angular - canActivate 和 canDeactivate 不能一起工作

Question

（角度 6）我的问题：

• Route A有 canDeactivate，当我尝试去 Route B时我需要确认。
• Route B有 canActivate，我无权访问。
• 然后重定向到路由C，但此时路由A 的canDeactivate再次要求确认。

如何跳过第二次确认？

export interface PendingChangesComponent {
canDeactivate: () => boolean | Observable<boolean>;
}

@Injectable()
export class PendingChangesGuard implements 
CanDeactivate<PendingChangesComponent>, OnInit, OnChanges {

constructor(private confirmationservice: ConfirmationService,
    private translate: TranslateService) {
    console.log('construtor d');
}

ngOnInit() {
    console.log('init d');
}

ngOnChanges() {
    console.log('on changes d');
}

canDeactivate(component: PendingChangesComponent): boolean | Observable<boolean> {
    debugger

    if (component.canDeactivate()) {
        return true;
    }
    return Observable.create((observer: Observer<boolean>) => {
        this.confirmationservice.confirm({
            message: this.translate.instant('can.deactivate'),
            accept: () => {
                observer.next(true);
                observer.complete();
            },
            reject: () => {
                observer.next(false);
                observer.complete();
            }
        });
    });
}
}

标签： angularangular6

Answer 1

当您需要导航到 C 时，您应该返回 true canDeactivate() component method...您可以设置特定的组件字段并将其设置为 true，如下所示：

// everything inside the A component


canDeactivate():boolean {
   return this.allowRedirect || yourOtherConditions;
}

// ... right before you need to navigate to C
this.allowRedirect = true;
this.router.navigate(["routeC"]);