在此場景中，您嘗試使用 Qt 的 QWebPage 來呈現動態更新的頁面。但是，您在嘗試渲染第二個頁面時經常遇到崩潰。
問題分析
問題出在您的方法上。您正在為每個 URL 取得初始化一個新的 QApplication 和 QWebPage。相反，建議維護單一 QApplication 和 QWebPage，使用訊號和自訂處理來處理同一實例中的多個 URL。
建議的解決方案
以下是PyQt5 和PyQt4 的自訂🎜>
<code class="python">from PyQt5.QtCore import pyqtSignal, QUrl
from PyQt5.QtWidgets import QApplication
from PyQt5.QtWebEngineWidgets import QWebEnginePage
class WebPage(QWebEnginePage):
htmlReady = pyqtSignal(str, str)
def __init__(self, verbose=False):
super().__init__()
self._verbose = verbose
self.loadFinished.connect(self.handleLoadFinished)
def process(self, urls):
self._urls = iter(urls)
self.fetchNext()
def fetchNext(self):
try:
url = next(self._urls)
except StopIteration:
return False
else:
self.load(QUrl(url))
return True
def processCurrentPage(self, html):
self.htmlReady.emit(html, self.url().toString())
if not self self.fetchNext():
QApplication.instance().quit()
def handleLoadFinished(self):
self.toHtml(self.processCurrentPage)
def javaScriptConsoleMessage(self, *args, **kwargs):
if self._verbose:
super().javaScriptConsoleMessage(*args, **kwargs)</code>用法
<code class="python">from PyQt4.QtCore import pyqtSignal, QUrl
from PyQt4.QtGui import QApplication
from PyQt4.QtWebKit import QWebPage
class WebPage(QWebPage):
htmlReady = pyqtSignal(str, str)
def __init__(self, verbose=False):
super(WebPage, self).__init__()
self._verbose = verbose
self.mainFrame().loadFinished.connect(self.handleLoadFinished)
def process(self, urls):
self._urls = iter(urls)
self.fetchNext()
def fetchNext(self):
try:
url = next(self._urls)
except StopIteration:
return False
else:
self.mainFram().load(QUrl(url))
return True
def processCurrentPage(self):
self.htmlReady.emit(self.mainFrame().toHtml(), self.mainFrame().url().toString())
if not self.fetchNext():
QApplication.instance().quit()
def javaScripConsoleMessage(self ,* args, **kwargs):
if self._verbose:
super(WebPage, self).javaScriptConsoleMessage(*args, **kwargs)</code>用法
<code class="python">from PyQt5.QtCore import QUrl from PyQt5.QtWidgets import QApplication # PyQt5 url_list = ['https://example.com', 'https://example2.com'] app = QApplication(sys.argv) webpage = WebPage(verbose=True) webpage.htmlReady.connect(my_html_processor) webpage.process(url_list) sys.exit(app.exec_()) # PyQt4 from PyQt4.QtCore import QUrl from PyQt4.QtGui import QApplication url_list = ['https://example.com', 'https://example2.com'] app = QApplication(sys.argv) webpage = WebPage(verbose=True) webpage.htmlReady.connect(my_html_processor) webpage.process(url_list) sys.exit(app.exec_())</code>
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