PyQt使用类显示按钮

from PyQt5.QtWidgets import QApplication, QMainWindow, QPushButton

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

    def initUI(self):
        self.setWindowTitle("PyQt Button Example")
        self.setGeometry(100, 100, 300, 200)

        button = QPushButton("Click me", self)
        button.setGeometry(100, 100, 100, 30)
        button.clicked.connect(self.buttonClicked)

    def buttonClicked(self):
        print("Button clicked!")

if __name__ == "__main__":
    app = QApplication([])
    window = MyWindow()
    window.show()
    app.exec_()