flutter - 无法在标准 ListView 小部件上滚动；总是过度渲染 150px

Question

ListView 根本不会滚动。错误说问题出在 main.dart 文件中，而不是在我正在处理的模块中，但这是溢出的模块。

尝试了多种方法:

主要:假，
物理:常量 AlwaysScrollableScrollPhysics()，
Controller :_ Controller

关于制作 ListView 的 Flutter 开发文档

关于制作 ListView 的中等帖子

无数堆栈溢出Qs

这是我的代码:

import 'package:flutter/material.dart';

class Listicle extends StatefulWidget {
  @override
  ListicleState createState() => ListicleState();
}

class ListicleState extends State<Listicle> {
  final List<String> entries = <String>['A', 'B', 'C', 'D', 'E', 'F'];
  final List<int> colorCodes = <int>[600, 500, 100, 600, 500, 100];

  ScrollController _controller = new ScrollController();

  @override
  Widget build(BuildContext context) {
    return Container(
      child: ListView.builder(
        primary: false,
        physics: const AlwaysScrollableScrollPhysics(),
        controller: _controller,
        shrinkWrap: true,
        padding: const EdgeInsets.all(8),
        itemCount: entries.length,
        itemBuilder: (BuildContext context, int index) {
          return Container(
            height: 100,
            color: Colors.amber[colorCodes[index]],
            child: Center(child: Text('Entry ${entries[index]}')),
          );
        }
      )
    );
  }
}

这是错误:

════════ Exception caught by rendering library ═════════════════════════════════════════════════════
The following assertion was thrown during layout:
A RenderFlex overflowed by 150 pixels on the bottom.

The relevant error-causing widget was: 
  Column file:///Users/christopher/AndroidStudioProjects/test_app/lib/main.dart:76:13
The overflowing RenderFlex has an orientation of Axis.vertical.
The edge of the RenderFlex that is overflowing has been marked in the rendering with a yellow and black striped pattern. This is usually caused by the contents being too big for the RenderFlex.

Consider applying a flex factor (e.g. using an Expanded widget) to force the children of the RenderFlex to fit within the available space instead of being sized to their natural size.
This is considered an error condition because it indicates that there is content that cannot be seen. If the content is legitimately bigger than the available space, consider clipping it with a ClipRect widget before putting it in the flex, or using a scrollable container rather than a Flex, like a ListView.

The specific RenderFlex in question is: RenderFlex#c9341 relayoutBoundary=up1 OVERFLOWING
...  needs compositing
...  parentData: offset=Offset(0.0, 80.0); id=_ScaffoldSlot.body (can use size)
...  constraints: BoxConstraints(0.0<=w<=392.7, 0.0<=h<=679.3)
...  size: Size(392.7, 679.3)
...  direction: vertical
...  mainAxisAlignment: start
...  mainAxisSize: max
...  crossAxisAlignment: center
...  verticalDirection: down
◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤
════════════════════════════════════════════════════════════════════════════════════════════════════

我是 非常 Flutter/dart 的新手(从字面上看是昨天开始的)，这已经让我难倒了。

这是快照: /image/qlDMZ.png

Answer 1

这有效:

import 'package:flutter/material.dart';

final Color darkBlue = Color.fromARGB(255, 18, 32, 47);

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData.dark().copyWith(scaffoldBackgroundColor: darkBlue),
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        body: Center(
          child: Listicle(),
        ),
      ),
    );
  }
}

class Listicle extends StatefulWidget {
  @override
  ListicleState createState() => ListicleState();
}

class ListicleState extends State<Listicle> {
  final List<String> entries = <String>['A', 'B', 'C', 'D', 'E', 'F','G','H'];
  final List<int> colorCodes = <int>[600, 500, 100, 600, 500, 100,100,100];

 @override
  Widget build(BuildContext context) {
    return Container(
      child: ListView.builder(
        primary: false,
        shrinkWrap: true,
        padding: const EdgeInsets.all(8),
        itemCount: entries.length,
        itemBuilder: (BuildContext context, int index) {
          return Container(
            height: 100,
            color: Colors.amber[colorCodes[index]],
            child: Center(child: Text('Entry ${entries[index]}')),
          );
        }
      )
    );
  }
}