一、前言
遇到 uniapp 打包的 APP 在 webview 内嵌入 uniapp 打包的 H5 页面的需求，并实现通信。本篇主要总结了如何实现并总结遇到的问题，希望可以帮助大家减少负担。
实现需求主要有三个地方需要处理：
index.html 的打包配置导入 uni.webview.js使用 myUni.getEnv() 导入和 myUni.webView.postMessage() 导出二、index.html 的打包配置
直接拷贝覆盖 index.html 即可
<!DOCTYPE html><html lang="zh-CN"><head><meta charset="utf-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><title><%= htmlWebpackPlugin.options.title %></title><!-- Open Graph data --><!-- <meta property="og:title" content="Title Here" /> --><!-- <meta property="og:url" content="http://www.example.com/" /> --><!-- <meta property="og:image" content="http://example.com/image.jpg" /> --><!-- <meta property="og:description" content="Description Here" /> --><script>var coverSupport = 'CSS' in window && typeof CSS.supports === 'function' && (CSS.supports('top: env(a)') || CSS.supports('top: constant(a)'))document.write('<meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0' +(coverSupport ? ', viewport-fit=cover' : '') + '" />')</script><link rel="stylesheet" href="<%= BASE_URL %>static/index.<%= VUE_APP_INDEX_CSS_HASH %>.css" /></head><body><noscript><strong>Please enable JavaScript to continue.</strong></noscript><div id="app"></div><!-- built files will be auto injected --><script type="text/javascript">var userAgent = navigator.userAgent;if (userAgent.indexOf('AlipayClient') > -1) {// 支付宝小程序的 JS-SDK 防止 404 需要动态加载，如果不需要兼容支付宝小程序，则无需引用此 JS 文件。document.writeln('<script src="https://appx/web-view.min.js"' + '>' + '<' + '/' + 'script>');} else if (/QQ/i.test(userAgent) && /miniProgram/i.test(userAgent)) {// QQ 小程序document.write('<script type="text/javascript" src="https://qqq.gtimg.cn/miniprogram/webview_jssdk/qqjssdk-1.0.0.js"><\/script>');} else if (/miniProgram/i.test(userAgent) && /micromessenger/i.test(userAgent)) {// 微信小程序 JS-SDK 如果不需要兼容微信小程序，则无需引用此 JS 文件。document.write('<script type="text/javascript" src="https://res.wx.qq.com/open/js/jweixin-1.4.0.js"><\/script>');} else if (/toutiaomicroapp/i.test(userAgent)) {// 头条小程序 JS-SDK 如果不需要兼容头条小程序，则无需引用此 JS 文件。document.write('<script type="text/javascript" src="https://s3.pstatp.com/toutiao/tmajssdk/jssdk-1.0.1.js"><\/script>');} else if (/swan/i.test(userAgent)) {// 百度小程序 JS-SDK 如果不需要兼容百度小程序，则无需引用此 JS 文件。document.write('<script type="text/javascript" src="https://b.bdstatic.com/searchbox/icms/searchbox/js/swan-2.0.18.js"><\/script>');} else if (/quickapp/i.test(userAgent)) {// quickappdocument.write('<script type="text/javascript" src="https://quickapp/jssdk.webview.min.js"><\/script>');}</script><!-- uni 的 SDK --><script type="text/javascript" src="<%= BASE_URL %>static/uni.webview.js"></script><script type="text/javascript" src="https://unpkg.com/@dcloudio/uni-webview-js@0.0.3/index.js"></script><script type="text/javascript">// 待触发 `UniAppJSBridgeReady` 事件后，即可调用 uni 的 API。document.addEventListener('UniAppJSBridgeReady', function() {uni.postMessage({data: {action: 'message'}});uni.getEnv(function(res) {console.log('当前环境：' + JSON.stringify(res));});});document.addEventListener('UniAppJSBridgeReady', function() {console.log('UniAppJSBridgeReady');webUni.getEnv(function(res) {console.log('当前环境：' + JSON.stringify(res));});});</script></body></html>三、导入 uni.webview.js
在文件根目录下新建 utils 目录，新建 uni.webview.1.5.2.js ，拷贝代码导入：
