QWebEngineView与js交互

QWebEngineView与js交互

1.先用QWebChannel建立交互通道          

QWebChannel* channel = new QWebChannel(m_view);
m_view->page()->setWebChannel(channel);

2.在通道上注册交互对象变量。    

MFWebChannelBridge* pBridge = new MFWebChannelBridge(channel);
channel->registerObject("webChannelBridge", pBridge);

3.qt运行Js直接调用即可,注意:Js是异步运行的           

m_view->page()->runJavaScript("onShowJsAlert3()");

4.Qt运行js,如果需要返回值,则要写回调函数   

QString strJs = QString("onShowJsAlert4()");
    QWebEngineCallback<const QVariant&> resultCallback = [](const QVariant& v)
    {
        qDebug() << TR("4 Js的返回值是:") << v.toJsonObject();
    };
    m_view->page()->runJavaScript(strJs, resultCallback);

5.Js调用Qt,要先在<head>中添加<script src="qwebchannel.js"></script>

qwebchannel.js文件一般在Qt安装目录里可以找到。

然后页面中添加   

<script>
      new QWebChannel(qt.webChannelTransport, function(channel)
      {
        window.bridge = channel.objects.webChannelBridge;
      })

</script>

即可获取到注册的交互变量webChannelBridge。

最后js中直接运行Qt的槽函数即可:   

bridge.sltShowQtMsgBox1();

6.Js调用Qt,如果需要返回值,则要写异步处理函数        

          let qtRet = bridge.sltShowQtMsgBox2();
          Promise.resolve(qtRet).then(function (result)
          {
            console.log("2 asyn return Qt value=", result.vRet);
          }, function (err)
          {
          });

所有代码的7z压缩后的Base64编码如下:

(注意复制出来是一行,再Base64 Decode,保存成7z文件,再解压即可)

