乐趣区

关于flutter:Flutter-Getx-01-路由中间件鉴权传值跳转

jiezi

Getx

https://pub.flutter-io.cn/pac…

vscode 插件

Android Studio/Intellij 插件

本节指标

  • GetPage 对象
  • 路由层级管制
  • 路由中间件、鉴权
  • 404 解决
  • 路由跳转、替换、革除
  • 路由传值、返回值
  • 路由转场动画

开发环境

  • Flutter 2.1.0-12.1.pre
  • Dart 2.13.0
  • get: ^3.26.0

参考

  • getx example
  • getx_pattern
  • GetX Snippets

视频

https://www.bilibili.com/vide…

代码

https://github.com/ducafecat/…

注释

初始 getx 我的项目

  • pubspec.yaml
dependencies:
  ...
  get: ^3.26.0
  • lib/pages/home/index.dart
import 'package:flutter/material.dart';
import 'package:get/get.dart';

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text("首页"),
      ),
      body: ListView(
        children: [
          // 路由 & 导航
          Divider(),],
      ),
    );
  }
}
  • lib/common/routes/app_routes.dart
part of 'app_pages.dart';

abstract class AppRoutes {static const Home = '/home';}
  • lib/common/routes/app_pages.dart
import 'package:get/get.dart';

part 'app_routes.dart';

class AppPages {
  static const INITIAL = AppRoutes.Home;

  static final routes = [
    GetPage(
      name: AppRoutes.Home,
      page: () => HomeView(),
    ),
  ];
}
  • lib/main.dart
Future<void> main() async {runApp(MyApp());
}

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

  @override
  Widget build(BuildContext context) {
    return GetMaterialApp(
      debugShowCheckedModeBanner: false,
      initialRoute: AppPages.INITIAL,
      getPages: AppPages.routes,
    );
  }
}

编写 GetPage 定义

  • lib/pages/list/index.dart
class ListView extends StatelessWidget {const ListView({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text("列表页"),
      ),
    );
  }
}
  • lib/pages/list_detail/index.dart
class DetailView extends StatelessWidget {const DetailView({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text("详情页"),
      ),
      body: ListView(
        children: [
          ListTile(title: Text("导航 - 返回"),
            subtitle: Text('Get.back()'),
            onTap: () => Get.back(),
          ),
        ],
      ),
    );
  }
}
  • lib/common/routes/app_routes.dart
abstract class AppRoutes {
  static const Home = '/home';
  static const List = '/list';
  static const Detail = '/detail';
  • lib/common/routes/app_pages.dart
    GetPage(
      name: AppRoutes.Home,
      page: () => HomeView(),
      children: [
        GetPage(
          name: AppRoutes.List,
          page: () => ListView(),
          children: [
            GetPage(
              name: AppRoutes.Detail,
              page: () => DetailView(),
            ),
          ],
        ),
      ],
    ),

导航操作 命名、视图对象

  • lib/pages/home/index.dart
  ListTile(title: Text("导航 - 命名路由 home > list"),
    subtitle: Text('Get.toNamed("/home/list")'),
    onTap: () => Get.toNamed("/home/list"),
  ),
  ListTile(title: Text("导航 - 命名路由 home > list > detail"),
    subtitle: Text('Get.toNamed("/home/list/detail")'),
    onTap: () => Get.toNamed("/home/list/detail"),
  ),
  ListTile(title: Text("导航 - 类对象"),
    subtitle: Text("Get.to(DetailView())"),
    onTap: () => Get.to(DetailView()),
  ),

导航 - 革除上一个

  • lib/pages/home/index.dart
  ListTile(title: Text("导航 - 革除上一个"),
    subtitle: Text("Get.off(DetailView())"),
    onTap: () => Get.off(DetailView()),
  ),

导航 - 革除所有

  • lib/pages/home/index.dart
  ListTile(title: Text("导航 - 革除所有"),
    subtitle: Text("Get.offAll(DetailView())"),
    onTap: () => Get.offAll(DetailView()),
  ),

导航 -arguments 传值 + 返回值

  • lib/pages/home/index.dart
  ListTile(title: Text("导航 -arguments 传值 + 返回值"),
    subtitle: Text('Get.toNamed("/home/list/detail", arguments: {"id": 999})'),
    onTap: () async {
      var result = await Get.toNamed("/home/list/detail",
          arguments: {"id": 999});
      Get.snackbar("返回值", "success ->" + result["success"].toString());
    },
  ),
  • lib/pages/list_detail/index.dart
  _buildBackListTileRow(Map? val) {
    return val == null
        ? Container()
        : ListTile(title: Text("传值 id =" + val["id"].toString()),
            subtitle: Text('Get.back(result: {"success": true}'),
            onTap: () => Get.back(result: {"success": true}),
          );
  }

