下面的代码运行，但是永远不会为我显示按钮。 我只想要一个简单的按钮说退出

Question

I am trying to learn GUI on PyQt5 (which I have downloaded) and I want to create a button. After looking at a decent amount of articles the problem still persists.

import sys
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
from PyQt5.QtGui import *


class Window(QMainWindow):

    def __init__(self):
        super(Window,self).__init__()
        self.setGeometry(700,250,700,500)
        self.setWindowTitle("Hang-Man")
        self.show()

    def home(self):
        btn1 = QPushButton('Quit', self)
        btn1.move(20,200)
        self.show()

Answer 1

Well, I don't know what is your home method, but the right way to do that is to define your UI widgets in the initUI method, like that:

import sys

from PyQt5.QtWidgets import QApplication
from PyQt5.QtWidgets import QPushButton
from PyQt5.QtWidgets import QWidget


class App(QWidget):

    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        self.setGeometry(700, 250, 700, 500)
        self.setWindowTitle("Hang-Man")

        btn1 = QPushButton('Quit', self)
        btn1.move(20, 200)
        btn1.clicked.connect(self.close)

        self.show()


if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = App()
    sys.exit(app.exec_())

Here, the "clicked" handler is connected to the close method, to close the application.