uniapp写H5，H5跳转到小程序
引入/open/js/jweixin-1.3.
<body>
<noscript>
<strong>Please enable JavaScript to continue.</strong>
</noscript>
<div id="app"></div>
<!-- built files will be auto injected -->
</body>
//注意： 写的位置（很重要）
<script type="text/javascript" src="/open/js/jweixin-1.3."></script>
跳转到小程序的某个页面
backCenter(){
wx.miniProgram.switchTab({url: '/pages/tabBar/mine/mine'})
wx.miniProgram.postMessage({ data: 'miniapp' })
}