Qt中的QWebEngineView
编译器一定要选择MSVC。本人使用的是【MSVC2019-64】酷炫界面的可以使用这种方式。其他使用Qt.。使用这种方式交叉开发。可以使用一个html界面使用一个QWebEngineView对象。每个对象放置在// 页面1: 登录页 (mermaid.html)// 页面2: 主页 (WebTest.html)// 使用 qrc 资源// 添加到 stacked widget// index 0/
第1章 本地目录结构
1.1 自己写的两个网页(html)
- mermaid.html (自己写的网页界面)
- WebTest.html (自己写的网页界面)
- qwebchannel.js (Qt下载安装之后,会在安装目录下有这个文件,需要将安装目录下的改文件拷贝到自己项目目录下)
1.2 创建一个资源文件(xxxx.qrc)
在此我创建的文件为:resources.qrc。文件名自己随便,但是后缀要为【.qrc】
文件内容:
<RCC>
<qresource prefix="/">
<file>mermaid.html</file>
</qresource>
<qresource prefix="/">
<file>WebTest.html</file>
</qresource>
<qresource prefix="/qt">
<file>qwebchannel.js</file>
</qresource>
</RCC>
文件中的内容是将资源文件,管理起来。引入自己的html文件和JS脚本。
前缀可以自己定:【<qresource prefix="/">】或者【<qresource prefix="/qt">】。定好前缀之后,以后在Qt代码中就要按照这个前缀来拼接出资源文件的位置。
1.3 将资源文件引入到Qt项目
在Qt的项目配置文件目录【xxx.pro】,我的是【Demo2.pro】中引入资源文件
RESOURCES += \
resources.qrc
第2章 资源源码
2.1 mermaid.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Login Page</title>
<!-- 添加:引入 qwebchannel.js -->
<!-- 引入 Qt WebChannel 支持 -->
<script src="qrc:///qt/qwebchannel.js"></script>
<script>
window.onload = function() {
if (typeof qt === 'undefined') {
console.error('Qt WebChannel transport not available!');
return;
}
new QWebChannel(qt.webChannelTransport, function(channel) {
// 获取C++端暴露的对象“bridge33”
var bridge = channel.objects.bridge33;
console.log('bridge =', bridge);
// 检查C++端是否有这个信号函数 “sendUsername”
if (!bridge.sendUsername) {
console.error('sendUsername 信号不存在!检查 C++ 信号声明和 moc');
return;
}
console.log('emit sendUsername() exist');
bridge.sendUsername.connect(function(username) {
console.log('Received username: ', username);
console.log('username.length: ', username.length);
console.log('username.charCodeAt(0): ', username.charCodeAt(0));
var input = document.querySelector("input[name='username']");
if (input) {
input.value = username;
console.log('full success');
} else {
console.error('输入框未找到');
}
});
// html界面被正确渲染,发送信号给C++
bridge.onWebChannelReady22();
// 登录按钮
document.querySelector(".btn").onclick = function() {
var username = document.querySelector("input[name='username']").value;
var password = document.querySelector("input[name='password']").value;
if (bridge.receiveLoginInfo) {
bridge.receiveLoginInfo(username, password);
//console.log('已发送登录信息:', username, password);
} else {
console.error('bridge.receiveLoginInfo 不存在');
}
};
// 注册链接点击
document.querySelector("#register-link").onclick = function(event) {
event.preventDefault();
//console.log('用户点击了【Sign up】');
bridge.onRegisterClicked();
};
});
};
</script>
<style>
* { margin: 0; padding: 0; }
html { height: 100%; }
body { height: 100%; }
.container {
height: 100%;
background-image: linear-gradient(to right, #fbc2eb, #a6c1ee);
}
.login-wrapper {
background-color: #fff;
width: 358px;
height: 588px;
border-radius: 15px;
padding: 0 50px;
position: relative;
left: 50%;
top: 50%;
transform: translate(-50%, -50%);
}
.header {
font-size: 38px;
font-weight: bold;
text-align: center;
line-height: 200px;
}
.input-item {
display: block;
width: 100%;
margin-bottom: 20px;
border: 0;
padding: 10px;
border-bottom: 1px solid rgb(128, 125, 125);
font-size: 15px;
outline: none;
}
.input-item:placeholder {
text-transform: uppercase;
}
.btn {
text-align: center;
padding: 10px;
width: 100%;
margin-top: 40px;
background-image: linear-gradient(to right, #a6c1ee, #fbc2eb);
color: #fff;
cursor: pointer; /* 增加光标提示 */
}
.msg {
text-align: center;
line-height: 88px;
}
a {
text-decoration-line: none;
color: #abc1ee;
}
</style>
</head>
<body>
<div class="container">
<div class="login-wrapper">
<div class="header">Login</div>
<div class="form-wrapper">
<input type="text" name="username" placeholder="username" class="input-item">
<input type="password" name="password" placeholder="password" class="input-item">
<div class="btn">Login</div>
</div>
<div class="msg">
Don't have account?