N3q8ry***AAQB/xZnhh8AAAAAAAAjAAAAAAAAAAchdHTgegUd/F0Ad67T4iHI9***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***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***PncoHrL9wm+cLOmY3VCsAA1tn0sAGLh9vroewGlnO9rrU5EIiPX66xhGui3Mtwdu/01mG/rGO96Pu4Z5/kvWw4OA5k14YwP9W0IQdOKOordT/a1A01AWePcZoIbvcU0B1RrB44W5cqz1FAobnn73/VoS0iiMFMUpindpJW9pop5aMYtqrnW36xm0gvFCPcZIHNVIVKJjA6O0cmnZF1Xb4xBgs4pPwXte5woxuKomtF9xFVH5dcQJL++TcveCR7lERQkJrxCY+RCkhMin8z9KbOjMyTyhDmBfHs4AKfA3WwEHP+mTaiv5sB23Om2Z4M5HMsFKkRMvb3s+MjhFt76AxZLEWO5wpoi2aTgEjSPYvn2YLootWJ2Bl3N1wnde27ogshX8lKy99f2NPs1FVH2YvatMMDk15c/r086ACqw4DjStG5uM97lZnbr5McdGyf30ihCiGXvNOEfa6y2GGPphLlhUeE8CelT0aL8uZ36WjddLUb8ipcuC6Mt/AbuNJ6km133DpM+lZV6Fcy3ewutJGPTul8t3kErgHJDQyyUGazTry1zBOmCT6Mc4ac0RFz03RogGITfDUhTliId1jnXNAglBPAoJAcuVQTv96ub2kztqKraaXLQXm5c+Ys1lCSqC1qp7av24t8O3ISZMrd/wzXR1YNbNUELl3KSqSJztkg+tPUmXJ1WA8l1Rfvm7GumNM6PvQvxEfjAsMUqlW69drS2kzns6Bo1elmelPEPAKN64/6+KRbDbkqLijMsLLhzquc4Oy1qITyKkgreKu1Zjd2iOPBGVaFsZB7yqIHUU5DZBPSE/nxU5ftR/9XqDt1GmUEabQ7fAS+dSFZcQ/Qd/rvshO8+mUBGWAQB41yJbjqhy4j1zZML/NtqK4AZOw4UxWnKHcDxOGPa7/FVoItjUbPKEGWqW3ViC8fduiP3cyjY4XRFQ9KU4Zoz0lNG9iJdILHcLydSB7pdkcDVrrAe5Cs30wdn8bXs3MUcg9jZolAD4VxydXuV5CP+JN0vu9I+qwacMieDanDU5fOzaxHzkbo4V6TB3ym1prSkEkwBq53F8TGLgJoshwNDdSA8Xv3HhhiKtgwFDk47/Sii9HW92ecrvtLfLbXNrp2St6kFy***PBJpHR0KpDcTxADkVstlbzERn2f8Q1JG4rD6hHFewVZqhlPvPzqKp5LVzqF1GbLzvqAJQ6V1UHuUQEluzB4Q4+/GP06QFhcthjeMV0os9rIfZv8w/xT6Ka+1I0WPPBWDS97Y4I+Ng+jU3GXjbJT/ux9INDCvXbVNybHXGGfEQHpABMdQqjGOvREAK6etrhO+q71zNgs1RvvioCjqs9sFsrfS8ZzdGURC9X7hgpNmkXBwgb1QhrvR4lS+g3IHzG+ux1sWFwrlNy3qcEg4/37UIfTg/ZFMW7tttKypaJWobiwg3gjB70uNfbpcveJ8dpGYu9***38RyfAIWfvFSmdUoI3aCdTR9w+bDEHbIDgGYJbYKxO/Maxs/VJ82RqD8uclzJQ0brdnsEApMwsZ4+yzGQLtc3IvkovHbvmQ/cY6+VU7812ghlFm81UVT3Dn9nv1BmXS3BJHGYBXmqd1QfEngX/Vvb7/exRjmvlNegKgbZoP2PHBpz0qmjVLyXaXc6t2zcDT24+CeIQiBdGwQKR6aWqkb3DiZtSVWiY4nU4HniBUwlPj+bwQI5Z59/ZEcQW2LSHmEfnU2UuhDpL3PXz0sPvRJjyRDD+iiQyUjvRz4eSmyzrywYY/Vp9+568h5m1NPbJ6HbN3seszhbv184KIuDX9Pridj2ORJKh4VZ8WO0Cd9QVNskCU+V0Mh/aIkXR/+xVotrH081ge9ofKzJ5rs8xe6mGZA***7BY2mWelRTwBMd0SkXmzjud4ZWqNLwZ+y9iIg/1Q/n4uLusm+ZxlA4gDnmyf5UyBYgyug7Rh85q8idz6nMIALGKs3AVit6yd9rKJdq1rg+2M3d/6FXvr5zIHeNYN3+SOTHdJIavqloy3Z8jZ2qfm9FkOtEGbdZXw4PWCkJ4P42dJGrANb3nPHPF5uqgTVzPFSVVZyTiIzU4X5SfZtMiuCDmxdsL2p2XO94xw9wgA0WDkDU/V7ZY5mqEYJASftgkPeq0QZDAKFqzG3SS+q/34kOpuss9NAMXjlBjNHPt7ZNxkYxFrMCyJaROQK0B+f/hYM13G9PXv3KcdabnQKWuZ+NDrMzClm8Chrsh68WhTjvkmpc+/fsJMrq8nQe8Hh***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***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***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***GUwWhbMzNsxQue1SMuHC7rwq/tNGMAU9vReY4PVqSBTPDUAI6HxuZnn657pkKJWfjsWbJPwP/JhHl+KX2lFNAW62F/wcgEdBAlY2YXN2sn+L9HCVVUYTmMRfuvH5Pvp1rLhFTNMcIZ6KjrEL51lg8o7qKHWtiS8mHGHh5JL/+ow+S26hxleThbyXCmlMJinYzx7nes6qPomtKeVFgGmj//xLRzdvwswhFhVv/xwnn2SrI4AkEU7guM1KZOZd2ZOvFgOJ6NsEZwqNyc/Bx4qQ/gDHsNeyM+G/v***8Xipcm3ulOIHQVYPxmEN9sKfnNZZKzO+It4C5JgzK+0lIEbeunQSmI55QtcRDptaWN/jRt4ceRLXJ91nni1A2safSunKCy3uvEYr5iA4xFs56uM+cfFsknUD0UBDx9TCmqpYJMi8398S0FZCGFJakKejJzcDHVvq0cK1EzVJTBFW0/PIgW2WU1WWU4F9lZcwf/tt2rP1HCEg00M9MdI0idmBk7egrMw0EU+CPvG59rYsYIzCEsXiZGkXmyp0ZR+q3BWgb7***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***ww7ke2fXE773hOdbkpffBb3oh6ouLngcXLyq33njyF98kN65CPC1VX5k/NlgCQ6tqgBM1YuT7KS/2jXbnuicS2+d2qRSjDVVpy7W+tXbgfwQ5RlXYpiH5WB+84ct3T1w2+***HFEcrPWbB1rMsbk6V9SP7swzb190ugcE9vbwQifQ8ehNiKUg5Rw9n/PuYZTpA7rMbljPboSEdnJJOwSKr4GIyfrifPbxSE60D5wORRLoFQLM8eh0fpzSBsKbc6cInNlwOR4WDxOi0w5kKVPQ2bYjmQv+/1Z2rLywYtw+aG1Z78aWDXU3riUyYoGkoahovcB8aiuby3cshZhWLoqhTkTqQF7sYX72tuD0GiX14XLMgZsTu4/oyyp/2mJTn0xkUsKiZlQVYMR9pPF***9g1fi76/8cMOGWw7hZPOT4R+iqd/d6v2uPJSkFg9e8KPXF7bwjjaPFRXti7fkXzjlvC+KUJAMD7fCwf3pwOxWnAxIifdWz1nAsH4g/cxsCwzMLP5Q6uZUK5D9pOLP2G5hqkvew6M/I8aPX2p0My2r3UOvxhB2dS3c1kEGAO/MrW0CWFfXIOdNtQZbUv/Syq2o***Rz+shKEMK5hcQVzfJf6yb/gmQpFIVneDEEIS/5MBRje1888HYjvE9VH2H2/8uIifZH3U2dhuV7asXvN4ZqZj+GXBIL+pJCmF088KTtqS4eLsYtGHRKhIqjxwg+RVsKMjShx91J3OebGx05UWPyrQmLeld/u6jqc6DgTNFPU8GpDCIdVRbFCMYVu4fueh9XIONVzhrlv3QtsOToxxrNgOGpETp03rAocgn3pkluW9Ai7zXt4L1UtcH7io0Hw9hlRm3NZu2jtZACTktSY9/es5eO59D7qVHV4GYR7v4sZZFzzt+tWL6+WJkvqVCGldkv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