我是flutter新手，没有太多经验。
我正在尝试使用 flutter 开发一个 android 应用程序，这是我以前的应用程序设计。
我还能够成功地在颤动中制作网格视图，但列高是问题所在。他们中的任何人都可以帮助我解决我的颤振代码吗？
class MyHomePage extends StatelessWidget {
@override
Widget build(BuildContext context) {
hi(){
}
return new Scaffold(
appBar: new AppBar(
actions: <Widget>[],
title: new Text("milla"),
),
body: new Container(
child: new Center(
child: new GridView.count(
shrinkWrap: true,
scrollDirection: Axis.vertical,
childAspectRatio:1.0,
crossAxisCount: MediaQuery.of(context).size.width <= 400.0 ? 3 : MediaQuery.of(context).size.width >= 1000.0 ? 5 : 4,
// Create a grid with 2 columns. If you change the scrollDirection to
// horizontal, this would produce 2 rows.
crossAxisSpacing: 2.0,
// Generate 100 Widgets that display their index in the List
children: new List.generate(100, (index) {
return new Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
mainAxisSize: MainAxisSize.min,
verticalDirection: VerticalDirection.down,
children: <Widget>[
new Center(
child: new Image(
image: new NetworkImage('https://github.com/flutter/website/blob/master/_includes/code/layout/lakes/images/lake.jpg?raw=true')
)
),
new Expanded(child: new Text("apple2")), new Expanded(child: new Text(
'Item $index',
style: Theme.of(context).textTheme.headline,
)),new Expanded(child: new Center(child: new Row(
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[new Text("+",style: new TextStyle(fontSize: 24.0),),new Text("1"),new Text("-")])))]
);
}),
),
),
)
);
}
}
And this is my output.
如何设置柱高？
当我尝试添加新视图时，它显示此错误
“抛出了另一个异常：RenderFlex 底部溢出了 21 个像素。”
把这个代替
childAspectRatio:1.0 to childAspectRatio: (itemWidth / itemHeight)
var size = MediaQuery.of(context).size;
final double itemHeight = (size.height) / 2;
final double itemWidth = size.width / 2;
在我的代码中设置 Gridview 的高度和宽度效果很好