flutter - 如何在单页中显示 GridView 和其他 View #flutter

Question

如何在同一个页面中添加 GridView 和其他 View ？
我尝试使用 ListView ，但它显示错误

I/flutter (10293): Another exception was thrown: 'package:flutter/src/rendering/sliver_multi_box_adaptor.dart': Failed assertion: line 461 pos 12: 'child.hasSize': is not true. I/flutter (10293): Another exception was thrown: NoSuchMethodError: The getter 'scrollOffsetCorrection' was called on null. I/flutter (10293): Another exception was thrown: NoSuchMethodError: The method 'debugAssertIsValid' was called on null. I/flutter (10293): Another exception was thrown: NoSuchMethodError: The getter 'visible' was called on null

  body:ListView(
      children: <Widget>[
        Text("checking"),
        Container(
        child: GridView.count(
          crossAxisCount: 3,
          childAspectRatio: .6,
          children: _list.map((p) => ProductManagment(p)).toList(),
        ),
      ) 
      ],
    )

又一次尝试

  body:ListView(
      children: <Widget>[
        Text("checking"),
         GridView.count(
          crossAxisCount: 3,
          childAspectRatio: .6,
          children: _list.map((p) => ProductManagment(p)).toList(),
        ) 
      ],
    )

再次出错

I/flutter (10293): Another exception was thrown: RenderBox was not laid out: RenderCustomPaint#f955c relayoutBoundary=up6 NEEDS-PAINT I/flutter (10293): Another exception was thrown: RenderBox was not laid out: RenderRepaintBoundary#a9147 relayoutBoundary=up5 NEEDS-PAINT I/flutter (10293): Another exception was thrown: RenderBox was not laid out: RenderRepaintBoundary#4a4c9 relayoutBoundary=up4 NEEDS-PAINT I/flutter (10293): Another exception was thrown: 'package:flutter/src/rendering/sliver_multi_box_adaptor.dart': Failed assertion: line 461 pos 12: 'child.hasSize': is not true. I/flutter (10293): Another exception was thrown: NoSuchMethodError: The getter 'scrollOffsetCorrection' was called on null. I/flutter (10293): Another exception was thrown: NoSuchMethodError: The method 'debugAssertIsValid' was called on null. I/flutter (10293): Another exception was thrown: NoSuchMethodError: The getter 'visible' was called on null.

Answer 1

我认为您应该设置 Container 的高度或通过 Expanded 小部件扭曲它。并告诉会发生什么？可能是尺寸缺失，这就是错误发生的方式。

已编辑:

 body:ListView(
      children: <Widget>[
        Text("checking"),
        Container(
        height: 300.0
        child: GridView.count(
          crossAxisCount: 3,
          childAspectRatio: .6,
          children: _list.map((p) => ProductManagment(p)).toList(),
        ),
      ) 
      ],
    )

在容器中设置高度:300.0。 (您可以根据需要设置高度/宽度或尝试使用Expanded 小部件)