import threading

from PySide6.QtWidgets import QApplication, QMainWindow, QPushButton, QMessageBox
from PySide6.QtCore import QThread, Signal, QObject

class Worker:
    # 定义一个类属性的信号

    def __init__(self):
        self.task_done_signal = Signal(str)
    def run_task(self):
        import time
        time.sleep(2)  # 模拟耗时操作
        # 发送信号
        self.task_done_signal.emit("子线程任务完成！")


class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("子线程信号示例")
        self.setGeometry(200, 200, 400, 300)

        # 添加按钮
        self.button = QPushButton("启动子线程", self)
        self.button.setGeometry(100, 100, 200, 50)
        self.button.clicked.connect(self.run_task)

        # 创建子线程和工作者对象
        self.worker_thread = threading.Thread(target=self.run_task)
        self.worker = Worker()

        # 连接信号和槽
        self.worker.task_done_signal.connect(self.show_message)

    def run_task(self):
        # 启动子线程
        self.worker_thread.start()

    def show_message(self, message):
        # 显示来自子线程的消息
        QMessageBox.information(self, "任务完成", message)

        # 停止子线程
        self.worker_thread.quit()
        self.worker_thread.wait()

if __name__ == "__main__":
    app = QApplication([])

    window = MainWindow()
    window.show()

    app.exec()