testapp.py 文件源码

def initUI(self):               

        qbtn = QPushButton('Quit', self)
        qbtn.setObjectName ("testApplicationButton")
        qbtn.clicked.connect(QCoreApplication.instance().quit)
        qbtn.resize(qbtn.sizeHint())
        qbtn.move(50, 50)       

        self.setGeometry(300, 300, 250, 150)
        self.setWindowTitle('Quit button')    
        self.show()