问动态添加的微件仅在路由更改后才起作用

EN

return SliverList(
  delegate: SliverChildBuilderDelegate(
        (context, index) => Card(
      child: InkWell(
        child: Slidable(
          key: Key(_fileList[index].key),
          actionPane: SlidableDrawerActionPane(),
          child: Container(
            child: ListTile(
              onTap: () {
                ...
              },
              title: Text(_fileList[index].subtitle),
              subtitle: Text(_fileList[index].subtitle),
            ),
          ),
          secondaryActions: <Widget>[
            IconSlideAction(
                caption: 'Delete',
                color: Colors.red,
                icon: Icons.delete,
                onTap: () {
                  ...
                }
            ),
          ],
        ),
      ),
    ),
    childCount: _fileList.length,
  ),
);

setState(() {
  _fileList = newFileList;
});