我收到此错误 A renderFlex 在底部溢出 100 像素

Posted 2023-02-23

【中文标题】我收到此错误 A renderFlex 在底部溢出 100 像素

【英文标题】：I got this error A renderFlex overFlowed by 100 pixels on the bottom

【发布时间】：2020-08-18 08:21:57

【问题描述】：

如下所示，我尝试添加一个 TextFormFiled，添加后出现错误 A renderFlex overFlowed ：

 Widget build(BuildContext context) 
    return Column(
      children: <Widget>[
        Text('Rate the order !', style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold),),
        SizedBox(height: 10,),
        Row(
          mainAxisAlignment: MainAxisAlignment.center,
          children: List.generate(starCount, (index)=>buildStar(context, index)),
        ),
        Padding(
          padding: EdgeInsets.all(10),
          child: Form(child:TextFormField(
            decoration: (InputDecoration(
              labelText: 'add your notes'
            )),
            textInputAction: TextInputAction.done,
          )),
        )
      ],
    );

【参考方案1】：

将列包装在 SingleChildScrollView 中。

DartPad 上的工作示例： https://dartpad.dev/b6409e10de32b280b8938aa75364fa7b

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget 
  @override
  Widget build(BuildContext context) 
    return MaterialApp(
      title: 'Flutter Demo',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  


class MyHomePage extends StatefulWidget 
  MyHomePage(Key key, this.title) : super(key: key);

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();


class _MyHomePageState extends State<MyHomePage> 

  Widget build(BuildContext context) 
    return Material(child: 
                    SingleChildScrollView(child:
                    Column(
      children: <Widget>[
        Text('Rate the order !', style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold),),
        SizedBox(height: 10,),
        Row(
          mainAxisAlignment: MainAxisAlignment.center,
          children: List.generate(10, (index)=>Icon(Icons.star)),
        ),
        SizedBox(height: 10,),
        Column(
          mainAxisAlignment: MainAxisAlignment.center,
          // add many children just to overflow on the bottom 
          children: List.generate(100, (index)=>Icon(Icons.video_call)),
        ),
        Padding(
          padding: EdgeInsets.all(10),
          child: Form(child:TextFormField(
            decoration: (InputDecoration(
              labelText: 'add your notes'
            )),
            textInputAction: TextInputAction.done,
          )),
        )
      ],
    ),),);
  

【参考方案2】：

给列或行内的列表一个固定的高度。使用 Container 或任何其他小部件

【参考方案3】：

效果很好，看看吧。见以下代码：

import 'package:flutter/material.dart';

Widget build(BuildContext context) 
    return Column(
      children: <Widget>[
        Text('Rate the order !', style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold),),
        SizedBox(height: 10,),
        Expanded(
                  child: Row(
            mainAxisAlignment: MainAxisAlignment.center,
            children: List.generate(starCount, (index)=>buildStar(context, index)),
          ),
        ),
        Padding(
          padding: EdgeInsets.all(10),
          child: Form(child:TextFormField(
            decoration: (InputDecoration(
              labelText: 'add your notes'
            )),
            textInputAction: TextInputAction.done,
          )),
        )
      ],
    );

希望对你有帮助。

【参考方案4】：

把Column作为SingleChildScrollView的child

【讨论】：

我做到了，它没有显示错误，但视图本身消失了

您是否设置了列mainAxisSize: MainAxisSize.min？