Question

我如何在PyQt5中重新加载新的动画gif文件？

我想做什么：

load test.gif
play test.gif
使用另一个任意动画gif
让Qmovie在点击按钮时重新加载gif
显示新的gif

以下是我为尝试此操作而设置的基本代码，但是单击按钮进行刷新不起作用：

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

事实证明这是一个非常简单的解决方案。错误是试图只刷新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，然后启动电影。这是更正后的代码：

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方法主要是需要更改的方法。

PyQt5：在Qmovie中重新加载gif

1 个答案: