在 pyqt 的启动画面中使用 gif [英] Using a gif in Splash Screen in pyqt

问题描述

我是使用 pyqt 进行 gui 设计的新手.我想在启动画面中使用 gif.. 使用此代码..

I am new to gui designing with pyqt.. I want to use a gif in the splash screen.. using this code..

from PyQt4.QtCore import *
from PyQt4.QtGui import *


class Form(QDialog):

    def __init__(self, parent=None):
        super(Form, self).__init__(parent)
        self.browser = QTextBrowser()
        self.setWindowTitle('Just a dialog')

if __name__ == "__main__":
    import sys, time

    app = QApplication(sys.argv)

    # Create and display the splash screen
    splash_pix = QPixmap('a.gif')
    splash = QSplashScreen(splash_pix, Qt.WindowStaysOnTopHint)
    splash.setMask(splash_pix.mask())
    #splash.raise_() 
    splash.show()
    app.processEvents()

    # Simulate something that takes time
    time.sleep(2)

    form = Form()
    form.show()
    splash.finish(form)
    app.exec_()

但我只得到了 gif 的第一帧...我该如何克服这个问题...?

But i am getting only the first frame of the gif...How do i overcome this...?

推荐答案

这是我得到的:

#!/usr/bin/env python2
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from multiprocessing import Pool

class Form(QDialog):

    def __init__(self, parent=None):
        super(Form, self).__init__(parent)
        self.browser = QTextBrowser()
        self.setWindowTitle('Just a dialog')

class MySplashScreen(QSplashScreen):
    def __init__(self, animation, flags):
        # run event dispatching in another thread
        QSplashScreen.__init__(self, QPixmap(), flags)
        self.movie = QMovie(animation)
        self.connect(self.movie, SIGNAL('frameChanged(int)'), SLOT('onNextFrame()'))
        self.movie.start()

    @pyqtSlot()
    def onNextFrame(self):
        pixmap = self.movie.currentPixmap()
        self.setPixmap(pixmap)
        self.setMask(pixmap.mask())

# Put your initialization code here
def longInitialization(arg):
    time.sleep(arg)
    return 0
if __name__ == "__main__":
    import sys, time

    app = QApplication(sys.argv)

    # Create and display the splash screen
#   splash_pix = QPixmap('a.gif')
    splash = MySplashScreen('a.gif', Qt.WindowStaysOnTopHint)
#   splash.setMask(splash_pix.mask())
    #splash.raise_()
    splash.show()
    app.processEvents()

    # this event loop is needed for dispatching of Qt events
    initLoop = QEventLoop()
    pool = Pool(processes=1)
    pool.apply_async(longInitialization, [2], callback=lambda exitCode: initLoop.exit(exitCode))
    initLoop.exec_()

    form = Form()
    form.show()
    splash.finish(form)
    app.exec_()

请注意，您需要在单独的线程中运行初始化代码，因为主线程应该调度 Qt 事件.

Note, that you need to run your initialization code in a separate thread, since the main thread should dispatch Qt events.

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