PyQt5 window.close() 不会关闭窗口，但 window.open() 工作正常

Posted 2023-03-30

【中文标题】PyQt5 window.close() 不会关闭窗口，但 window.open() 工作正常

【英文标题】：PyQt5 window.close() does no close the window but window.open() works fine

【发布时间】：2019-06-01 08:31:37

【问题描述】：

我正在使用 PyQt5 QWebEngineView 在窗口上显示一个网站，该网站支持打开新窗口等基本功能。 我的代码适用于 window.open() 但对于网页上的 window.close() 函数，它会删除对窗口的引用，但除非用户手动关闭窗口，否则窗口实际上是存在的。

import sys

from PyQt5 import QtCore, QtWidgets, QtWebEngineWidgets
from PyQt5.QtCore import QUrl

from PyQt5.QtWidgets import QApplication


class MyWindow(QtWebEngineWidgets.QWebEngineView):

    currentFile = ''

    def __init__(self,windows, parent=None):
        super(MyWindow, self).__init__()

        self._windows = windows
        self._windows.append(self)


        self.load(QUrl("https://www.w3schools.com/jsref/tryit.asp?filename=tryjsref_win_close"))
        self.setAttribute(QtCore.Qt.WA_DeleteOnClose, True)  
        self.show()

    def createWindow(self, windows):
        print(windows)
        if windows == QtWebEngineWidgets.QWebEnginePage.WebBrowserTab:
            webView = MyWindow(self._windows)
            webView.resize(900, 780) # <----
            return webView

        elif windows == QtWebEngineWidgets.QWebEnginePage.WebDialog:
            webView = MyWindow(self._windows)
            webView.setAttribute(QtCore.Qt.WA_DeleteOnClose, True)           
            webView.resize(900, 780) # <----

            webView.show()          
            return webView

        elif windows == QtWebEngineWidgets.QWebEnginePage.acceptNavigationRequest:
            webView = MyWindow(self._windows)
            webView.setAttribute(QtCore.Qt.WA_DeleteOnClose, True)           
            webView.resize(900, 780) # <----
            webView.show()          
            return webView
        return super(MyWindow, self).createWindow(windows)




if __name__ == "__main__":
    app = QApplication(sys.argv)
    windows = []
    main = MyWindow(windows)  
    sys.exit(app.exec_())

当用户单击带有函数 window.close() 的按钮时，窗口仍然存在，但会从堆栈中引用（我知道这是因为该页面无法正常工作）

【问题讨论】：

此代码中没有方法open 或close。我不明白你在说什么。

它是一个用于打开和关闭新窗口的javascript函数。

【参考方案1】：

您必须为 QWebEngineView 设置一个 QWebEnginePage 并将 QWebEnginePage.windowCloseRequested 绑定到一个函数，如下所示：

import sys
import os

from PyQt5.QtCore import *
from PyQt5.QtWebEngineWidgets import *
from PyQt5.QtWidgets import *
from PyQt5 import QtGui
# from PyQt5.QtGui import QPixmap
# from PyQt5.QtGui import QDesktopServices


class MyWindow(QWebEngineView):

    def __init__(self, windows, parent=None):
        super(MyWindow, self).__init__()

        self._windows = windows
        self._windows.append(self)

        # Path
        scriptdir = os.path.dirname(os.path.realpath(__file__))

        # Profile
        self.profile = QWebEngineProfile().defaultProfile()
        self.profile.setPersistentCookiesPolicy(QWebEngineProfile.ForcePersistentCookies)
        self.browser_storage_folder = scriptdir + os.path.sep + '/.cookies'
        self.profile.setPersistentStoragePath(self.browser_storage_folder)

        # Page
        self.page = QWebEnginePage(self.profile, self)
        self.setPage(self.page)

        self.load(QUrl("https://www.w3schools.com/jsref/tryit.asp?filename=tryjsref_win_close"))

        self.setAttribute(Qt.WA_DeleteOnClose, True)
        self.show()

    def closeEvent(self, event):
        print('Close Event')

    def CloseRequest(self):
        self.webView.close()
        print('close')

    def createWindow(self, windows):
        print(windows)
        if windows == QWebEnginePage.WebBrowserTab:
            webView = MyWindow(self._windows)
            webView.resize(900, 780)
            return webView

        elif windows == QWebEnginePage.WebDialog:
            webView = MyWindow(self._windows)
            webView.setAttribute(Qt.WA_DeleteOnClose, True)
            page = QWebEnginePage(self)
            page.windowCloseRequested.connect(self.CloseRequest)
            webView.setPage(page)
            webView.resize(900, 780)
            webView.show()
            self.webView = webView
            return webView

        elif windows == QWebEnginePage.acceptNavigationRequest:
            webView = MyWindow(self._windows)
            webView.setAttribute(Qt.WA_DeleteOnClose, True)
            webView.resize(900, 780)
            webView.show()
            return webView
        return super(MyWindow, self).createWindow(windows)


if __name__ == "__main__":
    app = QApplication(sys.argv)
    windows = []
    main = MyWindow(windows)
    sys.exit(app.exec_())