uniapp中 app与webview的通讯-前端-CSS教程

uniapp中 app与webview的通讯

1.app->webview

app发送

此处使用evalJS方法

<template>
<web-view src="../../static/chat2.html"></web-view>
<button @click="chatRes">生成评估总结</button>
</template>
<script>
methods:{
   chatRes() {
		let str="需要发送的信息"
		const _funName = 'msgFromUniapp'
		const _data = {
			msg: str
		};
		const currentWebview = this.$scope.$getAppWebview().children()[0];
		currentWebview.evalJS(`${_funName}(${JSON.stringify(_data)})`);
		},
}
</script>

webview接收

<!DOCTYPE html>
<html lang="zh">
	<head>
		<meta charset="UTF-8">
		<meta name="viewport" content="width=device-width, initial-scale=1.0">
		<title>评测记录</title>
	</head>
	<body>
	</body>
	<script type="text/javascript" src="https://unpkg.***/@dcloudio/uni-webview-js@0.0.3/index.js"></script>
	<script>
		let msg=''
		window.msgFromUniapp = function(arg) {
			msg=arg.msg
			console.log(msg);
		}
		
	</script>
</html>

2.webview->app

webview发送

<!DOCTYPE html>
<html lang="zh">
	<head>
		<meta charset="UTF-8">
		<meta name="viewport" content="width=device-width, initial-scale=1.0">
		<title>评测记录</title>
	</head>
	<body>
		
	</body>
	<script type="text/javascript" src="https://unpkg.***/@dcloudio/uni-webview-js@0.0.3/index.js"></script>
	<script>
		const sendMsg = () => { 
            let str="待发送的信息"
			uni.postMessage({
				data: {
					msgContent:str
				}
			})
		}
	</script>
</html>

app接收

<template>
<web-view @message="handlerMessage" src="../../static/chat2.html"></web-view>
</template>
<script>
methods:{
    handlerMessage(event) {
		console.log(event.detail.data[0])
	},
}
</script>

3.踩坑记录

webview使用uni.postMessage发送消息给app时报uni.postMessage is not a function

解决方案

取消引入官方库uni-webview-js
改写uni为y_uni，调用y_uni.postMessage

<!DOCTYPE html>
<html lang="zh">
	<head>
		<meta charset="UTF-8">
		<meta name="viewport" content="width=device-width, initial-scale=1.0">
		<title>评测记录</title>
	</head>
	<body>
		
	</body>
	<script>
		let y_uni;
		! function(e, n) {
			y_uni = n();
			return
			console.log(4777)
			console.log(n())
			"object" == typeof exports && "undefined" != typeof module ? module.exports = n() : "function" == typeof define &&
				define.amd ? define(n) : (e = e || self).y_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 i(e, i) {
				return n.call(e, i)
			}
			var t = [];
		
