pyqt中的初始屏幕

Question

我想修改我的代碼以在登錄對話框顯示前添加啓動屏幕（大約2秒） .i嘗試了一些東西（更改爲註釋），但不工作。請向我展示如何修改我的代碼。

import sys 
    from time import * 
    from PyQt4 import QtGui,QtCore 
    from loginD import * 
    from mainwindow import Ui_MainWindow 

class Login(QtGui.QDialog): 
#A dialog with username and password lineedit 
    def __init__(self,parent=None): 
    QtGui.QDialog.__init__(self,parent) 
    self.ui=Ui_LoginD() 
    self.ui.setupUi(self) 
    self.ui.PasswordLE.setEchoMode(QtGui.QLineEdit.Password) 
    QtCore.QObject.connect(self.ui.LoginPB,QtCore.SIGNAL('clicked()'), 
          self.HandleLogin) 
def HandleLogin(self): 
    if self.ui.PasswordLE.text()=="pass": 
     self.accept() 

    else: 
     QtGui.QMessageBox.warning(
      self,'Error;','bad') 

class Main_Window(QtGui.QMainWindow,): 
#main window ui 
def __init__(self,parent=None): 
    QtGui.QWidget.__init__(self,parent) 
    self.ui=Ui_MainWindow() 
    self.ui.setupUi(self) 



if __name__=='__main__': 
app=QtGui.QApplication(sys.argv) 
#splash_pix=QtGui.QPixmap('logo and typeface blue.jpg') 
#splash=QtGui.QSplashScreen(splash_pix,QtCore.Qt.WindowStaysOnTopHint) 
#splash.show() 
# app.processEvents() 
#time.sleep(2) 
if Login().exec_()==QtGui.QDialog.Accepted: 
    window=Main_Window() 
    window.show() 
    sys.exit(app.exec_()) 

Answer 1

使用一個定時器啓動登錄過程：

if __name__ == '__main__': 

    app = QtGui.QApplication(sys.argv) 

    splash_pix = QtGui.QPixmap('logo and typeface blue.jpg') 
    splash = QtGui.QSplashScreen(splash_pix, QtCore.Qt.WindowStaysOnTopHint) 
    splash.show() 

    def login(): 
     splash.close() 
     if Login().exec_() == QtGui.QDialog.Accepted: 
      global window 
      window = Main_Window() 
      window.show() 
     else: 
      app.quit() 

    QtCore.QTimer.singleShot(2000, login) 

    sys.exit(app.exec_())