!function(e,n){"object"==typeof exports&&"undefined"!=typeof module?module.exports=n():"function"==typeof define&&define.amd?define(n):(e=e||self).uni=n()}(this,(function(){"use strict";try{var e={};Object.defineProperty(e,"passive",{get:function(){!0}}),window.addEventListener("test-passive",null,e)}catch(e){}var n=Object.prototype.hasOwnProperty;function t(e,t){return n.call(e,t)}var i=[],a=function(e,n){var t={options:{timestamp:+new Date},name:e,arg:n};if(window.__dcloud_weex_postMessage||window.__dcloud_weex_){if("postMessage"===e){var a={data:[n]};return window.__dcloud_weex_postMessage?window.__dcloud_weex_postMessage(a):window.__dcloud_weex_.postMessage(JSON.stringify(a))}var o={type:"WEB_INVOKE_APPSERVICE",args:{data:t,webviewIds:i}};window.__dcloud_weex_postMessage?window.__dcloud_weex_postMessageToService(o):window.__dcloud_weex_.postMessageToService(JSON.stringify(o))}if(!window.plus)return window.parent.postMessage({type:"WEB_INVOKE_APPSERVICE",data:t,pageId:""},"*");if(0===i.length){var r=plus.webview.currentWebview();if(!r)throw new Error("plus.webview.currentWebview() is undefined");var d=r.parent(),s="";s=d?d.id:r.id,i.push(s)}if(plus.webview.getWebviewById("__uniapp__service"))plus.webview.postMessageToUniNView({type:"WEB_INVOKE_APPSERVICE",args:{data:t,webviewIds:i}},"__uniapp__service");else{var w=JSON.stringify(t);plus.webview.getLaunchWebview().evalJS('UniPlusBridge.subscribeHandler("'.concat("WEB_INVOKE_APPSERVICE",'",').concat(w,",").concat(JSON.stringify(i),");"))}},o={navigateTo:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{},n=e.url;a("navigateTo",{url:encodeURI(n)})},navigateBack:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{},n=e.delta;a("navigateBack",{delta:parseInt(n)||1})},switchTab:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{},n=e.url;a("switchTab",{url:encodeURI(n)})},reLaunch:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{},n=e.url;a("reLaunch",{url:encodeURI(n)})},redirectTo:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{},n=e.url;a("redirectTo",{url:encodeURI(n)})},getEnv:function(e){window.plus?e({plus:!0}):e({h5:!0})},postMessage:function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{};a("postMessage",e.data||{})}},r=/uni-app/i.test(navigator.userAgent),d=/Html5Plus/i.test(navigator.userAgent),s=/complete|loaded|interactive/;var w=window.my&&navigator.userAgent.indexOf("AlipayClient")>-1;var u=window.swan&&window.swan.webView&&/swan/i.test(navigator.userAgent);var c=window.qq&&window.qq.miniProgram&&/QQ/i.test(navigator.userAgent)&&/miniProgram/i.test(navigator.userAgent);var g=window.tt&&window.tt.miniProgram&&/toutiaomicroapp/i.test(navigator.userAgent);var v=window.wx&&window.wx.miniProgram&&/micromessenger/i.test(navigator.userAgent)&&/miniProgram/i.test(navigator.userAgent);var p=window.qa&&/quickapp/i.test(navigator.userAgent);for(var l,_=function(){window.UniAppJSBridge=!0,document.dispatchEvent(new CustomEvent("UniAppJSBridgeReady",{bubbles:!0,cancelable:!0}))},f=[function(e){if(r||d)return window.__dcloud_weex_postMessage||window.