在PyQt5.9中, 应用QWebEngineView和QWebChannel技术, 可以进行HTML与本地代码进行交互.
要点:
- 创建交互对象, 基于QObject, 定义信息槽
- 创建QWebChannel, 在channel中注册交互对象
- 设置页面WebChannel
- 定义网页
- 在网页中包含qwebchannel.js
- 在DomReady时, 创建js QWebChannel, 连接到本地对象
实例:
一. 创建Html文件
<!DOCTYPE html><html lang="en" xmlns="http://www.w3.org/1999/xhtml"><head> ???<meta charset="utf-8" /> ???<script type="text/javascript" src="qwebchannel.js"></script> ???<title>QWebChannel测试</title> ???<script> ???????window.onload = function () { ???????????new QWebChannel(qt.webChannelTransport, function (channel) { ???????????????window.pyjs = channel.objects.pyjs; ???????????????alert(pyjs.myHello()) ???????????}); ???????} ???</script></head><body> ???</body></html>qwebchannel.js源代码
二. 创建Python代码
#!/usr/bin/env python# -*- coding:utf-8 -*-import sysfrom PyQt5.QtWidgets import QApplicationfrom PyQt5.QtCore import QObject, pyqtSlot, QUrlfrom PyQt5.QtWebChannel import QWebChannelfrom PyQt5.QtWebEngineWidgets import QWebEngineViewclass CallHandler(QObject): ???@pyqtSlot(result=str) ???def myHello(self): ???????print(‘call received‘) ???????return ‘hello, Python‘if __name__ == ‘__main__‘: ???app = QApplication(sys.argv) ???view = QWebEngineView() ???channel = QWebChannel() ???handler = CallHandler() ???channel.registerObject(‘pyjs‘, handler) ???view.page().setWebChannel(channel) ???url_string = "file:///D:/qt5/201709/webengine/test.html" ???view.load(QUrl(url_string)) ???view.show() ???sys.exit(app.exec_())
问题:
在PyQt5.9中, QWebEngineView响应调用pyqtSlot时, 没有返回值, 返回null. 没有查到相应文档
PyQt5.9 Html与本地代码交互实例
原文地址：http://www.cnblogs.com/yaoyu126/p/7524625.html