QWebView не отображает веб-страницу

Question

Недавно я создал веб-браузер, использующий PyQt4 в PyCharm. Когда я запустил программу, мой веб-браузер выскочил, я набрал:

http://www.google.com

Однако экран остался белым.

Вот код ниже:

from PyQt4 import QtCore, QtGui

try:
    _fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
    def _fromUtf8(s):
        return s

try:
    _encoding = QtGui.QApplication.UnicodeUTF8
    def _translate(context, text, disambig):
        return QtGui.QApplication.translate(context, text, disambig, _encoding)
except AttributeError:
    def _translate(context, text, disambig):
        return QtGui.QApplication.translate(context, text, disambig)

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName(_fromUtf8("MainWindow"))
        MainWindow.resize(1269, 670)
        MainWindow.setAutoFillBackground(False)
        MainWindow.setStyleSheet(_fromUtf8("background: url(:/path/to-your-resource.png)"))
        self.centralwidget = QtGui.QWidget(MainWindow)
        self.centralwidget.setObjectName(_fromUtf8("centralwidget"))
        self.tb_back = QtGui.QToolButton(self.centralwidget)
        self.tb_back.setGeometry(QtCore.QRect(10, 20, 41, 31))
        icon = QtGui.QIcon()
        icon.addPixmap(QtGui.QPixmap(_fromUtf8(":/icons/icons/back.png")), QtGui.QIcon.Normal, QtGui.QIcon.Off)
        self.tb_back.setIcon(icon)
        self.tb_back.setIconSize(QtCore.QSize(32, 32))
        self.tb_back.setObjectName(_fromUtf8("tb_back"))
        self.tb_reload = QtGui.QToolButton(self.centralwidget)
        self.tb_reload.setGeometry(QtCore.QRect(60, 20, 41, 31))
        icon1 = QtGui.QIcon()
        icon1.addPixmap(QtGui.QPixmap(_fromUtf8(":/icons/icons/reload.png")), QtGui.QIcon.Normal, QtGui.QIcon.Off)
        self.tb_reload.setIcon(icon1)
        self.tb_reload.setIconSize(QtCore.QSize(32, 32))
        self.tb_reload.setObjectName(_fromUtf8("tb_reload"))
        self.tb_forword_2 = QtGui.QToolButton(self.centralwidget)
        self.tb_forword_2.setGeometry(QtCore.QRect(110, 20, 41, 31))
        icon2 = QtGui.QIcon()
        icon2.addPixmap(QtGui.QPixmap(_fromUtf8(":/icons/icons/forword.png")), QtGui.QIcon.Normal, QtGui.QIcon.Off)
        self.tb_forword_2.setIcon(icon2)
        self.tb_forword_2.setIconSize(QtCore.QSize(32, 32))
        self.tb_forword_2.setObjectName(_fromUtf8("tb_forword_2"))
        self.tb_home = QtGui.QToolButton(self.centralwidget)
        self.tb_home.setGeometry(QtCore.QRect(160, 20, 41, 31))
        icon3 = QtGui.QIcon()
        icon3.addPixmap(QtGui.QPixmap(_fromUtf8(":/icons/icons/home.png")), QtGui.QIcon.Normal, QtGui.QIcon.Off)
        self.tb_home.setIcon(icon3)
        self.tb_home.setIconSize(QtCore.QSize(32, 32))
        self.tb_home.setObjectName(_fromUtf8("tb_home"))
        self.ln_addressbar = QtGui.QLineEdit(self.centralwidget)
        self.ln_addressbar.setGeometry(QtCore.QRect(210, 20, 491, 31))
        self.ln_addressbar.setObjectName(_fromUtf8("ln_addressbar"))
        self.tb_search = QtGui.QToolButton(self.centralwidget)
        self.tb_search.setGeometry(QtCore.QRect(710, 20, 41, 31))
        icon4 = QtGui.QIcon()
        icon4.addPixmap(QtGui.QPixmap(_fromUtf8(":/icons/icons/search.png")), QtGui.QIcon.Normal, QtGui.QIcon.Off)
        self.tb_search.setIcon(icon4)
        self.tb_search.setIconSize(QtCore.QSize(32, 32))
        self.tb_search.setObjectName(_fromUtf8("tb_search"))
        self.webView = QtWebKit.QWebView(self.centralwidget)
        self.webView.setGeometry(QtCore.QRect(0, 60, 1261, 591))
        self.webView.setUrl(QtCore.QUrl(_fromUtf8("about:blank")))
        self.webView.setObjectName(_fromUtf8("webView"))
        MainWindow.setCentralWidget(self.centralwidget)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        MainWindow.setWindowTitle(_translate("MainWindow", "Neel\'s Web Browser", None))
        self.tb_back.setText(_translate("MainWindow", "...", None))
        self.tb_reload.setText(_translate("MainWindow", "...", None))
        self.tb_forword_2.setText(_translate("MainWindow", "...", None))
        self.tb_home.setText(_translate("MainWindow", "...", None))
        self.tb_search.setText(_translate("MainWindow", "...", None))

from PyQt4 import QtWebKit


if __name__ == "__main__":
    import sys
    app = QtGui.QApplication(sys.argv)
    MainWindow = QtGui.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())

Чтобы решить эту проблему, я попытался

www.google.com

Тем не менее проблема сохраняется.

Если это поможет, я запустил этот код в приложении сообщества PyCharm.

