1.图片链接资源需要带有宽高信息
例如：https://zmkx.oss-cn-hangzhou.aliyuncs.com/oss/folder/atui2024-12-231734938007236a30cb975297842d0b3d2b82e4ec7f72b7unhmlcaj4el.jpg?Size=1080x2388
在链接中拼接?Size=1080x2388携带。
2.获取到数据后切割出宽高
List<Map<String, dynamic>> _swiperDataUrl; //轮播图数据源/*
* 计算轮播图图片高度
* articlePic: 请求接口获取到的图片集合
* */_maxSwiperHeight(List articlePic) {if(articlePic == null || articlePic.isEmpty){return;}List<Map<String, dynamic>> _swiperHeight = [];double width;double height;//切割出图片宽高信息articlePic.forEach((element) {if(element.type == 'P'){String url = element.url;List<String> strList =url.contains('?Size=')? url.split('?Size='): url.contains('?size=')? url.split('?size='): null;if (strList != null && strList.length >= 1) {url = strList.last;List<String> size = url.split('x');width = double.parse(size[0]);height = double.parse(size[1]);double screenWidth = _articleDetail.redirectFlag == 1? getScreenWidth() - 40: getScreenWidth();//配置每张图片显示时轮播控件需要的高度 if (width > screenWidth) {height = height / (width / screenWidth);} else {height = height * (screenWidth / width);}if(height > screenWidth * 1.3){height = screenWidth * 1.3;}} else {height = 500.h;}// 轮播图资源链接_swiperHeight.add({"url": element.url, "height": height.ceilToDouble(),'type':'P'});setState(() {_swiperDataUrl = _swiperHeight;});}});}
3.显示轮播图
int _currentImageIndex = 0;_swiperView(){return// 图片_articleDetail.articleType == 1? _swiperDataUrl!=null? AnimatedContainer(duration: Duration(milliseconds: 300),width: winWidth(context: context),height: _swiperDataUrl[_currentImageIndex]['height'],color: Colors.white,child: Swiper(controller: _swiperController,itemCount: _swiperDataUrl.length,loop: false,autoplay: false,onIndexChanged: (index){setState(() {_currentImageIndex = index;});},itemBuilder: (BuildContext context, int index) {return GestureDetector(onTap: () {_toViewBigPhoto(context, _articleDetail.articlePic, index);},child: _swiperDataUrl[index]['type'] == 'P'?CachedNetworkImage(fit: BoxFit.cover,imageUrl: _swiperDataUrl[index]['url'],width: double.infinity,):_swiperDataUrl[index]['type'] == 'V'?ClipRRect(child: ArticleDetailVideoPage(_articleDetail.articlePic[index].url,mute: true,toFullScreenPage: false,clickVideoCallback: _toOriginalArticle,),):SizedBox(),);},pagination: SwiperPagination(builder: DotSwiperPaginationBuilder(size: 7,color: Color(0xff999999),activeColor: Color(0xffffffff))),)) : SizedBox()// 视频: _articleDetail.articleType == 2? _videoView(): SizedBox();}
