Flutter跑马灯文本插件marquee_text的使用
Flutter跑马灯文本插件marquee_text的使用
截图
![截图](https://github.com/zhcode-fun/zhcode-fun/raw/master/marquee_text.gif)
使用
-
在你的
pubspec.yaml
文件中添加marquee_text
作为依赖项。dependencies: marquee_text: ^2.5.0+1
-
现在可以在你的Flutter项目中使用它了:
import 'package:flutter/material.dart'; import 'package:marquee_text/marquee_text.dart'; import 'package:marquee_text/vertical_marquee_text.dart'; void main() { runApp(const MyApp()); } class MyApp extends StatelessWidget { const MyApp({Key key}) : super(key: key); @override Widget build(BuildContext context) { return MaterialApp( title: 'Flutter Demo', theme: ThemeData( primarySwatch: Colors.blue, visualDensity: VisualDensity.adaptivePlatformDensity, ), home: const MyHomePage(), ); } } class MyHomePage extends StatefulWidget { const MyHomePage({Key key}) : super(key: key); @override _MyHomePageState createState() => _MyHomePageState(); } class _MyHomePageState extends State<MyHomePage> { final List<String> _textList = [ 'Short text.', 'Long text Long text Long text Long text Long text' ]; var firstTextIndex = 0; var secondTextIndex = 1; @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: const Text('MarqueeTextDemo'), centerTitle: true, ), body: Column( children: [ Row( children: [ /// 第一个文本 /// 固定宽度的Container Container( color: Colors.green, width: 160, child: MarqueeText( text: TextSpan( text: _textList[firstTextIndex], ), speed: 90, textDirection: TextDirection.rtl, marqueeDirection: MarqueeDirection.ltr, ), ), const SizedBox(width: 12), /// 第二个文本 /// 包含在Expanded中 Expanded( child: Container( color: Colors.pink, child: MarqueeText( text: TextSpan( text: _textList[secondTextIndex], ), style: const TextStyle( fontSize: 24, color: Colors.white, ), marqueeDirection: MarqueeDirection.ltr, ), ), ), ], ), Row( children: [ Expanded( child: MaterialButton( color: Colors.green, child: const Text( 'ChangeFirstText', style: TextStyle( color: Colors.white, ), ), onPressed: () { setState(() { firstTextIndex = 1 - firstTextIndex; }); }, ), ), const SizedBox(width: 12), Expanded( child: MaterialButton( color: Colors.pink, child: const Text( 'ChangeSecondText', style: TextStyle( color: Colors.white, ), ), onPressed: () { setState(() { secondTextIndex = 1 - secondTextIndex; }); }, ), ), ], ), Container( color: Colors.green, width: 160, height: 100, child: const VerticalMarqueeText( marqueeDirection: MarqueeDirection.btt, textAlign: TextAlign.center, text: TextSpan( children: [ TextSpan( text: '''Hello,Flutter!
Hello,Flutter! Hello,Flutter! Hello,Flutter! Hello,Flutter! Hello,Flutter! Hello,Flutter! Hello,Flutter! ‘’’, ), TextSpan( text: ‘’‘Hello,Flutter! Hello,Flutter! Hello,Flutter! Hello,Flutter! Hello,Flutter! Hello,Flutter! Hello,Flutter! Hello,Flutter!’’’, style: TextStyle( color: Colors.red, ), ), ], ), speed: 30, ), ), ], ), ); } }
更多关于Flutter跑马灯文本插件marquee_text的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
更多关于Flutter跑马灯文本插件marquee_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,以下是一个关于如何在Flutter中使用marquee_text
插件来实现跑马灯文本的示例代码。这个插件允许你在文本超出其容器宽度时,自动滚动显示文本。
首先,确保你已经在pubspec.yaml
文件中添加了marquee_text
依赖:
dependencies:
flutter:
sdk: flutter
marquee_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。
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:
import 'package:flutter/material.dart';
import 'package:marquee_text/marquee_text.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Marquee Text Example',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(),
);
}
}
class MyHomePage extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Marquee Text Example'),
),
body: Center(
child: Padding(
padding: const EdgeInsets.all(16.0),
child: MarqueeText(
text: '这是一个非常长的文本,用于演示Flutter中的MarqueeText插件效果。',
style: TextStyle(fontSize: 20, color: Colors.black),
blankSpace: 20.0,
speed: 50.0,
pauseAfterRound: Duration(seconds: 1),
startPadding: 10.0,
alignment: Alignment.centerLeft,
crossAxisAlignment: CrossAxisAlignment.center,
fadeout: MarqueeFadeout.clip,
repeating: true,
curve: Curves.easeInOutQuad,
),
),
),
);
}
}
在这个示例中:
MarqueeText
组件用于显示跑马灯文本。text
属性设置要显示的文本。style
属性用于设置文本的样式。blankSpace
属性设置文本在滚动前后的空白间距。speed
属性设置文本滚动的速度。pauseAfterRound
属性设置文本在一轮滚动结束后的暂停时间。startPadding
属性设置文本开始滚动前的初始填充。alignment
属性设置文本的对齐方式。crossAxisAlignment
属性设置文本在交叉轴上的对齐方式。fadeout
属性设置文本在滚动到边缘时的淡出效果。repeating
属性设置文本是否重复滚动。curve
属性设置文本滚动的动画曲线。
你可以根据实际需求调整这些属性,以达到最佳的显示效果。