时间:2020-12-09 python教程 查看: 1291
准备工作
开发环境
安装依赖
pip install PyQt5
pip install PyQtWebEngine
Python端
1.使用QWebChannel的registerObject("JsBridge名","JsBridge")方法注册回调
2.JsBridge 对象
@QtCore.pyqtSlot(str)
def log(self, message):
print(message)
@QtCore.pyqtSlot(result=str)
def getName(self):
return "hello"
@QtCore.pyqtSlot(str, result=str)
def test(self, message):
print(message)
return "ok"
JavaScript端
在Html的
中添加<script src='qrc:///qtwebchannel/qwebchannel.js'></script>
调用
new QWebChannel(qt.webChannelTransport, function(channel) {
channel.objects.pythonBridge.test("hello",function(arg) {
console.log("Python message: " + arg);
alert(arg);
});
});
调试(Chrome DevTools)
Demo
Python
1.JsBridge
from PyQt5 import QtCore
class JsBridge(QtCore.QObject):
@QtCore.pyqtSlot(str, result=str)
def test(self, message):
print(message)
return "ok"
2.Application
from PyQt5 import QtCore
from PyQt5 import QtWebEngineWidgets
from PyQt5.QtCore import QDir
from PyQt5.QtWebChannel import QWebChannel
from PyQt5.QtWebEngineWidgets import QWebEngineView
from PyQt5.QtWidgets import *
class TestWindow(QMainWindow):
def __init__(self):
super().__init__()
self.webView = QWebEngineView()
self.webView.settings().setAttribute(
QtWebEngineWidgets.QWebEngineSettings.JavascriptEnabled, True)
channel = QWebChannel(self.webView.page())
self.webView.page().setWebChannel(channel)
self.python_bridge = JsBridge(None)
channel.registerObject("pythonBridge", self.python_bridge)
layout = QVBoxLayout()
layout.addWidget(self.webView)
widget = QWidget()
widget.setLayout(layout)
self.setCentralWidget(widget)
self.resize(900, 600)
self.setWindowTitle('Test')
qr = self.frameGeometry()
cp = QDesktopWidget().availableGeometry().center()
qr.moveCenter(cp)
self.move(qr.topLeft())
self.show()
html_path = QtCore.QUrl.fromLocalFile(QDir.currentPath() + "/assets/index.html")
self.webView.load(html_path)
if __name__ == '__main__':
app = QApplication(sys.argv)
m = TestWindow()
sys.exit(app.exec_())
JavaScript
index.html
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
<title>Test</title>
<script src='qrc:///qtwebchannel/qwebchannel.js'></script>
<script src="https://code.jquery.com/jquery-3.4.1.min.js"
integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo="
crossorigin="anonymous"></script>
</head>
<body>
<button id="test">test</button>
</body>
<script>
$(document).ready(function() {
new QWebChannel(qt.webChannelTransport, function(channel) {
$('#test').on('click', function() {
channel.objects.pythonBridge.test("hello",function(arg) {
console.log("Python message: " + arg);
alert(arg);
});
});
});
});
</script>
</html>
本文作者: liaoheng
本文链接: https://liaoheng.me/2019/12/23/PyQt5-QWebEngineView与JavaScript交互/
以上就是如何让PyQt5中QWebEngineView与JavaScript交互的详细内容,更多关于QWebEngineView与JavaScript交互的资料请关注python博客其它相关文章!