Flutter富文本编辑插件flutter_richtext_composer的使用
Flutter富文本编辑插件flutter_richtext_composer的使用
flutter_richtext_composer
是一个用于在Flutter应用中方便地创建国际化友好的富文本(RichText)的插件。
开始使用
首先,需要在您的项目中导入该库:
import 'package:flutter_richtext_composer/flutter_richtext_composer.dart';
示例代码
接下来,您可以像下面这样开始构建 RichText
:
示例1:基本用法
RichTextComposer(
'Hi {name}, I am {my_name}! {icon}',
style: TextStyle(fontSize: 30),
placeholders: {
'name': TextSpan(
text: 'Son',
style: TextStyle(fontWeight: FontWeight.bold),
),
'my_name': TextSpan(
text: 'Dad',
style: TextStyle(
color: Colors.red,
decoration: TextDecoration.underline,
),
),
'icon': WidgetSpan(
child: GestureDetector(
child: Icon(Icons.person),
onTap: () {
ScaffoldMessenger.of(context).showSnackBar(SnackBar(
content: Text('Icon has been clicked'),
));
},
),
),
},
)
示例2:转义占位符
如果您想转义占位符,请在占位符前加上反斜杠 \
。例如:
RichTextComposer(
'Hi \\{dad}, I am {batman}!',
style: TextStyle(fontSize: 25),
placeholders: {
'batman': TextSpan(
text: 'Batman',
style: TextStyle(
color: Colors.red,
decoration: TextDecoration.underline,
),
),
},
)
完整示例Demo
以下是一个完整的示例Demo,展示了如何在Flutter应用中使用 flutter_richtext_composer
插件:
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_markdown/flutter_markdown.dart';
import 'package:flutter_richtext_composer/flutter_richtext_composer.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: Demo(),
);
}
}
class Demo extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Flutter RichText Composer'),
),
body: Container(
padding: EdgeInsets.all(20),
child: ListView(
children: [
RichTextComposer(
'Hi {name}, I am {my_name}! {icon}',
style: TextStyle(fontSize: 30),
placeholders: {
'name': TextSpan(
text: 'Son',
style: TextStyle(fontWeight: FontWeight.bold),
),
'my_name': TextSpan(
text: 'Dad',
style: TextStyle(
color: Colors.red,
decoration: TextDecoration.underline,
),
),
'icon': WidgetSpan(
child: GestureDetector(
child: Icon(Icons.person),
onTap: () {
ScaffoldMessenger.of(context).showSnackBar(SnackBar(
content: Text('Icon has been clicked'),
));
},
),
),
},
),
SizedBox(height: 420, child: Markdown(data: '''
```dart
RichTextComposer(
'Hi {name}, I am {my_name}! {icon}',
style: TextStyle(fontSize: 30),
placeholders: {
'name': TextSpan(
text: 'Son',
style: TextStyle(fontWeight: FontWeight.bold),
),
'my_name': TextSpan(
text: 'Dad',
style: TextStyle(
color: Colors.red,
decoration: TextDecoration.underline,
),
),
'icon': WidgetSpan(
child: GestureDetector(
child: Icon(Icons.person),
onTap: () {
ScaffoldMessenger.of(context).showSnackBar(SnackBar(
content: Text('Icon has been clicked'),
));
},
),
),
},
),
‘’’)), RichTextComposer( ‘Hi \{dad}, I am {batman}!’, style: TextStyle(fontSize: 25), placeholders: { ‘batman’: TextSpan( text: ‘Batman’, style: TextStyle( color: Colors.red, decoration: TextDecoration.underline, ), ), }, ), SizedBox(height: 220, child: Markdown(data: ‘’’
RichTextComposer(
'Hi \\\\{dad}, I am {batman}!',
style: TextStyle(fontSize: 25),
placeholders: {
'batman': TextSpan(
text: 'Batman',
style: TextStyle(
color: Colors.red,
decoration: TextDecoration.underline,
),
),
},
),
‘’’)) ], ), ), ); } }
更多关于Flutter富文本编辑插件flutter_richtext_composer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富文本编辑插件flutter_richtext_composer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,下面是一个关于如何使用 flutter_richtext_composer
插件来创建和编辑富文本的 Flutter 代码示例。这个插件允许你在 Flutter 应用中创建和编辑包含多种格式(如粗体、斜体、下划线、链接、图片等)的富文本。
首先,确保你的 pubspec.yaml
文件中已经添加了 flutter_richtext_composer
依赖:
dependencies:
flutter:
sdk: flutter
flutter_richtext_composer: ^x.y.z # 请替换为最新版本号
然后运行 flutter pub get
来获取依赖。
接下来,是一个完整的 Flutter 应用示例,展示了如何使用 flutter_richtext_composer
插件:
import 'package:flutter/material.dart';
import 'package:flutter_richtext_composer/flutter_richtext_composer.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
home: RichTextEditorScreen(),
);
}
}
class RichTextEditorScreen extends StatefulWidget {
@override
_RichTextEditorScreenState createState() => _RichTextEditorScreenState();
}
class _RichTextEditorScreenState extends State<RichTextEditorScreen> {
final RichTextController _controller = RichTextController();
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Flutter Rich Text Editor'),
),
body: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
RichTextComposer(
controller: _controller,
// 初始化富文本内容
initialText: RichText(
text: TextSpan(
text: 'Hello, ',
style: TextStyle(fontSize: 18),
children: <TextSpan>[
TextSpan(
text: 'World!',
style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold),
),
],
),
),
// 自定义工具栏
toolBarBuilder: (BuildContext context, RichTextComposerToolBarBuilder builder) {
return builder
.addFormat('bold', TextDecoration.bold)
.addFormat('italic', TextDecoration.italic)
.addFormat('underline', TextDecoration.underline)
.addLinkButton()
.addImageButton()
.build();
},
// 处理图片选择
onImagePicked: (File image) async {
// 这里你可以处理图片上传或者显示逻辑
// 这里简单示例:将图片文件路径转为Data URL并插入到富文本中
final byteData = await image.readAsBytes();
final base64String = base64Encode(byteData);
final dataUrl = "data:image/jpeg;base64,$base64String";
_controller.insertImage(dataUrl);
},
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: () {
// 获取富文本内容
final richText = _controller.text;
// 打印或处理富文本内容
print(richText);
},
tooltip: 'Get Rich Text',
child: Icon(Icons.done),
),
);
}
}
在这个示例中:
RichTextController
用于管理富文本内容。RichTextComposer
小部件用于显示和编辑富文本。toolBarBuilder
用于自定义工具栏,这里添加了加粗、斜体、下划线、链接和图片按钮。onImagePicked
回调函数用于处理图片选择,将选中的图片转换为 Data URL 并插入到富文本中。
运行这个示例应用,你将能够看到一个简单的富文本编辑器,支持多种文本格式和图片插入。