思路:主线程创建UI,将主线程的UI槽函数传给子线程,当子线程工作完成之后,发出信号,通知主线程的UI槽函数
代码:
import sys
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
import time
# 为窗口类添加信号
class BackendThread(QThread):
update_date = pyqtSignal(str)
def run(self):
while True:
data = QDateTime.currentDateTime()
currentTime = data.toString("yyyy-MM-dd hh:mm:ss")
self.update_date.emit(str(currentTime))
time.sleep(1)
# 主线程
class ThreadUpdateUI(QDialog):
def __init__(self):
QDialog.__init__(self)
self.setWindowTitle("多线程更新UI数据")
self.resize(400,100)
self.input = QLineEdit(self)
# 绝对布局
self.input.resize(400,100)
self.initUI()
def initUI(self):
self.backend = BackendThread()
self.backend.update_date.connect(self.handleDisplay)
# 启动线程
self.backend.start()
def handleDisplay(self,data):
self.input.setText(data)
if __name__ == '__main__':
app = QApplication(sys.argv)
example = ThreadUpdateUI()
example.show()
sys.exit(app.exec_())