如何在PyQt5中更改鼠标单击时的图标

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QPushButton, QVBoxLayout
from PyQt5.QtGui import QIcon, QMouseEvent

class ClickableButton(QPushButton):
    def __init__(self, icon_path, parent=None):
        super().__init__(parent)
        self.default_icon = QIcon(icon_path)
        self.clicked_icon = QIcon('path_to_clicked_icon.png')  # 替换为你的点击后图标路径
        self.setIcon(self.default_icon)

    def mousePressEvent(self, event: QMouseEvent):
        if event.button() == 1:  # 左键点击
            self.setIcon(self.clicked_icon)
        super().mousePressEvent(event)

    def mouseReleaseEvent(self, event: QMouseEvent):
        if event.button() == 1:  # 左键释放
            self.setIcon(self.default_icon)
        super().mouseReleaseEvent(event)

class MyApp(QWidget):
    def __init__(self):
        super().__init__()
        layout = QVBoxLayout()
        self.button = ClickableButton('path_to_default_icon.png', self)  # 替换为你的默认图标路径
        layout.addWidget(self.button)
        self.setLayout(layout)

if __name__ == '__main__':
    app = QApplication(sys.argv)
    window = MyApp()
    window.show()
    sys.exit(app.exec_())