Python - 如何在QWebEnginePage中使用mainframe()方法[mainframe()错误]

Python - how to use mainframe() method in QWebEnginePage [error of mainframe()]

我在 PyQt5 代码中遇到错误。谁能帮我。

import sys
from PyQt5.QtWidgets import QApplication
from PyQt5.QtCore import QUrl
from PyQt5.QtWebEngineWidgets import QWebEngineView as QWebView

class Browser(QWebView):

    def __init__(self):
        QWebView.__init__(self)
        self.loadFinished.connect(self._result_available)

    def _result_available(self, ok):
        frame = self.page().mainFrame()
        print( unicode(frame.toHtml()).encode('utf-8'))

if __name__ == '__main__':
    app = QApplication(sys.argv)
    view = Browser()
    view.load(QUrl('http://www.google.com'))
    app.exec_()

输出:[错误]

  AttributeError                            Traceback (most recent call last) 
  <ipython-input-50-e1b5f3fc9054> in _result_available(self, ok)

   13

   14     def _result_available(self, ok):

  ---> 15              frame = self.page().mainFrame()    ------------- [ERROR]

   16         print( unicode(frame.toHtml()).encode('utf-8'))

   17 

  AttributeError: 'QWebEnginePage' object has no attribute 'mainFrame'

看来您使用的 Qt Webkit 指南已从 Qt 5.6 弃用,目前使用的 Qt WebEngine 已经更改了许多 类 和方法,因为它基于 Chromium,在此 link 你可以找到如何将 Qt Webkit 移植到 Qt WebEngine 的指南。在你的情况下没有mainFrame(),获取HTML的方式是异步的:

import sys
from PyQt5.QtWidgets import QApplication
from PyQt5.QtCore import QUrl
from PyQt5.QtWebEngineWidgets import QWebEngineView as QWebView

class Browser(QWebView):
    def __init__(self):
        QWebView.__init__(self)
        self.loadFinished.connect(self._result_available)

    def _result_available(self, ok):
        if ok:
            frame = self.page()
            frame.toHtml(self.callback)

    def callback(self, html):
        print(unicode(html).encode('utf-8'))


if __name__ == '__main__':
    app = QApplication(sys.argv)
    view = Browser()
    view.load(QUrl('http://www.google.com'))
    sys.exit(app.exec_())