Pyqt 浏览器禁止对话框小demo

恩，有些时候需要让程序自动化控制浏览器，其中遇到一个问题就是，如何禁止浏览器弹框？

能否自动确定？或者压根就不让它弹框呢？

在怎样自动关闭JS的 alert对话框 帖子中找到解决方法，核心代码：

#浏览器        
class MyBrowser(QWebView):
    def __init__(self):
        QWebView.__init__(self)
        self.webpage = QWebPage(self)
        self.setPage(self.webpage)
        self.url = 'http://jiaowu.dlufl.edu.cn/'
        self.webpage.javaScriptAlert =  self._javascript_alert  #重载 alert函数
        self.load(QtCore.QUrl(self.url))
        QtCore.QObject.connect(self,QtCore.SIGNAL('loadFinished(bool)'),self.do_loadFinished)   
        
        
    #重写js alert，让它自动确定
    def _javascript_alert(self, webframe, message):
        return
    

完成效果，怎么点登录都不会弹框：

如果我们注释掉：

#self.webpage.javaScriptAlert =  self._javascript_alert  #重载 alert函数

那么：

全部代码：

# #coding:utf-8  
from PyQt4 import QtGui
from PyQt4 import QtCore
from PyQt4.QtWebKit import*
from PyQt4 import QtCore, QtGui
from PyQt4 import uic
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from PyQt4.QtWebKit import *
from PyQt4.QtNetwork import *
import sys
from IPython import embed

reload(sys)
sys.setdefaultencoding('utf-8')

#解决QString中文乱码
QTextCodec.setCodecForCStrings(QTextCodec.codecForName("utf-8"))

#控制台
class MyConsole(QWidget):
    def __init__(self,parent):
        QWidget.__init__(self)
        self.parent = parent
        
        self.initUI()
        
    #初始化UI    
    def initUI(self):
        self.gridlayout = QtGui.QGridLayout()
         
        #设置出20 x 20 的格局
        for i in range(20):
            self.gridlayout.setColumnStretch(i,1)
            self.gridlayout.setRowStretch(i,1)

        lb1 = QLabel(u'账户：')
        lb2 = QLabel(u'密码：')
        self.userEntry = QLineEdit()
        self.passEntry = QLineEdit()
        self.passEntry.setEchoMode(QLineEdit.Password)
        self.loginBtn = QtGui.QPushButton(u"登录")
        self.loginBtn.setFixedSize(40,20)
        self.connect(self.loginBtn, QtCore.SIGNAL('clicked()'), self.onLoginButton)
        
        self.gridlayout.addWidget(lb1, 0, 0)
        self.gridlayout.addWidget(lb2, 1, 0)
        self.gridlayout.addWidget(self.userEntry, 0, 1,1,3)
        self.gridlayout.addWidget(self.passEntry, 1, 1,1,3)
        self.gridlayout.addWidget(self.loginBtn, 0, 4,1,2)
        
        self.setLayout(self.gridlayout)   
  
    #响应登录按钮
    def onLoginButton(self):
        username = self.userEntry.text()
        password = self.passEntry.text()
        QtGui.QMessageBox.about(self, username+u'登录成功', u"密码是："+password)
        tmpstr = username+u'登录成功！\n' + u"密码是："+password
        print str(tmpstr).decode('utf-8')

#浏览器        
class MyBrowser(QWebView):
    def __init__(self):
        QWebView.__init__(self)
        self.webpage = QWebPage(self)
        self.setPage(self.webpage)
        self.url = 'http://jiaowu.dlufl.edu.cn/'
        self.webpage.javaScriptAlert =  self._javascript_alert  #重载 alert函数
        self.load(QtCore.QUrl(self.url))
        QtCore.QObject.connect(self,QtCore.SIGNAL('loadFinished(bool)'),self.do_loadFinished)   
        
        
    #重写js alert，让它自动确定
    def _javascript_alert(self, webframe, message):
        return
    
       
    #页面加载完成的处理函数
    def do_loadFinished(self):       
        frame = self.page().currentFrame()
        doc = self.page().currentFrame().documentElement()
        #打印网页title
        print 'Page load..',str(frame.title()).decode('utf-8'),"##"
        
        
 
class MainWindow(QtGui.QMainWindow):
    def __init__(self,parent=None):
        QtGui.QMainWindow.__init__(self, parent)

        tabs = QtGui.QTabWidget(self)

        #tab1
        tab1 = QtGui.QWidget() 
        vBox1 = QtGui.QVBoxLayout()
        console = MyConsole(self)
        vBox1.addWidget(console)
        tab1.setLayout(vBox1)
        
        #tab2
        tab2 = QtGui.QWidget()
        web = MyBrowser() 
        
        vBox2 = QtGui.QVBoxLayout()
        vBox2.addWidget(web)
        tab2.setLayout(vBox2)
        
        tabs.addTab(tab1,u"控制台")
        tabs.addTab(tab2,u"浏览器")
        
        tabs.resize(500, 350)
        self.resize(500, 350)
        
        #禁止最大化
        self.setWindowFlags(QtCore.Qt.WindowMinimizeButtonHint)  
        self.show()

def main():
    app = QtGui.QApplication(sys.argv)
    app.connect( app, SIGNAL( "lastWindowClosed()" ), app.quit);
    win = MainWindow()
    sys.exit(app.exec_())
 
if __name__ == '__main__':
    main()