pyqt6实现QTimer定时器介绍和使用场景

from PyQt6.QtCore import QTimer

QTimer()

timer = QTimer()

timer.setInterval(1000)  # 设置为1000毫秒(1秒)

def on_timeout():
    print("定时器超时")

timer.timeout.connect(on_timeout)

timer.start()

timer.stop()

from PyQt6.QtWidgets import QApplication, QLabel, QVBoxLayout, QWidget
from PyQt6.QtCore import QTimer
import sys


class MyApp(QWidget):
    def __init__(self):
        super().__init__()
        self.label = QLabel("Hello, World!")
        layout = QVBoxLayout()
        layout.addWidget(self.label)
        self.setLayout(layout)

        self.timer = QTimer()
        self.timer.timeout.connect(self.update_text)
        self.timer.start(1000)  # 每隔1秒触发一次timeout信号
        self.cnt = 1

    def update_text(self):
        self.label.setText(f"Hello, PyQt6! cnt:{self.cnt}")
        self.cnt = self.cnt + 1


app = QApplication(sys.argv)
window = MyApp()
window.show()
sys.exit(app.exec())

import sys
from PyQt6.QtWidgets import QApplication, QWidget, QMessageBox
from PyQt6.QtCore import QTimer


class Example(QWidget):
    def __init__(self):
        super().__init__()
        self.setGeometry(300, 300, 250, 150)
        self.setWindowTitle('QTimer')
        self.show()

        # 创建一个QTimer对象
        self.timer = QTimer()
        # 将timeout信号连接到自定义的槽函数
        self.timer.timeout.connect(self.on_timeout)
        # 设置定时器的时间间隔为10000毫秒(10秒)
        self.timer.setInterval(10000)
        self.timer.start()

    def on_timeout(self):
        # 当定时器超时时，显示一个消息框
        QMessageBox.information(self, 'Timeout', '10秒已过！')
        self.timer.stop()


if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec())