dghd_miniapp/erp2/pages/index/index.wxml

<view class="container">
  <view class="title">二区商业-电费充值系统</view>
  <image class="img-style" src="/utils/images/home-img1.jpg"></image>

  <button class="btn_box" wx-if="{{tab == 1}}" bindtap="toLogin">微信授权登陆</button>
  <button class="btn_box" wx-if="{{tab == 2}}" bindtap="toOut">更换账号登陆</button>
  <!-- <view  class="btn_box" wx-if="{{tab == 1}}" bindtap="toLogin">微信授权登陆</view> -->
  <!-- <view class="btn_box" wx-if="{{tab == 2}}" bindtap="toOut">更换账号登陆</view> -->
</view>