1、前期准备

简单封装一个用户首选项的工具类

import { preferences } from "@kit.ArkData";// 用户首选项方法封装
export class Preferences {private myPreferences: preferences.Preferences | null = null;// 初始化init(context: Context, options: preferences.Options) {this.myPreferences = preferences.getPreferencesSync(context, options);}// 获取参数getSync(key: string, defaultValue?: string) {if(this.myPreferences) {let val = this.myPreferences.getSync(key, defaultValue);return val;}else {return defaultValue;}}// 设置参数putSync(key: string, value: string) {if(this.myPreferences) {this.myPreferences.putSync(key, value)}}
}const myPreferences = new Preferences();
export { myPreferences }

在程序入口文件使用工具类

onWindowStageCreate(windowStage: window.WindowStage): void {// Main window is created, set main page for this abilityhilog.info(DOMAIN, 'testTag', '%{public}s', 'Ability onWindowStageCreate');// 初始化用户首选项工具类myPreferences.init(this.context, {name: 'myStore'})windowStage.loadContent('pages/Index', (err) => {if (err.code) {hilog.error(DOMAIN, 'testTag', 'Failed to load the content. Cause: %{public}s', JSON.stringify(err));return;}hilog.info(DOMAIN, 'testTag', 'Succeeded in loading the content.');});}

2、创建全局登录拦截器

import { HMInterceptor, HMInterceptorAction, HMInterceptorInfo, HMRouterMgr, IHMInterceptor } from '@hadss/hmrouter';
import { myPreferences } from "../utils/Preferences"@HMInterceptor({priority: 9,interceptorName: "LoginInterceptor",global: true // 定义为全局拦截器
})
export class LoginInterceptor implements IHMInterceptor {// 路由白名单private WhiteList: string[] = ["LoginPage", "MainPage"]handle(info: HMInterceptorInfo): HMInterceptorAction {console.log("目标页面：" + info.targetName)// 如果目标地址在白名单内，则不拦截if(info.targetName && this.WhiteList.includes(info.targetName)) {console.log("白名单内，不拦截")return HMInterceptorAction.DO_NEXT;}// 获取用户tokenconst token = myPreferences.getSync("token")console.log("token", token)const isLogin: boolean = token ? true : false;// 已登录 继续向下执行if(isLogin) {console.log("已登录，继续向下执行")return HMInterceptorAction.DO_NEXT;}else {console.log("未登录，跳转到登录页面")// 未登录 跳转到登录页面HMRouterMgr.replace({pageUrl: "LoginPage",skipAllInterceptor: true // 跳过所有拦截器})// 停止执行下一个拦截器，并且不执行路由跳转动画，不执行路由栈操作return HMInterceptorAction.DO_REJECT;}}
}

3、创建登录页面

import { HMRouter, HMRouterMgr } from '@hadss/hmrouter';
import { myPreferences } from '../utils/Preferences';@HMRouter({pageUrl: "LoginPage",
})
@Component
export struct LoginPage {build() {Column() {Text("登录页面").fontSize(30).fontWeight(FontWeight.Bold)// 通过用户首选项添加测试数据 并跳转到首页Button("跳转到 - MainPage").onClick((event: ClickEvent) => {// 向用户首选项添加 验证字段myPreferences.putSync("token", "123456")HMRouterMgr.push({pageUrl: "MainPage",})})}}
}

4、首页添加测试跳转

// 测试登录拦截Button("测试登录拦截，跳转TwoPage").onClick((event: ClickEvent) => {HMRouterMgr.push({pageUrl: "TwoPage"})})

5、执行结果