add img choice

ui_functions.py

@@ -11,7 +11,8 @@ def change_img_choices(sample_size):
         choices.append(
             '图片{}(img_{})'.format(i+1,i+1)
         )
-    return choices
+    update_choices = gr.update(choices=choices)
+    return update_choices
 
 def change_image_editor_mode(choice, cropped_image, masked_image, resize_mode, width, height):
     if choice == "Mask":