PyQt5 QtWebChannel 实现 Python脚本与网页Js脚本的数据传递

试了一天，终于调通了。贴代码~

Python主函数代码

import sys
import Web_UI
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtCore import QObject,pyqtProperty
from PyQt5.QtWebChannel import QWebChannel
from MySharedObject import  MySharedObject
from PyQt5.QtWidgets import QApplication
import os

BASE_DIR = os.path.dirname(__file__)#获取当前文件夹的绝对路径

if __name__ == '__main__':
    app = QtWidgets.QApplication(sys.argv)
    MainWindow = QtWidgets.QFrame()
    ui = Web_UI.Ui_Form()
    ui.setupUi(MainWindow)
    ui.webView1.load(QtCore.QUrl(r""+BASE_DIR+"/web_file3.html"))

    channel = QWebChannel() ##创建一个QwebChannel对象，用于传递PyQt的参数到JavaScript
    myObj = MySharedObject()
    print(myObj.strval)

    channel.registerObject('bridge', myObj)
    ui.webView1.page().setWebChannel(channel)

    MainWindow.show()
    sys.exit(app.exec_())


继承了QWidget类的MySharedObject(Python文件)

from PyQt5.QtCore import  QObject
from PyQt5.QtCore import pyqtProperty
from PyQt5.QtWidgets import QWidget,QMessageBox

class MySharedObject(QWidget):
    def __init__(self,strval = '100'):
        super(MySharedObject,self).__init__()
        self.strval = strval
    def _getStrValue(self):
        return self.strval
    def _setStrValue(self,str):
        self.strval = str
        print('获得页面参数：%s'% str)
        QMessageBox.information(self,"Infomation", '获得的页面参数%s' % str)
    #需要定义的对外发布的方法
    strValue= pyqtProperty(str,_getStrValue,_setStrValue)

页面代码HTML

<!DOCTYPE html>
        <html>
            <head>
                <meta charset="UTF-8">
                <title>A Demo Page</title>
                <script src = "qwebchannel.js"></script>

                <script language = "javascript">
                    function completeAndReturnName(){
                        var fname = document.getElementById('fname').value;
                        var lname = document.getElementById('lname').value;
                        var fullname = fname +' '+ lname;

                        document.getElementById('fullname').value = fullname;
                        document.getElementById('submit-btn').style.display = 'block';
                        return fullname;
                    }
                    document.addEventListener("DOMContentLoaded",function(){
                        new QWebChannel(qt.webChannelTransport, function (channel) {
                            //alert('111 chanel='+channel)
                            window.bridge = channel.objects.bridge;
                            alert('bridge='+bridge.strValue +'\n从pyqt传来的参数='+window.bridge.strValue);
                            //alert('111 chanel='+ channel.objects.strValue)
                        })
                    } )
                    function onShowMsgBox() {
                        if(window.bridge != null){
                            var fname = document.getElementById('fname').value;
                            window.bridge.strValue = fname;  //调用对象
                        }
                    }
                </script>
            </head>

            <body>
                <form>
                    <label id = "name">User Name:</label>
                    <input type = "text" name = "fname" id = "fname"></input>
                    <br />
                    <input type = "button" value="传递参数到pyqt" onclick="onShowMsgBox()"></input>
                    <br />
                    <input type = "reset" value="重置"></input>

                </form>
            </body>
        </html>

实现效果

PyQt5 QtWebChannel 实现 Python脚本与网页Js脚本的数据传递