<a href="#" id="register-link">Sign up</a>
</div>
</div>
</div>
</body>
</html>
2.2 WebTest.html
<!DOCTYPE html>
<html lang="en">
<!-- https://codepen.io/danielkvist/pen/LYNVyPL -->
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
:root {
/* COLORS */
--white: #e9e9e9;
--gray: #333;
--blue: #0367a6;
--lightblue: #008997;
/* RADII */
--button-radius: 0.7rem;
/* SIZES */
--max-width: 758px;
--max-height: 420px;
font-size: 16px;
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
}
body {
align-items: center;
background-color: var(--white);
background: url("https://res.cloudinary.com/dbhnlktrv/image/upload/v1599997626/background_oeuhe7.jpg");
/* 决定背景图像的位置是在视口内固定,或者随着包含它的区块滚动。 */
/* https://developer.mozilla.org/zh-CN/docs/Web/CSS/background-attachment */
background-attachment: fixed;
background-position: center;
background-repeat: no-repeat;
background-size: cover;
display: grid;
height: 100vh;
place-items: center;
}
.form__title {
font-weight: 300;
margin: 0;
margin-bottom: 1.25rem;
}
.link {
color: var(--gray);
font-size: 0.9rem;
margin: 1.5rem 0;
text-decoration: none;
}
.container {
background-color: var(--white);
border-radius: var(--button-radius);
box-shadow: 0 0.9rem 1.7rem rgba(0, 0, 0, 0.25),
0 0.7rem 0.7rem rgba(0, 0, 0, 0.22);
height: var(--max-height);
max-width: var(--max-width);
overflow: hidden;
position: relative;
width: 100%;
}
.container__form {
height: 100%;
position: absolute;
top: 0;
transition: all 0.6s ease-in-out;
}
.container--signin {
left: 0;
width: 50%;
z-index: 2;
}
.container.right-panel-active .container--signin {
transform: translateX(100%);
}
.container--signup {
left: 0;
opacity: 0;
width: 50%;
z-index: 1;
}
.container.right-panel-active .container--signup {
animation: show 0.6s;
opacity: 1;
transform: translateX(100%);
z-index: 5;
}
.container__overlay {
height: 100%;
left: 50%;
overflow: hidden;
position: absolute;
top: 0;
transition: transform 0.6s ease-in-out;
width: 50%;
z-index: 100;
}
.container.right-panel-active .container__overlay {
transform: translateX(-100%);
}
.overlay {
background-color: var(--lightblue);
background: url("https://cdn.pixabay.com/photo/2018/08/14/13/23/ocean-3605547_1280.jpg");
background-attachment: fixed;
background-position: center;
background-repeat: no-repeat;
background-size: cover;
height: 100%;
left: -100%;
position: relative;
transform: translateX(0);
transition: transform 0.6s ease-in-out;
width: 200%;
}
.container.right-panel-active .overlay {
transform: translateX(50%);
}
.overlay__panel {
align-items: center;
display: flex;
flex-direction: column;
height: 100%;
justify-content: center;
position: absolute;
text-align: center;
top: 0;
transform: translateX(0);
transition: transform 0.6s ease-in-out;
width: 50%;
}
.overlay--left {
transform: translateX(-20%);
}
.container.right-panel-active .overlay--left {
transform: translateX(0);
}
.overlay--right {
right: 0;
transform: translateX(0);
}
.container.right-panel-active .overlay--right {
transform: translateX(20%);
}
.btn {
background-color: var(--blue);
background-image: linear-gradient(90deg, var(--blue) 0%, var(--lightblue) 74%);
border-radius: 20px;
border: 1px solid var(--blue);
color: var(--white);
cursor: pointer;
font-size: 0.8rem;
font-weight: bold;
letter-spacing: 0.1rem;
padding: 0.9rem 4rem;
text-transform: uppercase;
transition: transform 80ms ease-in;
}
.form>.btn {
margin-top: 1.5rem;
}
.btn:active {
transform: scale(0.95);
}
.btn:focus {
outline: none;
}
.form {
background-color: var(--white);
display: flex;
align-items: center;
justify-content: center;
flex-direction: column;
padding: 0 3rem;
height: 100%;
text-align: center;
}
.input {
background-color: #fff;
border: none;
padding: 0.9rem 0.9rem;
margin: 0.5rem 0;
width: 100%;
}
@keyframes show {
0%,
49.99% {
opacity: 0;
z-index: 1;
}
50%,
100% {
opacity: 1;
z-index: 5;
}
}
</style>
</head>
<body>
<div class="container right-panel-active">
<!-- Sign Up -->
<div class="container__form container--signup">
<form action="#" class="form" id="form1">
<h2 class="form__title">Sign Up</h2>
<input type="text" placeholder="User" class="input" />
