1、UI效果图：

2、中间镂空UI：

class CenterTransparentMask extends CustomClipper<Path> {final double? width;CenterTransparentMask({this.width});@overridePath getClip(Size size) {final path = Path()..addRect(Rect.fromLTWH(0, 0, size.width,size.height + MediaQuery.of(Get.context!).padding.bottom))..addRect(Rect.fromLTWH((size.width - (width ?? 200)) / 2,(size.height +MediaQuery.of(Get.context!).padding.bottom -(width ?? 200)) /2,width ?? 200,width ?? 200));return path..fillType = PathFillType.evenOdd; }@overridebool shouldReclip(CustomClipper<Path> oldClipper) {return false;}
}

3、扫码UI：

class ScanWidget extends StatefulWidget {const ScanWidget({super.key});@overrideState<ScanWidget> createState() => _ScanWidgetState();
}class _ScanWidgetState extends State<ScanWidget> with TickerProviderStateMixin {late Animation<double> animation;late AnimationController _controller;@overridevoid initState() {super.initState();initAnima();}void initAnima() {_controller = AnimationController(duration: const Duration(seconds: 4),vsync: this,);animation = Tween(begin: -100.0, end: 100.0).animate(_controller)..addListener(() {if (mounted) setState(() => {});});_controller.repeat();}@overridevoid dispose() {_controller.dispose();super.dispose();}@overrideWidget build(BuildContext context) {return Stack(alignment: Alignment.center,children: [_scanBorder(),_scanCenter(context),Transform.translate(offset: Offset(0, animation.value),child: _scanLine(),),],);}Widget _scanCenter(BuildContext context) {return ClipPath(clipper: CenterTransparentMask(), child: BackdropFilter(filter: ImageFilter.blur(sigmaX: 2, sigmaY: 2),child: Container(color: Colors.black.withOpacity(0.5),width: SystemUtil().getScreenWidth(context),height: SystemUtil().getScreenHeight(context),),),);}Widget _scanBorder() {return Image.asset(ImageUtils.getImgPath("img_border", "scan"),width: 200,height: 200,);}Widget _scanLine() {return Image.asset(ImageUtils.getImgPath("image_line", "scan"),width: 200,height: 6,);}
}

3、图片加载工具类：

class ImageUtils {static String getImgPath(String name, String moduleName,{String format = "png"}) {return "assets/images/$moduleName/$name.$format";}
}