHFacebookAlbumPicker: UITableViewController, GBHAlbumPickerTableViewCont
 
     func dismissPicker() {
         DispatchQueue.main.async {
-            self.dismiss(animated: true, completion: nil)
+            self.dismiss(animated: true, completion: {
+                self.delegate?.facebookImagePickerDismissed()
+            })
         }
     }
 }

GBHFacebookImagePicker/Classes/Controller/GBHFacebookImagePickerDelegate.swift

@@ -47,4 +47,7 @@ public protocol GBHFacebookImagePickerDelegate {
      ///
      /// - Parameter imagePicker: the picker controller
      func facebookImagePicker(didCancelled imagePicker: UIViewController)
+
+    /// Called when image picker completed dismissing
+    func facebookImagePickerDismissed()
 }