cause Error : - Modifying state during view update, this will cause undefined behavior. ScannerViewController,isGalleryShowing didSet. <img width="1436" alt="截屏2022-05-28 09 32 51" src="https://user-images.githubusercontent.com/93469537/170805281-ff15505b-2755-4dfb-a5fe-a9cc7ffd79d6.png">