Flutter 在行中对齐单个 child

Question

我有一个包含行数组的列，每行内部都有一些容器。这是我的代码：

import 'package:flutter/material.dart';

Widget row() {
  return Row(
    crossAxisAlignment: CrossAxisAlignment.start,
    children: [
      Container(
        color: Colors.amber,
        width: 50,
        height: 100,
      ),
      Container(
        color: Colors.amber,
        width: 50,
        height: 150,
      ),
      Container(
        color: Colors.blue,
        width: 50,
        height: 80,
      ),
    ],
  );
}

class TestPage extends StatelessWidget {
  const TestPage({Key? key}) : super(key: key);
  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        row(),
        Divider(),
        row(),
        Divider(),
        row(),
      ],
    );
  }
}

输出：

我想将蓝色容器与底部对齐，而不触及其他容器位置。我怎样才能做到这一点？这是我的预期结果：

Answer 1

请试试这个

import 'package:flutter/material.dart';

Widget row() {
  return Row(
    crossAxisAlignment: CrossAxisAlignment.end,
    children: [
      Row(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Container(
            color: Colors.amber,
            width: 50,
            height: 100,
          ),
          Container(
            color: Colors.amber,
            width: 50,
            height: 150,
          ),
        ],
      ),
      Container(
        color: Colors.blue,
        width: 50,
        height: 80,
      ),
    ],
  );
}

class TestPage extends StatelessWidget {
  const TestPage({Key key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        row(),
        Divider(),
        row(),
        Divider(),
        row(),
      ],
    );
  }
}

Answer 2

使用 CrossAxisAlignment end 获取主行并将 Amber 包裹在另一行中并使用 CrossAxisAlignment start.

进行声明

这是如何工作的？

因为你的蓝色容器现在将在主行内并且现在用 CrossAxisAlignment.end 声明，因此它将与父对齐。

Widget row() {
  return Row(
    crossAxisAlignment: CrossAxisAlignment.end,
    children: [
      Row(crossAxisAlignment: CrossAxisAlignment.start, children: [
        Container(
          color: Colors.amber,
          width: 50,
          height: 100,
        ),
        Container(
          color: Colors.amber,
          width: 50,
          height: 150,
        )
      ]),
      Container(
        alignment: Alignment.bottomCenter,
        color: Colors.blue,
        width: 50,
        height: 80,
      ),
    ],
  );
}

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