小编Kau*_*hal的帖子

我有一个MasterComponent,它加载页眉,页脚,侧边栏等.在标题上有一个下拉列表,其选项在用户登录后设置.我希望标题是常量,即使我导航到加载不同子组件的不同路由.表示所选子选项不应更改,并且所有子组件都应该可以访问下拉值.在更改下拉值时,应更新/重新加载当前子组件.

我该如何处理这个问题？我想要事件监听器的功能.从MasterComponent更改模型后,重新加载当前子组件.在MasterComponent的变量变量更新中,ChildComponent将监听更新并运行某个函数或再次调用某个API并重新加载ChildComponent.

// routes
const appRoutes: Routes = [
    {
        path: '',
        redirectTo: 'login',
        pathMatch: 'full',
    },
    {   path: 'login', component: LoginComponent },
    {   path: 'logout', component: LogoutComponent },
    {
        path: '',
        component: MasterComponent,
        canActivate: [AuthGuard],
        children: [
            { path: 'record/create', component: RecordCreateComponent }, // create record for selectedRestaurant in MasterComponent
            { path: 'record/', component: RecordComponent }, // shows all record of current selectedRestaurant in MasterComponent
            { path: 'record/:id/update', component:RecordUpdateComponent }, // show form to edit record having id
            { …