在PyQT中单击按钮后的Msg_box

from PyQt5.QtWidgets import QApplication, QWidget, QMessageBox, QPushButton
import sys

class MyWindow(QWidget):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        self.setGeometry(300, 300, 300, 200)
        self.setWindowTitle('Button Example')

        button = QPushButton('Click me', self)
        button.clicked.connect(self.showMessageBox)

    def showMessageBox(self):
        QMessageBox.information(self, 'Message', 'Button clicked!')

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