这次给大家带来Angular4.x通过路由守卫实现动态跳转界面步骤详解，Angular4.x通过路由守卫实现动态跳转界面的注意事项有哪些，下面就是实战案例，一起来看一下。

需求：

最近在做一个网上商城的项目，技术用的是Angular4.x。有一个很常见的需求是：用户在点击“我的”按钮时读取cookie，如果有数据，则跳转到个人信息页面，否则跳转到注册或登录页面

解决

在这里通过Angular的路由守卫来实现该功能。

1. 配置路由信息const routes = [

{ path: 'home', component: HomeComponent },

{ path: 'product', component: ProductComponent },

{ path: 'register', component: RegisterComponent },

{ path: 'my', component: MyComponent },

{ path: 'login', component: LoginComponent, canActivate: [RouteguardService] },//canActivate就是路由守卫

{ path: '', redirectTo: '/home', pathMatch: 'full' }

]

2. 路由守卫条件(RouteguardService.ts)import { Injectable, Inject } from "@angular/core";

import { DOCUMENT } from "@angular/common";

import { CanActivate, ActivatedRouteSnapshot, RouterStateSnapshot, Router, NavigationStart } from "@angular/router";

import userModel from "./user.model";

@Injectable()

export class RouteguardService implements CanActivate {

constructor(private router: Router, @Inject(DOCUMENT) private document: any) {

}

canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): boolean {

// this.setCookie("userId", "18734132326", 10);

//读取cookie

var cookies = this.document.cookie.split(";");

var userInfo = { userId: "", pw: "" };

if (cookies.length > 0) {

for (var cookie of cookies) {

if (cookie.indexOf("userId=") > -1) {

userModel.accout = cookie.split("=")[0];

userModel.password = cookie.split("=")[1];

userModel.isLogin = false;

}

}

}

//获取当前路由配置信息

var path = route.routeConfig.path;

if (path == "login") {

if (!userModel.isLogin) {

//读取cookie如果没有用户信息，则跳转到当前登录页

return true;

} else {

//如果已经登录了则跳转到个人信息页面，下面语句是通过ts进行路由导航的

this.router.navigate(['product'])

}

}

}

setCookie(cname, cvalue, exdays) {

var d = new Date();

d.setTime(d.getTime() + (exdays * 24 * 60 * 60 * 1000));

var expires = "expires=" + d.toUTCString();

document.cookie = cname + "=" + cvalue + "; " + expires;

}

}

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