Another exception was thrown: The PrimaryScrollController is currently attached to more than one Scr
问题：给ListView列表添加滚动条的时候会报错
[Another exception was thrown: The PrimaryScrollController is currently attached to more than one ScrollPosition.]
页面滚动的 ScrollController 里面有Scrollbar/ SmartRefresher/ ListView.builder
这里报错意思是 ScrollController 控制了多个组件里面的滚动
解决方法：
给滚动组件都建一个controller，因为我用到了滚动组件pull_to_refresh，处理如下
Scrollbar(controller: controller, // 这里child: SmartRefresher(enablePullDown: true,enablePullUp: true,header: RefreshConfig.refreshHeader(),footer: RefreshConfig.refreshFooter(),controller: _refreshController,onRefresh: _onRefresh,onLoading: _onLoading,child: ListView.builder(controller: controller, // 这里shrinkWrap: true,addAutomaticKeepAlives: true,physics: const BouncingScrollPhysics(parent: AlwaysScrollableScrollPhysics(),),itemBuilder: (BuildContext context, int index) {return buidListItem(_listModel.list[index], _listModel, index);},itemCount: _listModel.list.length,),
);
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