PyQt5:在Qmovie中重新加载gif

Question

我将如何在 PyQt5 中重新加载新的动画 gif 文件？

我想做什么：

1. 负载测试.gif
2. 游戏测试.gif
3. 用另一个任意动画 GIF 覆盖原始 test.gif 文件
4. 点击按钮时让Qmovie重新加载gif
5. 显示新的 GIF

这是我为尝试此操作而设置的基本代码，但是单击按钮刷新不起作用：

import sys
from PyQt5.QtCore import Qt, QByteArray, QSettings, QTimer, pyqtSlot
from PyQt5.QtWidgets import QWidget, QApplication, QLabel, QSizePolicy, QVBoxLayout, QAction, QPushButton
from PyQt5.QtGui import QMovie
class GifPlayer(QWidget):
def __init__(self, title, parent=None):
QWidget.__init__(self, parent)
self.movie = QMovie("test.gif", QByteArray(), self)
size = self.movie.scaledSize()
self.setGeometry(200, 200, size.width(), size.height())
self.setWindowTitle(title)
self.movie_screen = QLabel()
self.movie_screen.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
self.movie_screen.setAlignment(Qt.AlignCenter)        
main_layout = QVBoxLayout()
main_layout.addWidget(self.movie_screen)
self.setLayout(main_layout)
self.movie.setCacheMode(QMovie.CacheAll)
self.movie_screen.setMovie(self.movie)
self.movie.start()
self.movie.loopCount()
button = QPushButton('refresh gif', self)
button.setToolTip('This is an example button')
button.move(10,10)
button.clicked.connect(self.on_click)
@pyqtSlot()
def on_click(self):
self.movie_screen.setMovie(self.movie)
print("done")     
if __name__ == "__main__":  
app = QApplication(sys.argv)
player = GifPlayer("update this gif")
player.show()
sys.exit(app.exec_())

Answer 1

事实证明，这是一个从根本上简单的解决方案。错误是试图刷新movie_screen而不是电影本身。只需再次设置 QMovie 文件，让movie_screen重新显示它，然后开始电影。以下是更正后的代码：

gifFile = "test.gif"
class GifPlayer(QWidget):
def __init__(self, title, gifFile, parent=None):
QWidget.__init__(self, parent)
self.movie = QMovie(gifFile, QByteArray(), self)
size = self.movie.scaledSize()
self.setGeometry(200, 200, size.width(), size.height())
self.setWindowTitle(title)
self.movie_screen = QLabel()
self.movie_screen.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
self.movie_screen.setAlignment(Qt.AlignCenter)
main_layout = QVBoxLayout()
main_layout.addWidget(self.movie_screen)
self.setLayout(main_layout)
self.movie.setCacheMode(QMovie.CacheAll)
self.movie_screen.setMovie(self.movie)
self.movie.start()
self.movie.loopCount()
button = QPushButton('refresh gif', self)
button.setToolTip('This is an example button')
button.move(10,10)
button.clicked.connect(self.on_click)
@pyqtSlot()
def on_click(self):
self.movie = QMovie(gifFile,QByteArray(), self)
self.movie_screen.setMovie(self.movie)
self.movie.start()
print("done")
if __name__ == "__main__":
app = QApplication(sys.argv)
player = GifPlayer("update this gif", gifFile)
player.show()
sys.exit(app.exec_())

on_click方法主要是需要改变的。