<view class="page-head">
  <view class="page-head-title">navigation-bar</view>
  <view class="page-head-line"></view>
</view>

<navigation-bar
  title="{{nbTitle}}"
  loading="{{nbLoading}}"
  front-color="{{nbFrontColor}}"
  background-color="{{nbBackgroundColor}}"
/>

<button bindtap="setTitle">setTitle</button>
<button bindtap="showLoading">showLoading</button>
<button bindtap="setFontColor">setFontColor</button>
<button bindtap="setBackgroundColor">setBackgroundColor</button>
