使用服务切换ngIf与单独的组件？

Question

所以我试图切换单独的组件中的一个元素，同时触发该功能来改变离子选项卡组件中的布尔值到目前为止，我有这个。

//App.module.ts - 减少为简洁

import { AppGlobals } from './globals'; 

@NgModule({ 
    providers: [AppGlobals] 
}) 

//Globals.ts着想

import { Injectable } from '@angular/core'; 
import { Observable } from 'rxjs/Observable'; 
import 'rxjs/add/operator/share'; 
import 'rxjs/add/operator/startWith'; 
import { BehaviorSubject } from 'rxjs/BehaviorSubject'; 

@Injectable() 
export class AppGlobals { 
    // use this property for property binding 
    public showSearch:BehaviorSubject<boolean> = new BehaviorSubject<boolean>(false); 

    setShowSearch(search){ 
     this.showSearch.next(search); 
     console.log(search); 
    } 
} 

// Tabs.ts

import { AppGlobals } from '../../app/globals'; 

constructor(private _appGlobals: AppGlobals) { 
    this._appGlobals.showSearch.subscribe(value => this.search = value); 
} 

toggleSearch() { 
    this.search = !this.search; 
    console.log(this.search); 
} 

//Tabs.html

(ionSelect)="toggleSearch();" 

//这是对某些HTML的单独组件

<div *ngIf="search" [ngClass]="{'slideInRight':showSearch, 'fadeOut':!showSearch}" class="search-filters animated"> 

内然而，这似乎并没有被工作，我切换值但全球“showSearch”似乎保持不变。在两个组件之间实现元素切换的正确方法是什么？

任何帮助都是非常赞赏。

Answer 1

您Tabs.ts将发出一个事件时toggleSearch()方法调用

toggleSearch() { 
    this.search = !this.search; 
    console.log(this.search); 
    this._appGlobals.showSearch.next(this.search); 
} 

在另一个组件

import { AppGlobals } from 'path/to/app/globals'; 
@Component({...}) 
export class SubComponent implements OnInit { 

    showSearch: boolean = false; 

    constructor(private _appGlobals: AppGlobals) { 

    } 

    ngOnInit() { 
     this._appGlobals.showSearch.subscribe(value => this.showSearch = value); 
    } 

} 

子模板

<div *ngIf="showSearch">content</div>