			function r() {
				return window.__dcloud_weex_postMessage || window.__dcloud_weex_
			}
			var o = function(e, n) {
					var i = {
						options: {
							timestamp: +new Date
						},
						name: e,
						arg: n
					};
					if (r()) {
						if ("postMessage" === e) {
							var o = {
								data: [n]
							};
							return window.__dcloud_weex_postMessage ? window.__dcloud_weex_postMessage(o) : window
								.__dcloud_weex_.postMessage(JSON.stringify(o))
						}
						var a = {
							type: "WEB_INVOKE_APPSERVICE",
							args: {
								data: i,
								webviewIds: t
							}
						};
						window.__dcloud_weex_postMessage ? window.__dcloud_weex_postMessageToService(a) : window
							.__dcloud_weex_.postMessageToService(JSON.stringify(a))
					}
					if (!window.plus) return window.parent.postMessage({
						type: "WEB_INVOKE_APPSERVICE",
						data: i,
						pageId: ""
					}, "*");
					if (0 === t.length) {
						var d = plus.webview.currentWebview();
						if (!d) throw new Error("plus.webview.currentWebview() is undefined");
						var s = d.parent(),
							w = "";
						w = s ? s.id : d.id, t.push(w)
					}
					if (plus.webview.getWebviewById("__uniapp__service")) plus.webview.postMessageToUniNView({
						type: "WEB_INVOKE_APPSERVICE",
						args: {
							data: i,
							webviewIds: t
						}
					}, "__uniapp__service");
					else {
						var u = JSON.stringify(i);
						plus.webview.getLaunchWebview().evalJS('UniPlusBridge.subscribeHandler("'.concat(
							"WEB_INVOKE_APPSERVICE", '",').concat(u, ",").concat(JSON.stringify(t), ");"))
					}
				},
				a = {
					navigateTo: function() {
						var e = arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : {},
							n = e.url;
						o("navigateTo", {
							url: encodeURI(n)
						})
					},
					navigateBack: function() {
						var e = arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : {},
							n = e.delta;
						o("navigateBack", {
							delta: parseInt(n) || 1
						})
					},
					switchTab: function() {
						var e = arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : {},
							n = e.url;
						o("switchTab", {
							url: encodeURI(n)
						})
					},
					reLaunch: function() {
						var e = arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : {},
							n = e.url;
						o("reLaunch", {
							url: encodeURI(n)
						})
					},
					redirectTo: function() {
						var e = arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : {},
							n = e.url;
						o("redirectTo", {
							url: encodeURI(n)
						})
					},
					getEnv: function(e) {
						r() ? e({
							nvue: !0
						}) : window.plus ? e({
							plus: !0
						}) : e({
							h5: !0
						})
					},
					postMessage: function() {
						var e = arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : {};
						o("postMessage", e.data || {})
					}
				},
				d = /uni-app/i.test(navigator.userAgent),
				s = /Html5Plus/i.test(navigator.userAgent),
				w = /***plete|loaded|interactive/;
			var u = window.my && navigator.userAgent.indexOf(["t", "n", "e", "i", "l", "C", "y", "a", "p", "i", "l",
				"A"
			].reverse().join("")) > -1;
			var g = window.swan && window.swan.webView && /swan/i.test(navigator.userAgent);
			var v = window.qq && window.qq.miniProgram && /QQ/i.test(navigator.userAgent) && /miniProgram/i.test(
				navigator.userAgent);
			var c = window.tt && window.tt.miniProgram && /toutiaomicroapp/i.test(navigator.userAgent);
			var m = window.wx && window.wx.miniProgram && /micromessenger/i.test(navigator.userAgent) &&
				/miniProgram/i
				.test(navigator.userAgent);
			var p = window.qa && /quickapp/i.test(navigator.userAgent);
			var f = window.ks && window.ks.miniProgram && /micromessenger/i.test(navigator.userAgent) &&
				/miniProgram/i
				.test(navigator.userAgent);
			var l = window.tt && window.tt.miniProgram && /Lark|Feishu/i.test(navigator.userAgent);
			var _ = window.jd && window.jd.miniProgram && /micromessenger/i.test(navigator.userAgent) &&
				/miniProgram/i
				.test(navigator.userAgent);
			var E = window.xhs && window.xhs.miniProgram && /xhsminiapp/i.test(navigator.userAgent);
			for (var h, P = function() {
					window.UniAppJSBridge = !0, document.dispatchEvent(new CustomEvent("UniAppJSBridgeReady", {
						bubbles: !0,
						cancelable: !0
					}))
				}, b = [function(e) {
					if (d || s) return window.__dcloud_weex_postMessage || window.__dcloud_weex_ ? document
						.addEventListener("DOMContentLoaded", e) : window.plus && w.test(document
							.readyState) ? setTimeout(e, 0) : document.addEventListener("plusready", e), a
				}, function(e) {
					if (m) return window.WeixinJSBridge && window.WeixinJSBridge.invoke ? setTimeout(e, 0) :
						document.addEventListener("WeixinJSBridgeReady", e), window.wx.miniProgram
				}, function(e) {
					if (v) return window.QQJSBridge && window.QQJSBridge.invoke ? setTimeout(e, 0) : document
						.addEventListener("QQJSBridgeReady", e), window.qq.miniProgram
				}, function(e) {
					if (u) {
						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 (g) return document.addEventListener("DOMContentLoaded", e), window.swan.webView
				}, function(e) {
					if (c) 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) {
					if (f) return window.WeixinJSBridge && window.WeixinJSBridge.invoke ? setTimeout(e, 0) :
						document.addEventListener("WeixinJSBridgeReady", e), window.ks.miniProgram
				}, function(e) {
					if (l) return document.addEventListener("DOMContentLoaded", e), window.tt.miniProgram
				}, function(e) {
					if (_) return window.JDJSBridgeReady && window.JDJSBridgeReady.invoke ? setTimeout(e, 0) :
						document.addEventListener("JDJSBridgeReady", e), window.jd.miniProgram
				}, function(e) {
					if (E) return window.xhs.miniProgram
				}, function(e) {
					return document.addEventListener("DOMContentLoaded", e), a
				}], y = 0; y < b.length && !(h = b[y](P)); y++);
			h || (h = {});
			var B = "undefined" != typeof y_uni ? y_uni : {};
			if (!B.navigateTo)
				for (var S in h) i(h, S) && (B[S] = h[S]);
			return B.webView = h, B
		}));
		
		const sendMsg = async () => {
			let str="待发送的信息"
			y_uni.postMessage({
				data: {
					msgContent:str
				}
			})
		}
	</script>
</html>

webview