from PyQt5.QtWidgets import QApplication,QWidget,QProgressBar,QPushButton
from PyQt5.QtCore import QBasicTimer
from PyQt5.QtGui import QIcon
import sys
 
class Example(QWidget):
  def __init__(self):
    super().__init__()
    self.initUI() # 顯示窗體內(nèi)容
  def initUI(self):
    self.pbar = QProgressBar(self)
    self.pbar.setGeometry(30, 50, 200, 25) #設(shè)置進(jìn)度條位置及大小
    self.btn = QPushButton('開始', self)
    self.btn.move(50, 90)
    self.btn.clicked.connect(self.doAction) #點(diǎn)擊按鈕時(shí)執(zhí)行的動(dòng)作函數(shù)指定為self.doAction()
    # self.btn.setGeometry(50, 90, 40, 25)
 
    self.timer = QBasicTimer() #構(gòu)建一個(gè)計(jì)數(shù)器
    self.step = 0 #設(shè)置基數(shù)
    self.setGeometry(300, 300, 280, 170) # 設(shè)置整個(gè)窗體的大小
    self.setWindowTitle('進(jìn)度條') #設(shè)置窗口標(biāo)題
    # self.setWindowIcon('logo2.png') #設(shè)置窗口圖標(biāo)
    self.show()
 
  def timerEvent(self, *args, **kwargs):
    if self.step >= 100:
      self.timer.stop()
      self.btn.setText('完成')
      return
    self.step += 1
    self.pbar.setValue(self.step) #timer每次重圍時(shí)將self.step 賦值給pbar
 
 
  def doAction(self):
    if self.timer.isActive():
      self.timer.stop()
      self.btn.setText('開始')
    else:
      self.timer.start(100, self)
      self.btn.setText('停止')
 
if __name__ == '__main__':
  app = QApplication(sys.argv) # 創(chuàng)建一個(gè)QT應(yīng)用對(duì)象
  ex = Example()
  sys.exit(app.exec_())