定时器
from PyQt5.Qt import * import sys class obj(QObject): def timerEvent(self, a0: 'QTimerEvent') -> None: print(QTimerEvent,2) if __name__=='__main__': app=QApplication(sys.argv) win = QWidget() l1 = QLabel(win) l1.move(100,200) obj1 =obj() time_id = obj1.startTimer(1000) l1.setText(str(time_id)) obj1.killTimer(time_id) #终止定时器 win.show() sys.exit(app.exec_()) 信号和槽