8

这是我的代码，从这里复制：

SliverAppBar(
  expandedHeight: 150.0,
  flexibleSpace: const FlexibleSpaceBar(
      title: Text('Available seats'),
    ),
    actions: < Widget > [
      IconButton(
        icon: const Icon(Icons.add_circle),
          tooltip: 'Add new entry',
          onPressed: () { /* ... */ },
      ),
    ]
)

但我需要添加一个Drawer. 我怎样才能做到这一点？
我正在尝试在 Flutter 中重建我的应用程序。
将 java android 应用程序转换为颤振

我替换了图标，但我怎样才能创建一个Drawer？

leading: IconButton(icon: Icon( Icons.menu ),onPressed: ()=>{},)

我的完整代码

@override
  Widget build(BuildContext context) {

  return NestedScrollView(
      headerSliverBuilder: (BuildContext context, bool innerBoxIsScrolled) {
        return <Widget>[
          SliverAppBar(
            leading: IconButton(
              icon: Icon(Icons.menu),
              onPressed: () => {},
            ),
            actions: <Widget>[
              IconButton(
                onPressed: () => {},
                icon: Icon(Icons.shopping_cart),
              )
            ],
            expandedHeight: 200.0,
            floating: false,
            pinned: true,
            flexibleSpace: FlexibleSpaceBar(
                centerTitle: true,
                title: Text("My Pet Shop",
                    style: TextStyle(
                      color: Colors.white,
                      fontSize: 16.0,
                    )),
                background: Image.network(
                  "https://firebasestorage.googleapis.com/v0/b/my-pet-world.appspot.com/o/images%2Fbannerads%2FxTmAblJI7fMF1l0nUa1gM32Kh9z1%2F734rm6w7bxznp%2FPETWORLD-HOME-SLIDER-KITTENS.webp?alt=media&token=cf7f48bb-6621-47b3-b3f8-d8b36fa89715",
                  fit: BoxFit.cover,
                )),
          ),
        ];
      },
      body: Container(
        margin: EdgeInsets.only(top: 0),
        child: Column(
          children: <Widget>[
            Expanded(
              //getHomePageWidget()
              child: ListView(
                padding: EdgeInsets.all(0.0),
                children: <Widget>[getHomePageWidget()],
              ),
            )
          ],
        ),
      ));
 }
4

1 回答 1

19

Drawer 是 Scaffold 的属性。设置抽屉属性后，菜单图标将自动出现在 SliverAppBar 中。

在你的构建方法中返回这个，你会得到你想要的。

  return Scaffold(
    body: CustomScrollView(
      slivers: <Widget>[
        SliverAppBar(
          expandedHeight: 200.0,
          flexibleSpace: const FlexibleSpaceBar(
            title: Text('Available seats'),
          ),
          actions: <Widget>[
            IconButton(
              icon: const Icon(Icons.add_circle),
              tooltip: 'Add new entry',
              onPressed: () {},
            ),
          ],
        ),
        SliverList(
          delegate: SliverChildListDelegate([
            getHomePageWidget(),
          ]),
        ),
      ],
    ),
    drawer: Drawer(),
  );

注意：如果您Scaffold在上面的树中有多个，CustomScrollView则Drawer应该在最底部Scaffold

于 2018-12-31T12:05:16.557 回答