介绍了webkit到webengine的和webengine中js和C++互相调用的方法

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pro文件

文件中需要加入”QT += core gui webenginewidgets”这句话，不然提示找不到文件

QT       += core guiQT       += core gui webenginewidgetsgreaterThan(QT_MAJOR_VERSION, 4): QT += widgetsTARGET = WebEngineTEMPLATE = app# The following define makes your compiler emit warnings if you use# any feature of Qt which has been marked as deprecated (the exact warnings# depend on your compiler). Please consult the documentation of the# deprecated API in order to know how to port your code away from it.DEFINES += QT_DEPRECATED_WARNINGS# You can also make your code fail to compile if you use deprecated APIs.# In order to do so, uncomment the following line.# You can also select to disable deprecated APIs only up to a certain version of Qt.#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0SOURCES += \        main.cpp \        mainwindow.cpp \    cwebconnct.cppHEADERS += \        mainwindow.h \    cwebconnct.hFORMS += \        mainwindow.ui

main.cpp

#include "mainwindow.h"#include <QApplication>#include <QWebEngineView>#include <QWebChannel>#include "cwebconnct.h"int main(int argc, char *argv[]){    QApplication a(argc, argv);    QWebEngineView view;    //view.setUrl(QUrl(QStringLiteral("http://html5test.com")));    view.setUrl(QUrl("file:///C:/Users/Documents/QT/WebEngine/html/test.html"));    view.resize(1024, 768);    view.show();    QWebChannel* webchannel= new QWebChannel(&view);    CWebConnct webconnet(NULL);    webchannel->registerObject(QStringLiteral("content"),&webconnet);    view.page()->setWebChannel(webchannel);    return a.exec();}

桥接类

#ifndef CWEBCONNCT_H#define CWEBCONNCT_H#include <QObject>#include <QDebug>class CWebConnct : public QObject{    Q_OBJECTpublic:    explicit CWebConnct(QObject *parent = nullptr);signals:    void sendText(const QString &text);public slots:    void receiveText(const QString &r_text);};#endif // CWEBCONNCT_H

#include "cwebconnct.h"CWebConnct::CWebConnct(QObject *parent) : QObject(parent){}void CWebConnct::receiveText(const QString &r_text){    qDebug()<<(QObject::tr("Received message: %1").arg(r_text));    emit sendText(r_text);//此处是异步通信    qDebug()<<(QObject::tr("Received message end"));}

测试的html文件

需要在html中引用qwebchannel.js文件

<!DOCTYPE html><html><head>    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />    <title>弹窗</title>    <script type="text/javascript" src="./qwebchannel.js"></script>    <script type="text/javascript">        window.onload = function() { //所有的必须在里面进行写吗？？？         var    content;                    new QWebChannel(qt.webChannelTransport, function(channel) {                // make dialog object accessible globally             content = channel.objects.content;                    //把对象赋值到JS中             document.getElementById("sendtest").onclick=function (){                content.receiveText("sss");               }            content.sendText.connect(function(message) {                         //连接QT中发出的信号，里面的message是参数;只需要在QT中调用此函数也就是sendText就可以调用JS函数                    alert("Received message: " + message);                              });            });        }    </script></head><body><button id="sendtest" >测试webchannel</button></html>

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