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

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,
                  ])

Column(
  children: <Widget>[
    FirstWidget(),
    Spacer(),
    SecondWidget(),
  ]
)

Spacer创建一个可插入到[flexible]小部件的灵活空间。(像一列)

你可以用不同的方法来解决这个问题。

如果使用行/列，则必须使用mainAxisAlignment: MainAxisAlignment.spaceEvenly 如果你使用Wrap Widget，你必须使用runSpacing: 5, spacing: 10日, 在任何地方都可以使用SizeBox()

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