PyQt5实现暗黑风格的计时器

import sysfrom PyQt5.QtCore import *from PyQt5.QtGui import *from PyQt5.QtWidgets import *from PyQt5 import QtCoreimport qdarkstyle global secsec = 0  class WorkThread(QThread): trigger = pyqtSignal()  def __int__(self):  super(WorkThread, self).__init__()  def run(self):  for i in range(2000000000):   pass   # 循环完毕后发出信号  self.trigger.emit() def countTime(): global sec sec += 1 # LED显示数字+1 lcdNumber.display(sec)  def work(): # 计时器计时 print("#30") timer.start(1000) # 将start写成statr居然不报错，但是找bug却找了半天 # 计时开始 workThread.start() # 当获得循环完毕的信号时，停止计时 workThread.trigger.connect(timeStop)  def timeStop(): print("#38") timer.stop() print("计时结束，共计用时：", lcdNumber.value()) global sec sec = 0  if __name__ == "__main__": app = QApplication(sys.argv) top = QWidget() top.resize(300, 200) # 影藏边框 top.setWindowFlags(QtCore.Qt.FramelessWindowHint) layout = QVBoxLayout(top) lcdNumber = QLCDNumber() layout.addWidget(lcdNumber) button = QPushButton("开始") layout.addWidget(button)  timer = QTimer() workThread = WorkThread() button.clicked.connect(work) # 计时结束，触发countime timer.timeout.connect(countTime) # 进行渲染 app.setStyleSheet(qdarkstyle.load_stylesheet_pyqt5()) top.show() sys.exit(app.exec_())