直播軟體開發，自動滾動banner實現的相關程式碼

@override
 Widget build(BuildContext _buildContext) {
  int banLen = _banner.length;
  double width = ViewUtils.getScreenWidth(_buildContext);
  double curWidth = width * 0.92;
  double curHeight = curWidth * 187 / 670;
  return (banLen > 0)
    ? Container(
      margin: EdgeInsets.only(top: ViewUtils.currentHeight(38.0)),
      width: width,
      height: curHeight,
      child: Column(
       children: <Widget>[
        Expanded(
         flex: 1,
         child: Swiper(
          containerHeight: ViewUtils.currentHeight(100.0),
          controller: SwiperController(),
          itemBuilder: (BuildContext context, int index) {
           return _itemBuilder(index,curWidth,curHeight);
          },
          loop: true,
          duration: 300,
          autoplay: true,
          scrollDirection: Axis.horizontal,
          itemCount: banLen,
          viewportFraction: 0.92,
          // 當前視窗展示比例 小於1可見上一個和下一個視窗
          scale: 0.96, // 兩張圖片之間的間隔
         ),
        ),
       ],
      ),
     )
    : Container();
 }

​ 最後設定圓角

_itemBuilder(_index,_curWidth,_curHeight ){
  String imgUrl = _banner[_index].imgUrl;
  return GestureDetector(
   onTap: () {
   
   },
   child: Container(
    width: _curWidth,
    height: _curHeight,
    decoration: BoxDecoration(
      gradient: const LinearGradient(
        colors: [Color(0xFF819FF5), Color(0xFF4A66E7)]),
      borderRadius: BorderRadius.all(
       Radius.circular(10),
      ),
      image: DecorationImage(
       image: NetworkImage(imgUrl),
       fit: BoxFit.fitWidth,
      )),
   ),
  );
 }

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