在这种情况下，大小框将不起作用，手机处于横向模式。

body: Column(
      mainAxisAlignment: MainAxisAlignment.spaceBetween,
      crossAxisAlignment: CrossAxisAlignment.stretch,
      children: <Widget>[
        Expanded(
           child: Container(
            margin: EdgeInsets.all(15.0),
            decoration: BoxDecoration(
              color: Color(0xFF1D1E33),
              borderRadius: BorderRadius.circular(10.0),
            ),
          ),
        ),
        Expanded(
           child: Container(
            margin: EdgeInsets.all(15.0),
            decoration: BoxDecoration(
              color: Color(0xFF1D1E33),
              borderRadius: BorderRadius.circular(10.0),
            ),
          ),
        ),
        Expanded(
           child: Container(
            margin: EdgeInsets.all(15.0),
            decoration: BoxDecoration(
              color: Color(0xFF1D1E33),
              borderRadius: BorderRadius.circular(10.0),
            ),
          ),
        ),
      ],
     )

这是另一个涉及for循环的选项。

Column(
  children: <Widget>[
    for (var i = 0; i < widgets.length; i++)
      Column(
        children: [
          widgets[i], // The widget you want to create or place goes here.
          SizedBox(height: 10) // Any kind of padding or other widgets you want to put.
        ])
  ],
),

Column(children: <Widget>[
   Container(margin: EdgeInsets.only(top:12, child: yourWidget)),
   Container(margin: EdgeInsets.only(top:12, child: yourWidget))
]);

我也希望在Flutter中有一些内置的方法来做到这一点。就像一个参数，你可以传递给列或行。有时你不希望每个元素都有填充，但希望元素之间有空格。特别是如果你有两个以上的孩子，写这样的东西有点乏味

const double gap = 10;
return Column(
  children: [
    Text('Child 1'),
    SizedBox(height: gap),
    Text('Child 2'),
    SizedBox(height: gap),
    Text('Child 3'),
    SizedBox(height: gap),
    Text('Child 4'),
  ],
);

然而，我想出了一个快速(不完美)的解决方案:

在你的项目中添加这个(只有一次):

extension ListSpaceBetweenExtension on List<Widget> {
  List<Widget> withSpaceBetween({double? width, double? height}) => [
    for (int i = 0; i < this.length; i++)
      ...[
        if (i > 0)
          SizedBox(width: width, height: height),
        this[i],
      ],
  ];
}

从现在开始，只要你有行或列，你就可以写

Column(
  children: [
    Text('Child 1'),
    Text('Child 2'),
    Text('Child 3'),
    Text('Child 4'),
  ].withSpaceBetween(height: 10),
),

当使用Row时，你必须用width替换height。

您可能必须在列的子列之间使用sizebox()小部件。 希望这对你们有用

你可以试试这个:

import 'package:flutter/material.dart';

class CustomColumn extends Column {
  CustomColumn({
    Key? key,
    MainAxisAlignment mainAxisAlignment = MainAxisAlignment.start,
    MainAxisSize mainAxisSize = MainAxisSize.max,
    CrossAxisAlignment crossAxisAlignment = CrossAxisAlignment.center,
    TextDirection? textDirection,
    VerticalDirection verticalDirection = VerticalDirection.down,
    TextBaseline? textBaseline,
    List children = const [],
    EdgeInsetsGeometry? rowPadding,
  }) : super(
          children: children.map((e) => Padding(padding : rowPadding ?? EdgeInsets.only(bottom:12), child : e)).toList(),
          key: key,
          mainAxisAlignment: mainAxisAlignment,
          mainAxisSize: mainAxisSize,
          crossAxisAlignment: crossAxisAlignment,
          textDirection: textDirection,
          verticalDirection: verticalDirection,
          textBaseline: textBaseline,
        );
}

并调用

CustomColumn(children: [
                    item1,
                    item2,
                    item3,
                  ])