深入了解Angular中的路由，如何快速上手？

今天PHP爱好者为您带来本篇文章带大家深入了解一下Angular中的路由，看看快速上手的方法，介绍一下匹配规则、路由传参、路由嵌套、路由守卫等，希望对大家有所帮助！希望对大家有所帮助。

import { Injectable } from "@angular/core"
import { CanActivateChild, ActivatedRouteSnapshot, RouterStateSnapshot, UrlTree } from "@angular/router"
import { Observable } from "rxjs"

@Injectable({
  providedIn: "root"
})
export class AdminGuard implements CanActivateChild {
  canActivateChild(): boolean | UrlTree {
    return true
  }
}

{
  path: "about",
  component: AboutComponent,
  canActivateChild: [AdminGuard],
  children: [
    {
      path: "introduce",
      component: IntroduceComponent
    }
  ]
}

3、CanDeactivate

检查用户是否可以退出路由。比如用户在表单中输入的内容没有保存，用户又要离开路由，此时可以调用该守卫提示用户

import { Injectable } from "@angular/core"
import {
  CanDeactivate,
  ActivatedRouteSnapshot,
  RouterStateSnapshot,
  UrlTree
} from "@angular/router"
import { Observable } from "rxjs"

export interface CanComponentLeave {
  canLeave: () => boolean
}

@Injectable({
  providedIn: "root"
})
export class UnsaveGuard implements CanDeactivate<CanComponentLeave> {
  canDeactivate(component: CanComponentLeave): boolean {
    if (component.canLeave()) {
      return true
    }
    return false
  }
}

{
  path: "",
  component: HomeComponent,
  canDeactivate: [UnsaveGuard]
}

import { CanComponentLeave } from "src/app/guards/unsave.guard"

export class HomeComponent implements CanComponentLeave {
  myForm: FormGroup = new FormGroup({
    username: new FormControl()
  })
  canLeave(): boolean {
    if (this.myForm.dirty) {
      if (window.confirm("有数据未保存, 确定要离开吗")) {
        return true
      } else {
        return false
      }
    }
    return true
  }

4、Resolve

允许在进入路由之前先获取数据，待数据获取完成之后再进入路由

$ ng g resolver <name>

import { Injectable } from "@angular/core"
import { Resolve } from "@angular/router"

type returnType = Promise<{ name: string }>

@Injectable({
  providedIn: "root"
})
export class ResolveGuard implements Resolve<returnType> {
  resolve(): returnType {
    return new Promise(function (resolve) {
      setTimeout(() => {
        resolve({ name: "张三" })
      }, 2000)
    })
  }
}

{
   path: "",
   component: HomeComponent,
   resolve: {
     user: ResolveGuard
   }
}

export class HomeComponent {
  constructor(private route: ActivatedRoute) {}
  ngOnInit(): void {
    console.log(this.route.snapshot.data.user)
  }
}

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