Flutter自动滚动文本插件auto_scroll_text的使用

插件简介

AutoScrollText 是一个为需要单行文本小部件而设计的Flutter包，它可以在长文本的情况下避免文本重叠或使用TextOverflow.elipsis。该插件支持水平和垂直方向的文本自动滚动，并提供了弹性滚动模式。

安装

在你的 pubspec.yaml 文件中添加依赖：

dependencies:
  auto_scroll_text: ^0.0.6

然后运行 flutter pub get 来安装插件。

使用方法

基本用法

下面是一个简单的例子，展示了如何在应用中使用 AutoScrollText 小部件来创建一个水平滚动的文本。

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

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Auto Scroll Text Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Auto Scroll Text Demo'),
    );
  }
}

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

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            AutoScrollText(
              "这是一个非常长的文本示例，用于展示AutoScrollText插件的功能。这个文本将自动滚动，以确保所有内容都能被用户看到。",
              style: TextStyle(fontSize: 24),
            ),
          ],
        ),
      ),
    );
  }
}

高级用法

水平滚动

要创建一个水平滚动的文本，只需使用默认设置即可。

AutoScrollText(
  "水平滚动的文本",
  style: TextStyle(fontSize: 24),
)

垂直滚动

通过设置 scrollDirection 参数为 Axis.vertical，可以创建垂直滚动的文本。

AutoScrollText(
  "垂直滚动的文本",
  style: TextStyle(fontSize: 24),
  scrollDirection: Axis.vertical,
)

弹性滚动模式

通过设置 mode 参数为 AutoScrollTextMode.bouncing，可以使文本在到达边缘时反弹。

AutoScrollText(
  "具有弹性效果的滚动文本",
  style: TextStyle(fontSize: 24),
  mode: AutoScrollTextMode.bouncing,
)

示例代码

为了更全面地理解 AutoScrollText 的使用方式，以下是一个包含多种滚动模式的完整示例代码。

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

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

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Auto Scroll Text',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'Auto Scroll Text'),
    );
  }
}

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

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  void _openHorizontal() {
    Navigator.of(context).push(MaterialPageRoute(
      builder: (context) => const HorizontalExample(),
    ));
  }

  void _openVertical() {
    Navigator.of(context).push(MaterialPageRoute(
      builder: (context) => const VerticalExample(),
    ));
  }

  void _openBouncingHorizontal() {
    Navigator.of(context).push(MaterialPageRoute(
      builder: (context) => const BouncingHorizontalExample(),
    ));
  }

  void _openBouncingVertical() {
    Navigator.of(context).push(MaterialPageRoute(
      builder: (context) => const BouncingVerticalExample(),
    ));
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Padding(
        padding: const EdgeInsets.symmetric(horizontal: 16.0),
        child: Column(
          mainAxisAlignment: MainAxisAlignment.spaceAround,
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            ElevatedButton(
                onPressed: _openHorizontal,
                child: const Text("Open HORIZONTAL example")),
            ElevatedButton(
                onPressed: _openVertical,
                child: const Text("Open VERTICAL example")),
            ElevatedButton(
                onPressed: _openBouncingHorizontal,
                child: const Text("Open BOUNCING HORIZONTAL example")),
            ElevatedButton(
                onPressed: _openBouncingVertical,
                child: const Text("Open BOUNCING VERTICAL example")),
          ],
        ),
      ),
    );
  }
}

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text("Horizontal Example"),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: const [
            AutoScrollText(
              "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.",
              style: TextStyle(fontSize: 24),
            ),
          ],
        ),
      ),
    );
  }
}

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text("Vertical Example"),
      ),
      body: Center(
        child: Row(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: const [
            AutoScrollText(
              "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.",
              style: TextStyle(fontSize: 24),
              scrollDirection: Axis.vertical,
            ),
          ],
        ),
      ),
    );
  }
}

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text("Bouncing Horizontal Example"),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: const [
            AutoScrollText(
              "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.",
              style: TextStyle(fontSize: 24),
              mode: AutoScrollTextMode.bouncing,
            ),
          ],
        ),
      ),
    );
  }
}

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text("Bouncing Vertical Example"),
      ),
      body: Center(
        child: Row(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: const [
            AutoScrollText(
              "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.",
              style: TextStyle(fontSize: 24),
              scrollDirection: Axis.vertical,
              mode: AutoScrollTextMode.bouncing,
            ),
          ],
        ),
      ),
    );
  }
}

以上代码展示了如何在不同的场景下使用 AutoScrollText 插件，包括水平滚动、垂直滚动以及带有弹性的滚动模式。你可以根据自己的需求选择合适的配置来实现所需的效果。

更多关于Flutter自动滚动文本插件auto_scroll_text的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html

bupafengyu 1楼•2 天前

更多关于Flutter自动滚动文本插件auto_scroll_text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，以下是如何在Flutter中使用auto_scroll_text插件的一个示例代码案例。这个插件允许你创建自动滚动的文本视图。

首先，你需要在你的pubspec.yaml文件中添加auto_scroll_text依赖项：

dependencies:
  flutter:
    sdk: flutter
  auto_scroll_text: ^x.y.z  # 请替换为最新版本号

然后，运行flutter pub get来安装依赖项。

接下来，你可以在你的Flutter应用中使用这个插件。以下是一个完整的示例代码，展示了如何使用AutoScrollText组件：

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

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Auto Scroll Text Example',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> with SingleTickerProviderStateMixin {
  late AnimationController _controller;

  @override
  void initState() {
    super.initState();
    _controller = AnimationController(
      duration: const Duration(seconds: 5),  // 滚动一次所需的时间
      vsync: this,
    )..repeat(reverse: true);  // 无限循环，并反向滚动
  }

  @override
  void dispose() {
    _controller.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Auto Scroll Text Example'),
      ),
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: <Widget>[
            Text('This is a static text above the auto-scrolling text.'),
            SizedBox(height: 16.0),
            AutoScrollText(
              text: 'This is an auto-scrolling text. It will scroll horizontally indefinitely.',
              style: TextStyle(fontSize: 20, color: Colors.black),
              scrollSpeed: _controller,  // 使用AnimationController来控制滚动速度
              scrollAlignment: ScrollAlignment.start,  // 从开始位置滚动
            ),
            SizedBox(height: 16.0),
            Text('This is a static text below the auto-scrolling text.'),
          ],
        ),
      ),
    );
  }
}

在这个示例中，我们创建了一个简单的Flutter应用，其中包含一个自动滚动的文本视图。我们使用了AnimationController来控制滚动速度，并设置了repeat(reverse: true)来实现无限循环和反向滚动。

AutoScrollText组件的text属性用于设置要滚动的文本。
scrollSpeed属性接受一个Animation<double>对象，用于控制滚动速度。
scrollAlignment属性定义了滚动文本的起始位置。

你可以根据需要调整这些属性，以符合你的应用需求。