flutter 轮播图Swiper组件
/* 轮播图组件 使用组件方式: ImgSwiper(arrList: arrList) 数据结构:[{'src':'图片网络地址','url':'窗口跳转路由地址'}] */ class ImgSwiper extends StatefulWidget { final List arrList; final double height; final double radius; final int seconds; final EdgeInsetsGeometry margin; const ImgSwiper({ Key? key, required this.arrList, this.seconds = 3, //轮播时间 this.radius = 2, //度数越小越圆 this.height = 3, //宽度的比例数 this.margin = const EdgeInsets.fromLTRB(10, 5, 10, 2), }) : super(key: key); @override _ImgSwiperState createState() => _ImgSwiperState(); } class _ImgSwiperState extends State<ImgSwiper> { int intTap = 0; late Timer xTimer; @override void initState() { super.initState(); xTimer = Timer.periodic(Duration(seconds: widget.seconds), (timer) { intTap++; if (intTap >= widget.arrList.length) { intTap = 0; } setState(() {}); }); } @override void dispose() { xTimer.cancel(); super.dispose(); } @override Widget build(BuildContext context) { final size = MediaQuery.of(context).size; return Stack( children: [ Container( width: size.width, height: (size.width / widget.height), margin: widget.margin, decoration: BoxDecoration( color: const Color.fromARGB(123, 225, 225, 235), borderRadius: BorderRadius.circular(size.width / widget.radius), ), clipBehavior: Clip.hardEdge, child: PageView.builder( onPageChanged: (index) { intTap = index % widget.arrList.length; setState(() {}); }, itemBuilder: (context, index) { return InkWell( onTap: () { if (widget.arrList[intTap]["url"] != null) { Navigator.of(context).push( MaterialPageRoute( builder: (BuildContext context) => widget.arrList[intTap]["url"], // 跳转页面路由 ), ); } }, child: Image.network( widget.arrList[intTap]["src"]!, fit: BoxFit.cover, key: UniqueKey(), ), ); }, ), ), Positioned( right: 1, bottom: -5, child: Container( padding: const EdgeInsets.all(10), alignment: Alignment.center, decoration: const BoxDecoration( color: Color.fromARGB(190, 238, 241, 245), borderRadius: BorderRadius.only( topLeft: Radius.circular(30), ), ), child: Text( "${intTap + 1}/${widget.arrList.length}", style: const TextStyle( color: Color.fromARGB(255, 155, 147, 147), fontWeight: FontWeight.bold, fontStyle: FontStyle.italic, ), ), ), ), ], ); } }
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