在 pyqt 的启动画面中使用 gif答案

【问题标题】：Using a gif in Splash Screen in pyqt在 pyqt 的启动画面中使用 gif
【发布时间】：2014-03-15 12:25:45
【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..

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_()

但是我只得到了 gif 的第一帧...我该如何克服这个...？

【问题讨论】：

这可能会有所帮助。他们使用 QLabel 和 QMovie。 stackoverflow.com/questions/10261265/…
@wbt11a 该链接用于在应用程序中显示 .gif .. 但我想将该 .gif 添加到启动画面，我无法将 QLabel 或 QMovie 添加到启动画面屏幕
@Srinath。使用QPixmap 动画 gif 根本不起作用 - 它只能显示静态内容，这就是为什么您只能看到第一帧的原因。因此，您要么必须循环显示一系列图像，要么使用可以显示动态内容的小部件，例如QMovie。

标签： python user-interface pyqt4 splash-screen

【解决方案1】：

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_()

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。

【讨论】：

几个问题：“把你的初始化代码放在这里”是什么意思？什么类型的代码会去那里？另外，我的动画在程序打开之前冻结了几秒钟，有什么想法吗？谢谢！
@MikeBourbeau 也一样

【解决方案2】：

翻译成PySide：

from PySide import QtCore
from PySide import QtGui

from multiprocessing import Pool

class Form(QtGui.QDialog):

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

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


    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 = QtGui.QApplication(sys.argv)

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

    # this event loop is needed for dispatching of Qt events
    initLoop = QtCore.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_()

【讨论】：