颤振NestedScrollView / SliverAppBar - 不需要底边距

Question

与抽屉式导航栏建设appbar：

@override
  Widget build(BuildContext context) {
    var drawerOptions = <Widget>[];
    for (var i = 0; i < widget.drawerItems.length; i++) {
      var d = widget.drawerItems[i];
      drawerOptions.add(new ListTile(
        leading: new Icon(d.icon),
        title: new Text(d.title),
        selected: i == _selectedDrawerIndex,
        onTap: () => _onSelectItem(i),
      ));
    }
    drawerOptions.add(
        new RaisedButton(onPressed: () => {}, child: new Text("Ustawienia")));

    return new Scaffold(
        body: NestedScrollView(
          headerSliverBuilder: (BuildContext context, bool innerBoxIsScrolled) {
            return <Widget>[
              SliverAppBar(
                expandedHeight: 130.0,
                floating: false,
                pinned: true,
                flexibleSpace: FlexibleSpaceBar(
                  title:
                      new Text(widget.drawerItems[_selectedDrawerIndex].title),
                ),
              ),
            ];
          },
          body: _getDrawerItemWidget(_selectedDrawerIndex),
        ),
        drawer: new Drawer(
          child: new Column(
            children: <Widget>[
              new UserAccountsDrawerHeader(
                  accountName: new Text("Gość"), accountEmail: null),
              new Column(children: drawerOptions)
            ],
          ),
        ));

结果：

因此，有不需要的白色边缘正上方的身体。如果我尝试定期appbar，这种方式：

return new Scaffold(
      appBar: new AppBar(
        // here we display the title corresponding to the fragment
        // you can instead choose to have a static title
        title: new Text(widget.drawerItems[_selectedDrawerIndex].title),
      ),
      drawer: new Drawer(
        child: new Column(
          children: <Widget>[
            new UserAccountsDrawerHeader(
                accountName: new Text("Gość"), accountEmail: null),
            new Column(children: drawerOptions)
          ],
        ),
      ),
      body: _getDrawerItemWidget(_selectedDrawerIndex),
    );

结果是好的，没有任何额外的保证金：

如何删除不需要的额外保证金和调整标题处于扩展状态到左（它应该在汉堡的菜单指示灯被放置）。

DrawerItem类的定义：

class DrawerItem {
  String title;
  IconData icon;

  DrawerItem(this.title, this.icon);
}

drawerItems定义如下：

final drawerItems = [
    new DrawerItem("Option1", Icons.list),
    new DrawerItem("Option2", Icons.event_note),
    new DrawerItem("Option3", Icons.account_balance),
   //... etc
  ];

Answer 1

我面临着一个嵌套的滚动视图同样的问题。我使用的是网格视图的身体和填充设置为0，摆脱了空间的

GridView.builder(
   padding: EdgeInsets.only(top: 0),

所以不管你的小部件从这种方法qazxsw诗返回添加填充它。

Answer 2

_getDrawerItemWidget(_selectedDrawerIndex)

更多信息：

Widget _getDrawerItemWidget(){
  return MediaQuery.removePadding(
    context: context,
    removeTop: true,
    child: ListView.builder(
     .......
    )
  );
}