上一章讲解了用户登录的相关代码。用户登录成功后,就会进入好友模块,在好友模块中会根据不同的用户ID显示相应的好友列表,点击好友列表中的单个好友就会进入编辑单个好友页面,对好友信息进行编辑。点击列表页面的添加按钮,就会添加新的好友。
我们从这一章开始分析这个好友模块。
模块代码分析
模块基本代码如下:
import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { ReactiveFormsModule } from '@angular/forms';
import { HTTP_INTERCEPTORS } from '@angular/common/http';
import { BirthdaysComponent } from './birthdays/birthdays.component';
import { BirthdayListComponent } from './birthday-list/birthday-list.component';
import { BirthdayRoutingModule } from './birthday-routing.module';
import { BirthdayService } from './birthday.service';
import { BirthdayDetailComponent } from './birthday-detail/birthday-detail.component';
import { AuthGuardService } from '../auth-guard.service';
import { AuthInterceptor } from '../auth-interceptor';
@NgModule({
imports: [
CommonModule,
ReactiveFormsModule,
BirthdayRoutingModule
],
providers:[
BirthdayService,
AuthGuardService,
{
provide: HTTP_INTERCEPTORS,
useClass: AuthInterceptor,
multi:true
}
],
declarations: [BirthdaysComponent, BirthdayListComponent, BirthdayDetailComponent]
})
export class BirthdaysModule { }
在模块代码中除了作为子模块必须的导入的CommonModule模块,还导入了ReactiveFormsModule,BirthdayRoutingModule两个模块,ReactiveFormsModule模块用于编辑用户信息的提交表单,基本用法和用户注册的表单相同,BirthdayRoutingModule模块用于设置路由。
在providers中提供了BirthdayService、AuthGuardService和一个HTTP请求拦截器,分别用于提供数据服务、路由守卫服务和HTTP拦截服务。
在这个模块下共有三个组件:BirthdaysComponent、BirthdayListComponent、BirthdayDetailComponent。
下面开始逐项进行分析。
路由
路由模块BirthdayRoutingModule负责整个Birthdays模块的全部路由。代码如下:
import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { BirthdaysComponent } from './birthdays/birthdays.component';
import { BirthdayListComponent } from './birthday-list/birthday-list.component';
import { AuthGuardService } from '../auth-guard.service';
import { BirthdayDetailComponent } from './birthday-detail/birthday-detail.component';
const birthRoutes: Routes = [
{
path: 'birthday',
component: BirthdaysComponent,
canActivate: [AuthGuardService],
children: [
{ path: '', component: BirthdayListComponent },
{
path: ':id',
component: BirthdayDetailComponent
},
{
path:'new',
component:BirthdayDetailComponent
}
]
},
];
@NgModule({
imports: [RouterModule.forChild(birthRoutes)],
exports: [RouterModule]
})
export class BirthdayRoutingModule {}
当地址导航到localhost:4200/birthday时,首先加载BirthdaysComponent控件,BirthdaysComponent控件只要提供一个路由插座和用户的注销操作。
BirthdaysComponent代码比较简单:在这里直接给出html代码和类代码
html代码:
<button type="button" class="btn btn-secondary logout" (click)="logout()">
Logout</button>
<router-outlet></router-outlet>
控件类代码:
import { Component, OnInit } from '@angular/core';
import { Router } from '@angular/router';
import { JumbotronServive, Jumbotron } from '../../jumbotron.service';
import { AuthTokenService } from '../../authtoken.service';
@Component({
selector: 'app-birthdays',
templateUrl: './birthdays.component.html',
styleUrls: ['./birthdays.component.css']
})
export class BirthdaysComponent{
constructor(
private jumbServ: JumbotronServive,
private tokenServ: AuthTokenService,
private router: Router) {
jumbServ.setJumbotron(new Jumbotron('Friends', '', ''));
}
logout() {
this.tokenServ.setToken(null);
this.router.navigate(['/']);
}
}
当点击Logout按钮时,执行logout()函数,清空保存在本地的认证信息,并导航到首页。
...
<继续路由分析>
birthday路径下有三个子路由,分别为:"空",对应BirthdayListComponent组件。":id"和"new",对应同一个BirthdayDetailComponent组件,当导航到"new"路径时,[routerLink]="[0]",":id"的routerLink为具体的id。
这一篇先暂时写这么多,下一篇主要介绍三个主要的服务提供程序。敬请期待......
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