我有app组件(用于nav标头)和auth组件(用于登录)。
他们需要" isLoggedIn"属性可以用于应用程序更改其"登录"按钮到"退出"以及auth在登录后阻止登录尝试。
但我不知道我是否可以出口?从一个组件到另一个组件的属性。
我知道我可以使用服务,但应用程序没有适当的方法来订阅用户服务的映射数据。
如何让他们分享" isLoggedIn"属性?
以下是我的auth组件和app组件,其中包含用户身份验证服务。
export class AuthComponent {
private username = '';
private password = '';
private remembered: boolean = false;
isLoggedIn: boolean;
constructor(private userAuthenticationService: UserAuthenticationService) {}
onsubmit() {
this.userAuthenticationService
.logIn({ username: this.username, password: this.password })
.subscribe(response => {
this.isLoggedIn = response["success"];
});
}
}
//auth.component.html
<div class="loginbox">
<header>MAILBOY</header>
<form *ngIf="!isLoggedIn; else loggedInMessage">
<input type="text" [(ngModel)]="username" name="username" id="email" placeholder="이메일 주소"/>
<input type="password" [(ngModel)]="password" name="password" id="password" placeholder="비밀번호"/>
<label for="remember"><input type="checkbox" id="remember" [checked]="remembered" (change)="remembered = !remembered" />이메일 저장</label>
<button class="login" (click)="onsubmit()">로그인</button>
<h3>처음이신가요?</h3><button class="register"><a href="/register">회원가입</a></button>
</form>
<ng-template #loggedInMessage>
<h1>환영합니다! 메일 수신 여부를 설정해주세요.</h1>
</ng-template>
</div>
export class AppComponent {
isLoggedIn = 'false';
constructor(private userAuthenticationService: UserAuthenticationService) { }
}
//app.component.html
<div class="headerSpacing">
<nav>
<a routerLink="/home" routerLinkActive="active">홈</a>
<a *ngIf="isLoggedIn; else loggedInMessage" routerLink="/auth" routerLinkActive="active">로그인</a>
<ng-template #loggedInMessage>
<a (click)="logOut()">로그아웃</a>
</ng-template>
<a routerLink="/mail-setting" routerLinkActive="active">메일 수신 설정</a>
</nav>
</div>
<router-outlet></router-outlet>
最后是我的用户身份验证服务
@Injectable()
export class UserAuthenticationService {
headers = new Headers({
'Content-Type': 'application/json'
});
constructor(private http: Http) { }
/*
body: {
username,
password,
}
*/
logIn(user: Object) {
return this.http
.post('/auth/login', JSON.stringify(user),
{ headers: this.headers })
.map(data => { console.log(data);
return data.json() });
}
private handleError(error: any): Promise<any> {
console.log('An error occurred ', error);
return Promise.reject(error.message || error);
}
}
答案 0 :(得分:2)
您可以在此处使用BehaviorSubject。
在UserAuthenticationService中:
import { BehaviorSubject } from 'rxjs';
export class UserAuthenticationService {
private loggedIn = new BehaviorSubject(false);
// call this when you want to set loggedIn to true
login() {
this.loggedIn.next(true);
}
getIsLoggedIn() {
return this.loggedIn;
}
}
在app或auth组件或您需要该值的任何组件中,您可以订阅它:
constructor(private userAuthenticationService: UserAuthenticationService) {
userAuthenticationService.getIsLoggedIn().subscribe(bool => {
// use bool value here, you can set local var
// this.isLoggedIn = bool;
});
}