标签颜色和文本更改

Question

我想要的是PyQt5标签（电源按钮状态）中的GUI根据物理按钮（开/关按钮-表示电源状态）的位置进行相应更新

问题是。。。代码在我看来很好，但当我运行时，它只运行一次。。。。它会根据按钮位置相应地显示颜色和文本，但之后程序会关闭

这是我的节目

希望你能帮我一把

from PyQt5 import QtWidgets
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
import sys, time

import RPi.GPIO as GPIO

GPIO.setwarnings(False)

GPIO.setmode(GPIO.BCM)

powerButton = 1  # button position in RPi - gpio1
GPIO.setup(powerButton, GPIO.IN)


class MyWindow(QDialog):
    def __init__(self):
        super().__init__()

        self.setGeometry(200, 200, 300, 300)
        self.setWindowTitle("On/Off Color variation")

        self.InitUi()
        self.show()

    def InitUi(self):
        self.label = QtWidgets.QLabel(self)
        if GPIO.input(powerButton) == GPIO.HIGH:
            self.label.setText("Power On")
            self.label.setStyleSheet("background-color: lightgreen")
        elif GPIO.input(powerButton) == GPIO.LOW:
            self.label.setText("Power Off")
            self.label.setStyleSheet("background-color: red")

        self.powerStatus = powerStatusThread()
        self.powerStatus.start()


class powerStatusThread(QThread):
    def run(self):
        while True:
            if GPIO.input(powerButton) == GPIO.HIGH:
                print("Button ON")
                self.label.setText("Power On")
                self.label.setStyleSheet("background-color: lightgreen")
                self.label.update()
            elif GPIO.input(powerButton) == GPIO.LOW:
                print("BUTTON OFF")
                self.label.setText("Power Off")
                self.label.setStyleSheet("background-color: red")
                self.label.update()
            time.sleep(2)


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