11-QObject定时器-案例.py

import sys

from PyQt5.Qt import *


class MyObject(QObject):
    def timerEvent(self, evt):
        print(evt, "1")


class MyLabel(QLabel):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.setText("10")
        self.move(200, 200)
        self.setStyleSheet("font-size: 25px;")

    def set_sec(self, sec):
        self.setText(str(sec))

    def start_my_timer(self, ms):
        self.timer_id = self.startTimer(ms)

    def timerEvent(self, *args, **kwargs):
        # print('XXX')
        # 1.获取标签内容
        current_sec = int(self.text())
        current_sec -= 1
        self.setText(str(current_sec))

        if current_sec == 0:
            print("停止")
            self.killTimer(self.timer_id)


# 1. 创建一个应用程序对象
app = QApplication(sys.argv)

# 2.控件的操作
# 2.1创建控件
window = QWidget()
# 2.2设置控件

window.setWindowTitle("QObject定时器案例")
window.resize(500, 500)
window.move(400, 250)

label = MyLabel(window)
label.set_sec(5)
label.start_my_timer(500)

# 2.3展示控件
window.show()

# 3.应用程序的执行， 进入到消息循环
sys.exit(app.exec_())