Flutter列布局插件column_layout的使用

Flutter列布局插件column_layout的使用

非常简单的小组件,用于创建适用于移动设备、Web和桌面应用的布局。

示例

import 'package:flutter/material.dart';
import 'package:column_layout/column_layout.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  // 这个小组件是你的应用程序的根。
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Coloumn Layout 示例',
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: const MyHomePage(title: 'Column Layout'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

  [@override](/user/override)
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  [@override](/user/override)
  Widget build(BuildContext context) {
    final List<Alignment> alignments = [
      Alignment.topCenter,
      Alignment.topRight,
      Alignment.topLeft,
      Alignment.bottomCenter,
      Alignment.bottomLeft,
      Alignment.bottomRight,
      Alignment.center,
      Alignment.centerLeft,
      Alignment.centerRight,
    ];
    return Material(
      child: Container(
        alignment: Alignment.center,
        padding: const EdgeInsets.all(10),
        child: ColumnLayout(
          columns: 8,
          rows: const [1, 2, 3, 3, 4, 4, 5, 6],
          columnFlex: const [3, 2, 1, 1, 1, 1, 1, 1],
          rowFlex: const {
            0: [1],
            1: [80, 20],
            2: [1, 1, 1],
            3: [1, 1, 1],
            4: [1, 1, 1, 1],
            5: [1, 1, 1, 1],
            6: [1, 1, 1, 1, 1],
            7: [1, 1, 2, 1, 1, 2],
          },
          getColumnWidgetAt: (int col, int row) {
            return Text(
                style: TextStyle(color: Colors.black, fontSize: 15),
                'C${col + 1}R${row + 1}');
          },
          getColumnAlignmentAt: (col, row) {
            return alignments[col];
          },
          decoration: BoxDecoration(border: Border.all(color: Colors.red)),
          padding: const EdgeInsets.all(10.0),
        ),
      ),
    );
  }
}

更多关于Flutter列布局插件column_layout的使用的实战教程也可以访问 https://www.itying.com/category-92-b0.html

1 回复

更多关于Flutter列布局插件column_layout的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html


当然,以下是一个关于如何使用 column_layout 插件在 Flutter 中创建列布局的示例代码。请注意,column_layout 并不是一个官方 Flutter 插件,但假设它是一个自定义的或第三方插件,其作用是简化列布局的管理。在这个示例中,我将展示如何使用 Flutter 自带的 Column 小部件来实现类似的布局,因为通常情况下,Column 已经足够强大来处理列布局。

如果你有一个特定的 column_layout 插件,并且它的 API 与 Column 类似,你可以参考下面的代码,并将 Column 替换为 ColumnLayout(假设这是插件提供的类名)。

使用 Flutter 自带的 Column 小部件

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Column Layout Example',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: Scaffold(
        appBar: AppBar(
          title: Text('Column Layout Example'),
        ),
        body: ColumnLayoutExample(),
      ),
    );
  }
}

class ColumnLayoutExample extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.all(16.0),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start, // 子项在交叉轴上的对齐方式
        children: <Widget>[
          Text(
            'Title',
            style: TextStyle(fontSize: 24, fontWeight: FontWeight.bold),
          ),
          SizedBox(height: 16), // 间距
          Text(
            'This is a paragraph of text that demonstrates how to use the Column widget in Flutter.',
            style: TextStyle(fontSize: 16),
          ),
          SizedBox(height: 16), // 间距
          Row( // 可以在 Column 中嵌套 Row
            children: <Widget>[
              Icon(Icons.star, color: Colors.amber),
              Text(' Rated 4.2 out of 5'),
            ],
          ),
          SizedBox(height: 16), // 间距
          ElevatedButton(
            onPressed: () {},
            child: Text('Click Me'),
          ),
        ],
      ),
    );
  }
}

假设 column_layout 插件存在

如果 column_layout 插件存在,并且它的用法类似于 Column,你可能只需要将上述代码中的 Column 替换为 ColumnLayout。以下是一个假设性的示例:

import 'package:flutter/material.dart';
import 'package:column_layout/column_layout.dart'; // 假设这是插件的导入路径

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Column Layout Example with Plugin',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: Scaffold(
        appBar: AppBar(
          title: Text('Column Layout Example with Plugin'),
        ),
        body: ColumnLayoutExample(),
      ),
    );
  }
}

class ColumnLayoutExample extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.all(16.0),
      child: ColumnLayout( // 使用插件提供的 ColumnLayout
        crossAxisAlignment: CrossAxisAlignment.start, // 假设插件支持此属性
        children: <Widget>[
          Text(
            'Title',
            style: TextStyle(fontSize: 24, fontWeight: FontWeight.bold),
          ),
          SizedBox(height: 16),
          Text(
            'This is a paragraph of text that demonstrates how to use the ColumnLayout plugin in Flutter.',
            style: TextStyle(fontSize: 16),
          ),
          SizedBox(height: 16),
          Row(
            children: <Widget>[
              Icon(Icons.star, color: Colors.amber),
              Text(' Rated 4.2 out of 5'),
            ],
          ),
          SizedBox(height: 16),
          ElevatedButton(
            onPressed: () {},
            child: Text('Click Me'),
          ),
        ],
      ),
    );
  }
}

请注意,由于 column_layout 插件不是官方的,上述代码中的 ColumnLayout 类及其属性(如 crossAxisAlignment)是假设性的。如果你有一个具体的 column_layout 插件,请查阅其文档以获取正确的用法和属性。

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