1、在uniapp项目根目录的index.html中引入webview.js，注意：引入的时候要在body下面引入
<script type="text/javascript" src="https://js.cdn.aliyun.dcloud.net.cn/dev/uni-app/uni.webview.1.5.2.js"></script>
2、在h5页面中通知webview界面执行返回操作
uni.webView.postMessage({data:'这是H5传递的值'})3、在 webview页面中接受h5的通知，并执行关闭当前webview页面
<web-view :src="currentUrl" @message="message"></web-view>message(msg) { let pages = getCurrentPages()let page = pages[pages.length - 1];let currentPages = page.$getAppWebview()let children = currentPages.children()if (children.length === 0) {uni.navigateBack()} else {children[0].close()setTimeout(() => {uni.navigateBack()}, 80)}}, 
