在python3中实现更新界面

from PyQt5.QtCore import QThread , pyqtSignal, QDateTime , QObject
from PyQt5.QtWidgets import QApplication, QDialog, QLineEdit
import time
import sys
 
class BackendThread(QObject):
 # 通过类成员对象定义信号
 update_date = pyqtSignal(str)
 
 # 处理业务逻辑
 def run(self):
  while True:
   data = QDateTime.currentDateTime()
   currTime = data.toString("yyyy-MM-dd hh:mm:ss")
   self.update_date.emit( str(currTime) )
   time.sleep(1)
 
class Window(QDialog):
 def __init__(self):
  QDialog.__init__(self)
  self.setWindowTitle('PyQt 5界面实时更新例子')
  self.resize(400, 100)
  self.input = QLineEdit(self)
  self.input.resize(400, 100)
  self.initUI()
 
 def initUI(self):
  # 创建线程
  self.backend = BackendThread()
  # 连接信号
  self.backend.update_date.connect(self.handleDisplay)
  self.thread = QThread()
  self.backend.moveToThread(self.thread)
  # 开始线程
  self.thread.started.connect(self.backend.run)
  self.thread.start()
 
 # 将当前时间输出到文本框
 def handleDisplay(self, data):
  self.input.setText(data)
 
if __name__ == '__main__':
 app = QApplication(sys.argv)
 win = Window()
 win.show() 
 sys.exit(app.exec_())

from time import sleep

from selenium import webdriver

driver= webdriver.Chrome() # 需要 下载 对应浏览器 驱动到 python 安装目录
driver.get("https://blog.csdn.net/qq_27061049/article/details/90577597") # 刷新网址

for i in range(10000): # 刷新次数
 driver.refresh() # 刷新网页
 sleep(5) # 五秒一次

# -*- coding: utf-8 -*-

import sys

from PyQt5.QtWebEngineWidgets import QWebEngineView
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *


class WebView(QWebEngineView):
 def __init__(self):
  super(WebView, self).__init__()
  url = 'https://blog.csdn.net/qq_27061049/article/details/89711766' # 自定义刷新的网页
  self.load(QUrl(url))
  self.showMinimized() #窗口最小化
  self.show()
  self.thread = Worker() # 创建线程实例
  self.thread.sinOut.connect(self.reloadWeb) # 信号绑定槽函数
  self.thread.start() # 开启线程

 def reloadWeb(self):
  self.reload() #刷新网页

class Worker(QThread):
 sinOut = pyqtSignal() # 创建新的信号，并且有参数
 num = 0
 def __init__(self, parent=None): # 构造方法 创建号对象之后，会自动调用
  super(Worker, self).__init__(parent)


 def __del__(self): # 析构函数 再对象被删除 和 回收的时候调用
  self.wait()

 def run(self):
  for i in range(1000):
   # 发出信号
   self.sinOut.emit() # 给信号传参字符串，并发送
   # 线程休眠66秒
   self.sleep(66)
   Worker.num = Worker.num + 1
   print (str(Worker.num) + " 次刷新")

if __name__ == '__main__':
 app = QApplication(sys.argv)
 web = WebView()
 print('### exec succeed !')
 sys.exit(app.exec_())