from PyQt5.QtCore import QThread , pyqtSignal, QDateTime , QObject
from PyQt5.QtWidgets import QApplication, QDialog, QLineEdit
import time
import sys
class BackendThread(QObject):
# 通過類成員對象定義信號
update_date = pyqtSignal(str)
# 處理業務邏輯
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界面實時更新例子')
self.resize(400, 100)
self.input = QLineEdit(self)
self.input.resize(400, 100)
self.initUI()
def initUI(self):
# 創建線程
self.backend = BackendThread()
# 連接信號
self.backend.update_date.connect(self.handleDisplay)
self.thread = QThread()
self.backend.moveToThread(self.thread)
# 開始線程
self.thread.started.connect(self.backend.run)
self.thread.start()
# 將當前時間輸出到文本框
def handleDisplay(self, data):
self.input.setText(data)
if __name__ == '__main__':
app = QApplication(sys.argv)
win = Window()
win.show()
sys.exit(app.exec_())