  @override
  Widget build(BuildContext context) {
    final details = Get.arguments as Map;
    final parameters = Get.parameters;

    return Scaffold(
      appBar: AppBar(title: Text("详情页"),
      ),
      body: ListView(
        children: [
          ListTile(title: Text("导航 - 返回"),
            subtitle: Text('Get.back()'),
            onTap: () => Get.back(),
          ),
          _buildBackListTileRow(details),
          _buildBackListTileRow(parameters),
        ],
      ),
    );
  }

导航 -parameters 传值 + 返回值

  • lib/pages/home/index.dart
  ListTile(title: Text("导航 -parameters 传值 + 返回值"),
    subtitle: Text('Get.toNamed("/home/list/detail?id=666")'),
    onTap: () async {var result = await Get.toNamed("/home/list/detail?id=666");
      Get.snackbar("返回值", "success ->" + result["success"].toString());
    },
  ),
  • lib/pages/list_detail/index.dart
  @override
  Widget build(BuildContext context) {final parameters = Get.parameters;

导航 - 参数传值 + 返回值

  • lib/common/routes/app_routes.dart
  static const Detail_ID = '/detail/:id';
  • lib/common/routes/app_pages.dart
  ...
  GetPage(
    name: AppRoutes.Detail_ID,
    page: () => DetailView(),
  ),
  • lib/pages/home/index.dart
  ListTile(title: Text("导航 - 参数传值 + 返回值"),
    subtitle: Text('Get.toNamed("/home/list/detail/777")'),
    onTap: () async {var result = await Get.toNamed("/home/list/detail/777");
      Get.snackbar("返回值", "success ->" + result["success"].toString());
    },
  ),

导航 -not found

  • lib/pages/notfound/index.dart
class NotfoundView extends StatelessWidget {const NotfoundView({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text("路由没有找到"),
      ),
      body: ListTile(title: Text("返回首页"),
        subtitle: Text('Get.offAllNamed(AppRoutes.Home)'),
        onTap: () => Get.offAllNamed(AppRoutes.Home),
      ),
    );
  }
}
  • lib/common/routes/app_routes.dart
  static const NotFound = '/notfound';
  • lib/common/routes/app_pages.dart
  static final unknownRoute = GetPage(
    name: AppRoutes.NotFound,
    page: () => NotfoundView(),
  );
  • lib/main.dart
  @override
  Widget build(BuildContext context) {
    return GetMaterialApp(
      ...
      unknownRoute: AppPages.unknownRoute,
    );
  }

导航 - 中间件 - 认证 Auth

  • lib/pages/login/index.dart
class LoginView extends StatelessWidget {const LoginView({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text("登录"),
      ),
      body: ListTile(title: Text("返回首页"),
        subtitle: Text('Get.offAllNamed(AppRoutes.Home)'),
        onTap: () => Get.offAllNamed(AppRoutes.Home),
      ),
    );
  }
}
  • lib/pages/my/index.dart
class MyView extends StatelessWidget {const MyView({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text("我的"),
      ),
      body: ListTile(title: Text("返回首页"),
        subtitle: Text('Get.offAllNamed(AppRoutes.Home)'),
        onTap: () => Get.offAllNamed(AppRoutes.Home),
      ),
    );
  }
}
  • lib/common/routes/app_routes.dart
  static const Login = '/login';
  static const My = '/my';
  • lib/common/middleware/router_auth.dart
class RouteAuthMiddleware extends GetMiddleware {
  @override
  int priority = 0;

  RouteAuthMiddleware({required this.priority});

  @override
  RouteSettings? redirect(String route) {Future.delayed(Duration(seconds: 1), () => Get.snackbar("提醒", "请先登录 APP"));
    return RouteSettings(name: AppRoutes.Login);
  }
}
  • lib/common/routes/app_pages.dart
    // 白名单
    GetPage(
      name: AppRoutes.Login,
      page: () => LoginView(),
    ),

    GetPage(
      name: AppRoutes.My,
      page: () => MyView(),
      middlewares: [RouteAuthMiddleware(priority: 1),
      ],
    ),
  • lib/pages/home/index.dart
  ListTile(title: Text("导航 - 中间件 - 认证 Auth"),
    subtitle: Text('Get.toNamed(AppRoutes.My)'),
    onTap: () => Get.toNamed(AppRoutes.My),
  ),

Transition 转场动画

  • lib/common/routes/app_pages.dart
  GetPage(
    name: AppRoutes.Detail_ID,
    page: () => DetailView(),
    transition: Transition.downToUp,
  ),

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