颤振中的自定义高度网格视图答案

【问题标题】：custom height gridview in flutter颤振中的自定义高度网格视图
【发布时间】：2020-07-01 22:24:30
【问题描述】：

我做我的颤振应用程序。如何在颤动中使用自定义高度和重量进行网格视图？网格视图中的项目应该是矩形而不是正方形。

【问题讨论】：

添加您尝试过的示例代码以便我们为您提供帮助，也许是dartpad example

标签： listview flutter gridview flutter-layout

【解决方案1】：

您将不得不使用 childAspectRatio。我已经通过下面的示例说明了横向和纵向模式。如果你想要一个方形网格，那么考虑使用 childAspectRatio 作为 1。

class HomePage extends StatefulWidget {
  @override
  _HomePageState createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  List<String> cities = ['Kathmandu', 'Baglung', 'Pokhara'];
  var width = 100;
  var height = 200;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(),
        body: Container(
          color: Colors.blueAccent,
          child: GridView.builder(
              itemCount: cities.length,
              gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
                  crossAxisCount: MediaQuery.of(context).orientation ==
                          Orientation.landscape ? 3: 2,
                  crossAxisSpacing: 8,
                  mainAxisSpacing: 8,
                  childAspectRatio: width / height),
              itemBuilder: (context, position) {
                return Container(
                  alignment: Alignment.center,
                  color: Colors.black,
                  child: Text(
                    cities[position],
                    style: TextStyle(color: Colors.white),
                  ),
                );
              }),
        ));
  }
}

【讨论】：

【解决方案2】：

使用flutter_staggered_grid_view插件。

代码：



class MyHomeScreen extends StatefulWidget {
   @override
   _MyHomeScreenState createState() => _MyHomeScreenState();
  }

class _MyHomeScreenState extends State<MyHomeScreen> {

List<ItemDetailsModel> itemDetails = [
    ItemDetailsModel(
      name: "Hello 1",
      color: Colors.teal
    ),
    ItemDetailsModel(
      name: "Hello  2",
      color: Colors.teal[100]
    ),
    ItemDetailsModel(
      name: "Hello 3",
      color: Colors.teal[200]
    ),
    ItemDetailsModel(
      name: "Hello 4",
      color: Colors.teal[300]
    ),
    ItemDetailsModel(
      name: "Hello 5",
      color: Colors.teal
    ),
    ItemDetailsModel(
      name: "Hello 6",
      color: Colors.tealAccent
    ),
    ItemDetailsModel(
      name: "Hello 7",
      color: Colors.tealAccent[200]
    ),
    ItemDetailsModel(
      name: "Hello 8",
      color: Colors.tealAccent[300]
    ),
    ItemDetailsModel(
      name: "Hello 9",
      color: Colors.green
    ),


  ];


  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text("Staggered Grid View"),),
      body: Center(
        child: sliverGridWidget(context),
      ),
    );
  }

  Widget sliverGridWidget(BuildContext context){
    return StaggeredGridView.countBuilder(
        padding: const EdgeInsets.all(8.0),
        crossAxisCount: 4,
        itemCount: itemDetails.length,
        itemBuilder: (context, index){
          return Container(
            color:itemDetails[index].color,
             child:Text(itemDetails[index].name)
          );
        },
         staggeredTileBuilder: (index) => StaggeredTile.count(2,3), //Make size as you want.
         mainAxisSpacing: 8.0,
         crossAxisSpacing:8.0,
      );
  }
}

模型类：

class ItemDetailsModel{
  String name;
  Color color;
  ItemDetailsModel({this.name, this.color});
}

输出：

【讨论】：