我想设置捏手势放大和缩小故事视图小部件。我已经尝试了手势检测器，但它不会工作，它不允许任何其他部件在它。

body: StoryView(
    storyItems: new List.generate(
      3,
      (index) => StoryItem.pageImage(
        duration: Duration(seconds: 7),
        url: widget.image['map${n + 1}'][index],
        controller: storycontroller,
        
      ),
    ),
    controller: storycontroller,
    onStoryShow: (s) {
      print('Story Started');
      // set();
    },
    onComplete: () {
      print('Story Completed');
      print(n);
    },
    progressPosition: ProgressPosition.top,
    repeat: false,
  )