__dcloud_weex_?document.addEventListener("DOMContentLoaded",e):window.plus&&s.test(document.readyState)?setTimeout(e,0):document.addEventListener("plusready",e),o},function(e){if(v)return window.WeixinJSBridge&&window.WeixinJSBridge.invoke?setTimeout(e,0):document.addEventListener("WeixinJSBridgeReady",e),window.wx.miniProgram},function(e){if(c)return window.QQJSBridge&&window.QQJSBridge.invoke?setTimeout(e,0):document.addEventListener("QQJSBridgeReady",e),window.qq.miniProgram},function(e){if(w){document.addEventListener("DOMContentLoaded",e);var n=window.my;return{navigateTo:n.navigateTo,navigateBack:n.navigateBack,switchTab:n.switchTab,reLaunch:n.reLaunch,redirectTo:n.redirectTo,postMessage:n.postMessage,getEnv:n.getEnv}}},function(e){if(u)return document.addEventListener("DOMContentLoaded",e),window.swan.webView},function(e){if(g)return document.addEventListener("DOMContentLoaded",e),window.tt.miniProgram},function(e){if(p){window.QaJSBridge&&window.QaJSBridge.invoke?setTimeout(e,0):document.addEventListener("QaJSBridgeReady",e);var n=window.qa;return{navigateTo:n.navigateTo,navigateBack:n.navigateBack,switchTab:n.switchTab,reLaunch:n.reLaunch,redirectTo:n.redirectTo,postMessage:n.postMessage,getEnv:n.getEnv}}},function(e){return document.addEventListener("DOMContentLoaded",e),o}],m=0;m<f.length&&!(l=f[m](_));m++);l||(l={});var E="undefined"!=typeof uni?uni:{};if(!E.navigateTo)for(var b in l)t(l,b)&&(E[b]=l[b]);return E.webView=l,E}));打开 main.js 导入 uni.webview.1.5.2.js：
import App from './App'// #ifndef VUE3import Vue from 'vue'import './uni.promisify.adaptor'// ***************************** 导入 ***************************** //import * as uni from './utils/uni.webview.1.5.2.js' document.addEventListener("UniAppJSBridgeReady", function() { // 这里必须更换uni，不然指向有误 Vue.prototype.myUni = uni });// *************************************************************** //Vue.config.productionTip = falseApp.mpType = 'app'const app = new Vue({ ...App})app.$mount()// #endif// #ifdef VUE3import { createSSRApp } from 'vue'export function createApp() { const app = createSSRApp(App) return { app }}// #endif四、页面使用
webview 页面：
<template><view><web-view @message="message" :src="url"></web-view></view></template><script>export default {data() {return {url: 'http://XXX.XXX.X.XXX:XXXX/?data='};},onLoad() { let data = [{ name:'测试数据' }]this.url += encodeURIComponent(JSON.stringify(data))},methods: { // 在小程序中没办法这样轻松获取数据，只有在离开页面、转发、销毁等情况下才可以获取，十分离谱message(arg) { // 获取 H5 提交参数console.log(arg)},}};</script>H5 页面
<template><view @click="sendMessage()"></view></template><script>export default {data() {return {}},mounted() {let data = this.getQuery('data') // 获取页面信息console.log('data=============>>>>>>>>', JSON.parse(data));},methods: {//取url中的参数值getQuery(name) {// 正则：[找寻'&' + 'url参数名字' = '值' + '&']（'&'可以不存在）let reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");let r = window.location.search.substr(1).match(reg);console.log(r);if (r != null) {// 对参数值进行解码return decodeURIComponent(r[2]);}return null;}, sendMessage() { // 提交参数let that = this;this.myUni.webView.postMessage({ // 提交参数一定要放在data内data: {id: 0,text: 'Id'},});},}}</script>五、参考
webview使用uniapp项目开发无法使用uni.postMessage（踩坑经验分享） - DCloud问答
uniapp使用webview嵌入vue页面及通信_uniapp webview页面和嵌入的子页面通信-CSDN博客
如何在uniapp中优雅地使用WebView - 林恒 - 博客园 (cnblogs.com)
web-view | uni-app官网 (dcloud.net.cn)
如何在uniapp中优雅地使用WebView - 林恒 - 博客园 (cnblogs.com)
web-view | uni-app官网 (dcloud.net.cn)
uni-app和web-view页面相互传参_uniapp webview传参-CSDN博客