QWebView不会显示网页

Question

我最近在PyCharm中使用PyQt4创建了一个Web浏览器，当我运行程序时，我的Web浏览器弹出，然后我键入：

http://www.google.com

但是，屏幕仍然是白色的。

下面是代码：

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_())

为了解决这个问题，我尝试了

www.google.com

然而，问题依然存在。

如果这有帮助，我在 PyCharm 社区应用程序中运行了这段代码。

Answer 1

问题是，即使您放置了 url，QWebView也不知道您已经放置了它，为此您必须使用信号(在本例中为 editingFinished ，当您按回车键或返回键时执行(，另一个问题是您需要添加前缀：http://

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

完整代码：

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_())