Pyqt QApplication.processEvents() 防止頁面鎖死

def autoSubmitCloseOrder(self):
    if self.ib is not None:
        second = 0
        while True:
            QApplication.processEvents()
            self.ib.sleep(0.1)
            second += 1
            if second % 10 == 0:
                print(datetime.datetime.now())

用QApplication.processEvents()，可以用在while 裏，還是會去執行UI，不會導致頁面鎖死
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