angular 服務 基本用法

創建個服務
ng g service services/search

全局引入並配置服務
import {SearchService} from './services/search.service'
  providers: [SearchService],

在組件中，使用服務
import {SearchService} from '../../services/search.service'
sname = ''

    constructor(public store: SearchService) {
      this.sname = this.store.systemName
    }

  <p>{{sname}}</p>