charge-front/src/wxcomponents/navigation-bar/index.wxml

<view class="navigation-observer" style="height:{{autoFixedDistance}}px;" wx:if="{{autoFixed}}"></view>
<view class="navigation-placeholder" style="height: {{placeholder ? height + 6 : 0}}px;"></view>
<view class="navigation navigation-{{autoFixed ? 'fixed':'relative'}}" style="height: {{height + 6}}px;background: {{background}};{{fixed ? autoFixedStyle : ''}}">
  <view class="navigation-bar" style="height: {{barHeight + 6}}px;line-height: {{barHeight}}px;color:{{color}};">
    <view wx:if="{{showBack && home}}" class="icon-menu" style="top:{{height - barHeight}}px;height:{{barHeight}}px;border-radius:{{barHeight}}px;">
      <view class="navigation-bar-font navigation-bar-font-fanhui" catchtap="back"></view>
      <view class="icon-menu-line"></view>
      <view class="navigation-bar-font navigation-bar-font-zhuye" catchtap="backHome"></view>
    </view>
    <view wx:if="{{!showBack && home}}" class="icon-home" style="top:{{height - barHeight}}px;height:{{barHeight}}px;width:{{barHeight}}px;" catchtap="backHome">
      <view class="navigation-bar-font navigation-bar-font-zhuye" ></view>
    </view>
    <view wx:if="{{showBack && !home}}" class="icon-home" style="top:{{height - barHeight}}px;height:{{barHeight}}px;width:{{barHeight}}px;border:none;background:none;" catchtap="back">
      <view class="navigation-bar-font navigation-bar-font-fanhui" style="color:{{color}};"></view>
    </view>
    <view>{{ title }}</view>
  </view>
</view>