默认情况下没有高度， 您可以将列包装到容器中，并将特定高度添加到容器中。 然后你可以像下面这样使用:

Container(
   width: double.infinity,//Your desire Width
   height: height,//Your desire Height
   child: Column(
      mainAxisAlignment: MainAxisAlignment.spaceBetween,
      children: <Widget>[
         Text('One'),
         Text('Two')
      ],
   ),
),

还可以使用辅助函数在每个子元素之后添加空格。

List<Widget> childrenWithSpacing({
  @required List<Widget> children,
  double spacing = 8,
}) {
  final space = Container(width: spacing, height: spacing);
  return children.expand((widget) => [widget, space]).toList();
}

因此，返回的列表可以用作列的子元素

Column(
  children: childrenWithSpacing(
    spacing: 14,
    children: [
      Text('This becomes a text with an adjacent spacing'),
      if (true == true) Text('Also, makes it easy to add conditional widgets'),
    ],
  ),
);

我不确定，如果它是错误的或有一个性能惩罚运行的孩子通过一个帮助函数为相同的目标?

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,
                  ])

有很多方法可以做到这一点，我在这里列出了一些。

Use SizedBox and provide some height: Column( children: <Widget>[ Widget1(), SizedBox(height: 10), // <-- Set height Widget2(), ], ) Use Spacer Column( children: <Widget>[ Widget1(), Spacer(), // <-- Spacer Widget2(), ], ) Use Expanded Column( children: <Widget>[ Widget1(), Expanded(child: SizedBox.shrink()), // <-- Expanded Widget2(), ], ) Set mainAxisAlignment Column( mainAxisAlignment: MainAxisAlignment.spaceAround, // <-- alignments children: <Widget>[ Widget1(), Widget2(), ], ) Use Wrap Wrap( direction: Axis.vertical, spacing: 20, // <-- Spacing between children children: <Widget>[ Widget1(), Widget2(), ], )

你可以在这两个小部件之间使用Padding小部件，或者用Padding小部件包装这些小部件。

更新

SizedBox小部件可以在两个小部件之间使用，以增加两个小部件之间的空间，它使代码比填充小部件更具可读性。

Ex:

Column(
  children: <Widget>[
    Widget1(),
    SizedBox(height: 10),
    Widget2(),
  ],
),

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