demo：直接重写 closeEvent 方法
def closeEvent(self, event): print("老刘关闭的操作") result=QMessageBox.question(self,"注意：","您真的要关闭窗体吗？",QMessageBox.Yes|QMessageBox.No,QMessageBox.No) if result==QMessageBox.Yes: event.accept() else: event.ignore() QMessageBox.information(self,"消息","谢谢！")
