android-是否有可能在Flutter中为SliverList中的按钮实现Dismissible小部件

所以可以说我建立了一个像这样的sliverlist.

return new Container(
              child: new CustomScrollView(
            scrollDirection: Axis.vertical,
            shrinkWrap: false,

            slivers: <Widget>[
              new SliverPadding(
                padding: const EdgeInsets.symmetric(vertical: 2.0),
                sliver: new SliverList(
                  delegate: new SliverChildBuilderDelegate(
                      (BuildContext context, int index) {
                    ModelClass class= _List[index];

                    return new dismissible(
                      key: new ObjectKey(_List[index]),
                      child: ModelCard(class),
                      ondismissed: (dismissDirection direction) {
                        setState(() {
                          _List.removeAt(index);

                          direction == dismissDirection.endToStart;
                        });
                      },
                      background: new Container(
                          color: const Color.fromrGBO(183, 28, 28, 0.8),
                          child: new Center(
                            child: new Text(
                              "Item Removed",
                              style: new TextStyle(color: Colors.white),
                            ),
                          )),

                    );

                    // return new ModelCard(class);
                  }, childCount: _List.length),
                ),
              ),
            ],
          ));

现在我有一个名为ModelCard的无状态小部件,可以像这样填充列表

   new Container(
                    padding: EdgeInsets.fromLTRB(80.0, 10.0, 0.0, 0.0),
                    child: new Text(
                      "${class.listDescription}",
                      style: new TextStyle(),
                    ),
                  ),

现在我想有一个图标按钮来关闭一个项目,所以我将其添加到卡中

new Container(
                    padding: EdgeInsets.fromLTRB(350.0, 20.0, 0.0, 0.0),
                    child: new IconButton(
                        icon: new Icon(Icons.delete), onpressed: () {}),
                  ),

您如何在按下图标时在可弹出的菜单按钮中实现可消除的窗口小部件呢？

解决方法:

好的,已经有一个可以满足您需求的软件包.

https://pub.dartlang.org/packages/flutter_slidable

A Flutter implementation of slidable list item with directional slide
actions that can be dismissed.

用法：

  new Slidable(
    delegate: new SlidableScrollDelegate(),
    actionExtentRatio: 0.25,
    child: new Container(
      color: Colors.white,
      child: new ListTile(
        leading: new CircleAvatar(
          backgroundColor: Colors.indigoAccent,
          child: new Text('$3'),
          foregroundColor: Colors.white,
        ),
        title: new Text('Tile n°$3'),
        subtitle: new Text('SlidableDrawerDelegate'),
      ),
    ),
    actions: <Widget>[
      new IconSlideAction(
        caption: 'Archive',
        color: Colors.blue,
        icon: Icons.archive,
        onTap: () => _showSnackBar('Archive'),
      ),
      new IconSlideAction(
        caption: 'Share',
        color: Colors.indigo,
        icon: Icons.share,
        onTap: () => _showSnackBar('Share'),
      ),
    ],

    );