<input type="email" placeholder="Email" class="input" />
<input type="password" placeholder="Password" class="input" />
<button class="btn">Sign Up</button>
</form>
</div>
<!-- Sign In -->
<div class="container__form container--signin">
<form action="#" class="form" id="form2">
<h2 class="form__title">Sign In</h2>
<input type="email" placeholder="Email" class="input" />
<input type="password" placeholder="Password" class="input" />
<a href="#" class="link">Forgot your password?</a>
<button class="btn">Sign In</button>
</form>
</div>
<!-- Overlay -->
<div class="container__overlay">
<div class="overlay">
<div class="overlay__panel overlay--left">
<button class="btn" id="signIn">Sign In</button>
</div>
<div class="overlay__panel overlay--right">
<button class="btn" id="signUp">Sign Up</button>
</div>
</div>
</div>
</div>
<script>
const signInBtn = document.getElementById("signIn");
const signUpBtn = document.getElementById("signUp");
const fistForm = document.getElementById("form1");
const secondForm = document.getElementById("form2");
const container = document.querySelector(".container");
signInBtn.addEventListener("click", () => {
container.classList.remove("right-panel-active");
});
signUpBtn.addEventListener("click", () => {
container.classList.add("right-panel-active");
});
fistForm.addEventListener("submit", (e) => e.preventDefault());
secondForm.addEventListener("submit", (e) => e.preventDefault());
</script>
</body>
</html>
2.3 bridge文件
头文件
#ifndef CBridge_H
#define CBridge_H
#include <QObject>
class CBridge : public QObject
{
Q_OBJECT
public:
explicit CBridge(QObject *parent = nullptr);
signals:
/**
* C++端向HTML端传递数据
* html端可以通过别名获取到该信号
*/
void sendUsername(const QString &username);
void switchPage();
public slots:
// 新增:接收用户名和密码的槽函数
void receiveLoginInfo44(const QString &username, const QString &password);
// JS 调用这个表示准备好了
void onWebChannelReady22();
void onRegisterClicked();
};
#endif // CBridge_H
源文件
#include "bridge.h"
#include <QTimer>
#include <QDebug>
CBridge::CBridge(QObject *parent)
: QObject(parent)
{
}
// 实现接收用户名和密码的槽函数
void CBridge::receiveLoginInfo44(const QString &username, const QString &password) {
qDebug() << "User name: " << username;
qDebug() << "PassWord" << password;
}
void CBridge::onWebChannelReady22()
{
qDebug() << "JS 已准备就绪,现在发送用户名";
emit sendUsername("张三"); // 现在发,100% 安全
qDebug() << "发送用户名";
}
void CBridge::onRegisterClicked()
{
qDebug() << "Sign up";
emit switchPage();
}
2.4 main.cpp
#include <QApplication>
#include <QWebEngineView>
#include <QWebChannel>
#include <QUrl>
#include <QDir>
#include "bridge.h"
int main(int argc, char *argv[]) {
QApplication app(argc, argv);
QWebEngineView view;
view.resize(800, 600);
view.setWindowTitle("Qt + HTML 登录界面");
/*
* 通讯桥
*/
CBridge bridge;
QWebChannel channel;
// 给CBridge实例对象起一个别名“bridge33”,暴露给html。html端就使用这个别名
channel.registerObject("bridge33", &bridge);
view.page()->setWebChannel(&channel);
// 在加载完成后再显示窗口
QObject::connect(&view, &QWebEngineView::loadFinished, [&](bool ok) {
if (ok) {
view.show(); // 显示Html
} else {
qWarning() << "Failed to load page!";
}
});
QObject::connect(&bridge, &CBridge::switchPage, [&](){
qDebug() << "加载 homepage.html";
// 通过资源配置文件加载资源文件
view.load(QUrl("qrc:///WebTest.html"));
});
// 通过写绝对路径加载资源文件
QString filePath = "F:/MyTest/test20250911/Demo2/mermaid.html";
QUrl fileUrl = QUrl::fromLocalFile(filePath);
view.load(fileUrl); // 开始加载
return app.exec();
}
第3章 总结
编译器一定要选择MSVC。本人使用的是【MSVC2019-64】
酷炫界面的可以使用这种方式。其他使用Qt.。使用这种方式交叉开发。
可以使用一个html界面使用一个QWebEngineView对象。每个对象放置在
QStackedWidget *stackedWidget = new QStackedWidget(&mainWindow);
// 页面1: 登录页 (mermaid.html)
QWebEngineView *loginView = new QWebEngineView();
loginView->load(QUrl::fromLocalFile("F:/MyTest/test20250911/Demo2/mermaid.html"));
// 页面2: 主页 (WebTest.html)
QWebEngineView *homeView = new QWebEngineView();
homeView->load(QUrl("qrc:///WebTest.html")); // 使用 qrc 资源
// 添加到 stacked widget
stackedWidget->addWidget(loginView); // index 0
stackedWidget->addWidget(homeView); // index 1
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