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書名： Ionic：Hybrid Mobile App Development
作者名： Rahat Khanna Sani Yusuf Hoc Phan
本章字數： 176字
更新時間： 2021-07-09 19:00:35

Ionic header and footer

Ionic has many directives to help common layouts in mobile apps. Ionic headers and footers are important directives for showing proper context for any view in a mobile app. The exact directives, name and their usage are detailed as follows.

The <ion-header-bar> directive

This directive adds a fixed header bar above any content. You can also add a subheader by adding a CSS class bar-subheader on the second <ion-header-bar> directive, which will be shown below the primary header. The sample code for usage is as follows:

<ion-header-bar align-title="left" class="bar-positive">
  <div class="buttons">
    <button class="button" ng-click="back()">Back</button>
  </div>
  <h1 class="title">All about Books</h1>
  <div class="buttons"> <button class="button">Logout</button>
  </div>
</ion-header-bar>

There are two attributes available on the directive to add functionality to the header bar as shown in the following table:

The <ion-footer-bar> directive

This directive adds a fixed footer bar below some content similar to the header bar. There can be a subfooter by adding the class bar-subfooter. The sample code for usage is as follows:

<ion-footer-bar align-title="left" class="bar-assertive">
  <div class="buttons">
    <button class="button">Back</button>
  </div>
  <h1 class="title">All about Books</h1>
  <div class="buttons" ng-click="logout()">
    <button class="button">Logout</button>
  </div>
</ion-footer-bar>

There is only one attribute available on the directive to add functionality to the footer bar as shown in the following table:

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Ionic：Hybrid Mobile App Development

Ionic header and footer

The <ion-header-bar> directive

The <ion-footer-bar> directive