Python 添加启动屏幕后PyQt4应用程序崩溃

我正在尝试将splashscreen添加到我的PyQt4 GUI应用程序中。代码工作正常，直到我关闭应用程序，使Python崩溃，并显示“Python.exe已停止工作”。这是密码

if __name__ == "__main__":
    app = QtGui.QApplication(sys.argv)

    #Splashscreen
    movie = QMovie("giphy-downsized.gif")
    splash = MovieSplashScreen(movie)
    splash.show()

    start = time.time()

    while movie.state() == QMovie.Running and time.time() < start + 10:
        app.processEvents()


    MainWindow = QtGui.QMainWindow()
    splash.finish(MainWindow)
    movie.stop()

    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    splash.close()
    sys.exit(app.exec_())

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请阅读python回溯——它清楚地说明了问题所在。（注：今后，请不要发布控制台输出的图像。始终将实际文本复制并粘贴到您的问题中）。什么是MovieSplashScreen？您可以显示完整的代码这是MovieSplashScreen类。完整的代码超过700行。

class MovieSplashScreen(QSplashScreen):

def __init__(self, movie, parent = None):

    movie.jumpToFrame(0)
    pixmap = QPixmap(movie.frameRect().size())

    QSplashScreen.__init__(self, pixmap)
    self.movie = movie
    self.movie.frameChanged.connect(self.repaint)

def showEvent(self, event):
    self.movie.start()

def hideEvent(self, event):
    self.movie.stop()

def paintEvent(self, event):

    painter = QPainter(self)
    pixmap = self.movie.currentPixmap()
    self.setMask(pixmap.mask())
    painter.drawPixmap(0, 0, pixmap)

def sizeHint(self):

    return self.movie.scaledSize()