如果我将路由器从@ angular / router注入一个组件然后使用它,我会收到一个错误,说不能调用未定义的navigateByUrl。
这是我使用路由器实例的组件:
import { Component, OnInit } from '@angular/core';
import { UserAccountService } from '../service/user-account.service'
import { Response } from '@angular/http';
import * as jQuery from 'jquery';
import { Router } from '@angular/router';
@Component({
selector: 'app-login',
templateUrl: './login.component.html',
styleUrls: ['./login.component.css']
})
export class LoginComponent implements OnInit {
constructor(private userAccountService: UserAccountService,
private appRouter: Router) { }
public loginClicked(): void {
this.userAccountService.Login(this.Email, this.Password).subscribe(this.loginCallback);
}
private loginCallback(data: any) {
if(data.success) {
localStorage.setItem('access_token', data.token);
this.appRouter.navigateByUrl('/dashboard'); //-> error
} else {
[...]
}
}
}
路线在app模块中定义:
const appRoutes: Routes = [
{ path: 'login', component: LoginComponent },
{ path: 'dashboard', component: DashboardComponent }
];
@NgModule({
declarations: [
AppComponent,
LoginComponent,
DashboardComponent
],
imports: [
BrowserModule,
FormsModule,
HttpModule,
RouterModule.forRoot(appRoutes)
],
providers: [UserAccountService],
bootstrap: [AppComponent]
})
在index.html中我定义了我的
我忘了什么吗?我不清楚如何让它正常工作......
答案 0 :(得分:2)
您可以使用箭头功能确保您仍然可以引用this
并且LoginComponent
实例:
....subscribe((data) => this.loginCallback(data));
另一个选择是使用绑定方法,如:
....subscribe(this.loginCallback.bind(this));
或在contructor中:
this.loginCallback = this.loginCallback.bind(this);
还有一个选项是在loginCallback
中使用箭头功能:
private loginCallback = (data: any) => {
...
}