PyQt5 等效于 QtWebEngineWidgets.QWebEngineView() 的 QtWebKitWidgets.QWebView.page.mainFrame()？
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【中文标题】PyQt5 等效于 QtWebEngineWidgets.QWebEngineView() 的 QtWebKitWidgets.QWebView.page.mainFrame()？【英文标题】：PyQt5 equivalent of QtWebKitWidgets.QWebView.page.mainFrame() for QtWebEngineWidgets.QWebEngineView()? 【发布时间】：2016-11-11 16:43:08 【问题描述】：我是 PyQt 的新手，开始玩弄以下代码（最初来自 this blog post）：
# Create an application
app = QApplication([])
# And a window
win = QWidget()
win.setWindowTitle('QWebView Interactive Demo')
# And give it a layout
layout = QVBoxLayout()
win.setLayout(layout)
# Create and fill a QWebView
view = QWebView()
view.sethtml('''
<html>
<head>
<title>A Demo Page</title>
<script language="javascript">
// Completes the full-name control and
// shows the submit button
function completeAndReturnName()
var fname = document.getElementById('fname').value;
var lname = document.getElementById('lname').value;
var full = fname + ' ' + lname;
document.getElementById('fullname').value = full;
document.getElementById('submit-btn').style.display = 'block';
return full;
</script>
</head>
<body>
<form>
<label for="fname">First name:</label>
<input type="text" name="fname" id="fname"></input>
<br />
<label for="lname">Last name:</label>
<input type="text" name="lname" id="lname"></input>
<br />
<label for="fullname">Full name:</label>
<input disabled type="text" name="fullname" id="fullname"></input>
<br />
<input style="display: none;" type="submit" id="submit-btn"></input>
</form>
</body>
</html>
''')
# A button to call our JavaScript
button = QPushButton('Set Full Name')
# Interact with the HTML page by calling the completeAndReturnName
# function; print its return value to the console
def complete_name():
frame = view.page().mainFrame()
print frame.evaluateJavaScript('completeAndReturnName();')
# Connect 'complete_name' to the button's 'clicked' signal
button.clicked.connect(complete_name)
# Add the QWebView and button to the layout
layout.addWidget(view)
layout.addWidget(button)
# Show the window and run the app
win.show()
app.exec_()
我做了一些小改动，试图让它在最新的 pyqt5 版本上运行，但我不明白我应该如何改变
frame = view.page().mainFrame()
为了使脚本运行无误。这是我到目前为止的代码：
from PyQt5 import QtWidgets, QtGui, QtCore
from PyQt5 import QtWebEngineWidgets
# Create an application
app = QtWidgets.QApplication([])
# And a window5
win = QtWidgets.QWidget()
win.setWindowTitle('QWebView Interactive Demo')
# And give it a layout
layout = QtWidgets.QVBoxLayout()
win.setLayout(layout)
# Create and fill a QWebView
#view = QtWebKitWidgets.QWebView() # depecated?
view = QtWebEngineWidgets.QWebEngineView()
view.setHtml('''
<html>
<head>
<title>A Demo Page</title>
<script language="javascript">
// Completes the full-name control and
// shows the submit button
function completeAndReturnName()
var fname = document.getElementById('fname').value;
var lname = document.getElementById('lname').value;
var full = fname + ' ' + lname;
document.getElementById('fullname').value = full;
document.getElementById('submit-btn').style.display = 'block';
return full;
</script>
</head>
<body>
<form>
<label for="fname">First name:</label>
<input type="text" name="fname" id="fname"></input>
<br />
<label for="lname">Last name:</label>
<input type="text" name="lname" id="lname"></input>
<br />
<label for="fullname">Full name:</label>
<input disabled type="text" name="fullname" id="fullname"></input>
<br />
<input style="display: none;" type="submit" id="submit-btn"></input>
</form>
</body>
</html>
''')
# A button to call our JavaScript
button = QtWidgets.QPushButton('Set Full Name')
# Interact with the HTML page by calling the completeAndReturnName
# function; print its return value to the console
def complete_name():
frame = view.page().mainFrame() # THIS raises an error. I'm stuck here.
print(frame.evaluateJavaScript('completeAndReturnName();'))
# Connect 'complete_name' to the button's 'clicked' signal
button.clicked.connect(complete_name)
# Add the QWebView and button to the layout
layout.addWidget(view)
layout.addWidget(button)
# Show the window and run the app
win.show()
app.exec_()
我见过this post，我认为这可能会有所帮助，但不幸的是我仍然坚持下去。有谁知道如何使用最新的 PyQt5 版本进行这项工作？非常感谢您的帮助。
【问题讨论】：
【参考方案1】：在 Qt Web 引擎中没有与 Qt WebKit QWebFrame 类等效的东西。框架仅被视为内容的一部分，因此没有专门的 API 来处理它们 - 只有一个 QWebEnginePage，它提供对整个 Web 文档的访问。
也没有evaluateJavaScript 方法。相反，有一个异步的runJavaScript 方法，它需要一个回调来接收结果。所以你的代码应该像这样重写：
def js_callback(result):
print(result)
def complete_name():
view.page().runJavaScript('completeAndReturnName();', js_callback)
【讨论】：
非常感谢您的解释和解决方案，现在可以了！以上是关于PyQt5 等效于 QtWebEngineWidgets.QWebEngineView() 的 QtWebKitWidgets.QWebView.page.mainFrame()？的主要内容，如果未能解决你的问题，请参考以下文章