title: how to pass data (or raise a event) from parent component to child component without using @input decorator in Ionic2
body: <p>I am working with Ionic 2 and have a use case where there is a home page (parent component) and inside home page there is a tab layout and in Ionic 2 each tab is a separate component (child components).</p>
  
  <p>so in one tab, I am showing list of users and in home page there is also a search bar through which user can search other users. So Now when user types in search bar, a function is getting triggered  which is defined in Home page (parent component) but when this function get triggered I need to raise a event in user tab (child component) in which I am going to filter the user list and display in user tab. Need help in solving this. The following is my code</p>
  
  <pre><code>&lt;ion-content&gt;
     &lt;ion-tabs&gt;
          //UsersTab comopnent class needs to know when getUsers function is triggered from home page
         &lt;ion-tab tabTitle="List of Users" [root]="UsersTab"&gt;&lt;/&lt;ion-tab&gt;
         &lt;ion-tab tabTitle="Tab 2" [root]="Tab2"&gt;&lt;/&lt;ion-tab&gt;
     &lt;/ion-tabs&gt;
  &lt;/ion-content&gt;
  &lt;ion-footer&gt;
      &lt;ion-toolbar&gt;
         &lt;ion-title&gt;
             // getUsers function will be defined is home page component class
             &lt;ion-searchbar (ionInput)="getUsers($event)"&gt;&lt;/ion-searchbar&gt;
         &lt;/ion-title&gt;
      &lt;/ion-toolbar&gt;
  &lt;/ion-footer&gt;
  </code></pre>
  
  <p>I hope my question is easy to understand.</p>