Answer 1

Проблема в том, что даже если вы разместите URL, QWebView не знает, что вы его разместили, для этого вы должны использовать сигнал (в этом случае editingFinished, которая выполняется при нажатии клавиши ввода или возврата), другая проблема заключается в том, что вам нужно добавить префикс: http://

self.ln_addressbar.editingFinished.connec(self.OnEditingFinished)

def OnEditingFinished(self):
    self.webView.setUrl(QtCore.QUrl("http://"+self.ln_addressbar.text()))

Полный код:

from PyQt4 import QtCore, QtGui

try:
    _fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
    def _fromUtf8(s):
        return s

try:
    _encoding = QtGui.QApplication.UnicodeUTF8
    def _translate(context, text, disambig):
        return QtGui.QApplication.translate(context, text, disambig, _encoding)
except AttributeError:
    def _translate(context, text, disambig):
        return QtGui.QApplication.translate(context, text, disambig)

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName(_fromUtf8("MainWindow"))
        MainWindow.resize(1269, 670)
        MainWindow.setAutoFillBackground(False)
        MainWindow.setStyleSheet(_fromUtf8("background: url(:/path/to-your-resource.png)"))
        self.centralwidget = QtGui.QWidget(MainWindow)
        self.centralwidget.setObjectName(_fromUtf8("centralwidget"))
        self.tb_back = QtGui.QToolButton(self.centralwidget)
        self.tb_back.setGeometry(QtCore.QRect(10, 20, 41, 31))
        icon = QtGui.QIcon()
        icon.addPixmap(QtGui.QPixmap(_fromUtf8(":/icons/icons/back.png")), QtGui.QIcon.Normal, QtGui.QIcon.Off)
        self.tb_back.setIcon(icon)
        self.tb_back.setIconSize(QtCore.QSize(32, 32))
        self.tb_back.setObjectName(_fromUtf8("tb_back"))
        self.tb_reload = QtGui.QToolButton(self.centralwidget)
        self.tb_reload.setGeometry(QtCore.QRect(60, 20, 41, 31))
        icon1 = QtGui.QIcon()
        icon1.addPixmap(QtGui.QPixmap(_fromUtf8(":/icons/icons/reload.png")), QtGui.QIcon.Normal, QtGui.QIcon.Off)
        self.tb_reload.setIcon(icon1)
        self.tb_reload.setIconSize(QtCore.QSize(32, 32))
        self.tb_reload.setObjectName(_fromUtf8("tb_reload"))
        self.tb_forword_2 = QtGui.QToolButton(self.centralwidget)
        self.tb_forword_2.setGeometry(QtCore.QRect(110, 20, 41, 31))
        icon2 = QtGui.QIcon()
        icon2.addPixmap(QtGui.QPixmap(_fromUtf8(":/icons/icons/forword.png")), QtGui.QIcon.Normal, QtGui.QIcon.Off)
        self.tb_forword_2.setIcon(icon2)
        self.tb_forword_2.setIconSize(QtCore.QSize(32, 32))
        self.tb_forword_2.setObjectName(_fromUtf8("tb_forword_2"))
        self.tb_home = QtGui.QToolButton(self.centralwidget)
        self.tb_home.setGeometry(QtCore.QRect(160, 20, 41, 31))
        icon3 = QtGui.QIcon()
        icon3.addPixmap(QtGui.QPixmap(_fromUtf8(":/icons/icons/home.png")), QtGui.QIcon.Normal, QtGui.QIcon.Off)
        self.tb_home.setIcon(icon3)
        self.tb_home.setIconSize(QtCore.QSize(32, 32))
        self.tb_home.setObjectName(_fromUtf8("tb_home"))
        self.ln_addressbar = QtGui.QLineEdit(self.centralwidget)
        self.ln_addressbar.setGeometry(QtCore.QRect(210, 20, 491, 31))
        self.ln_addressbar.setObjectName(_fromUtf8("ln_addressbar"))

        self.ln_addressbar.editingFinished.connec(self.OnEditingFinished)
        self.tb_search = QtGui.QToolButton(self.centralwidget)
        self.tb_search.setGeometry(QtCore.QRect(710, 20, 41, 31))
        icon4 = QtGui.QIcon()
        icon4.addPixmap(QtGui.QPixmap(_fromUtf8(":/icons/icons/search.png")), QtGui.QIcon.Normal, QtGui.QIcon.Off)
        self.tb_search.setIcon(icon4)
        self.tb_search.setIconSize(QtCore.QSize(32, 32))
        self.tb_search.setObjectName(_fromUtf8("tb_search"))
        self.webView = QtWebKit.QWebView(self.centralwidget)
        self.webView.setGeometry(QtCore.QRect(0, 60, 1261, 591))
        self.webView.setUrl(QtCore.QUrl(_fromUtf8("about:blank")))
        self.webView.setObjectName(_fromUtf8("webView"))
        MainWindow.setCentralWidget(self.centralwidget)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        MainWindow.setWindowTitle(_translate("MainWindow", "Neel\'s Web Browser", None))
        self.tb_back.setText(_translate("MainWindow", "...", None))
        self.tb_reload.setText(_translate("MainWindow", "...", None))
        self.tb_forword_2.setText(_translate("MainWindow", "...", None))
        self.tb_home.setText(_translate("MainWindow", "...", None))
        self.tb_search.setText(_translate("MainWindow", "...", None))

    def OnEditingFinished(self):
        self.webView.setUrl(QtCore.QUrl("http://"+self.ln_addressbar.text()))

from PyQt4 import QtWebKit


if __name__ == "__main__":
    import sys
    app = QtGui.QApplication(sys.argv)
    MainWindow = QtGui.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())