python pyqt5 多线程与信号

-- coding: utf-8 --

""" 【简介】 多线程更新跟新数据，pyqt5界面实时刷新例子

"""

from PyQt5.QtCore import QThread, pyqtSignal, QDateTime from PyQt5.QtWidgets import QApplication, QDialog, QLineEdit import time import sys

class BackendThread(QThread): # 通过类成员对象定义信号对象 update_date = pyqtSignal(str)

# 处理要做的业务逻辑
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('pyqt5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)
    # 开始线程
    self.backend.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_())