我使用 Flutter 已经超过一周了,想要创建一个阿拉伯语(从右到左)应用程序。
我正在阅读Internationalizing Flutter Apps,但它没有提到如何设置布局方向。
那么,如何在 Flutter 中显示从右到左(RTL)布局?
你有两个选择:
1。在所有设备上强制使用区域设置(和方向)
-- 方法1:本地化
将
flutter_localizations
包添加到您的 pubspec.yml
dependencies:
flutter:
sdk: flutter
flutter_localizations:
sdk: flutter
然后
import 'package:flutter/material.dart';
import 'package:flutter_localizations/flutter_localizations.dart';
MaterialApp(
localizationsDelegates: [
GlobalCupertinoLocalizations.delegate,
GlobalMaterialLocalizations.delegate,
GlobalWidgetsLocalizations.delegate,
],
supportedLocales: [
Locale("fa", "IR"), // OR Locale('ar', 'AE') OR Other RTL locales
],
locale: Locale("fa", "IR") // OR Locale('ar', 'AE') OR Other RTL locales,
.
.
.
);
-- 方法2:无本地化
MaterialApp(
.
.
.
builder: (context, child) {
return Directionality(
textDirection: TextDirection.rtl,
child: child,
);
},
.
.
.
);
2。根据设备区域设置设置布局方向 (如果用户手机区域设置是
RTL
语言并且存在于 supportedLocales
中,则您的应用程序以 RTL
模式运行,否则您的应用程序为 LTR
)
将
flutter_localizations
包添加到您的 pubspec.yml
dependencies:
flutter:
sdk: flutter
flutter_localizations:
sdk: flutter
然后
import 'package:flutter/material.dart';
import 'package:flutter_localizations/flutter_localizations.dart';
MaterialApp(
localizationsDelegates: [
GlobalCupertinoLocalizations.delegate,
GlobalMaterialLocalizations.delegate,
GlobalWidgetsLocalizations.delegate,
],
supportedLocales: [
Locale("en", "US"),
Locale("fa", "IR"), // OR Locale('ar', 'AE') OR Other RTL locales
],
.
.
.
);
注意:flutter 中的 RTL 语言有:
[
'ar', // Arabic
'fa', // Farsi
'he', // Hebrew
'ps', // Pashto
'ur', // Urdu
];
为整个应用程序设置
RTL
配置的最佳和最短的方法。
void main() {
runApp(
MaterialApp(
home: Directionality( // add this
textDirection: TextDirection.rtl, // set this property
child: HomePage(),
),
),
);
}
您需要创建一个 Builder 并使用
TextDirection.rtl
向其传递布局方向
new MaterialApp(
title: 'Flutter RTL',
color: Colors.grey,
builder: (BuildContext context, Widget child) {
return new Directionality(
textDirection: TextDirection.rtl,
child: new Builder(
builder: (BuildContext context) {
return new MediaQuery(
data: MediaQuery.of(context).copyWith(
textScaleFactor: 1.0,
),
child: child,
);
},
),
);
},
.
.
.
);
如果您需要反向显示文本,只需将其
textDirection
属性设置为 TextDirection.rtl
。
TextField 小部件的示例代码,
TextField(
textDirection: TextDirection.rtl,
decoration: InputDecoration(
labelText: "Enter Pashto Name",
),
),
文本小部件的示例代码,
Text(
"This text is in the other direction!"
textDirection: TextDirection.rtl,
),
只需将其附加到您的材料应用程序中即可:
builder: (BuildContext context, Widget child) {
return new Directionality(
textDirection: TextDirection.rtl,
child: new Builder(
builder: (BuildContext context) {
return new MediaQuery(
data: MediaQuery.of(context).copyWith(
textScaleFactor: 1.0,
),
child: child,
);
},
),
);
},
如果您使用 flutter_localizations: sdk:颤动
添加这些行来更改您的应用程序方向
supportedLocales: [
Locale("fa", "IR"),
Locale("en", 'US'),
],
locale: Locale("fa", "IR") // this is important line if not add this Apps will not change direction
GetMaterialApp( textDirection: TextDirection.rtl, home: SignUpScreen() // const HomeExpert() );