如何在PyQt5中停止线程

from PyQt5.QtCore import QThread, pyqtSignal

class MyThread(QThread):
    stopped = pyqtSignal()

    def __init__(self):
        super().__init__()
        self.is_running = True

    def run(self):
        while self.is_running:
            # 执行线程任务
            pass

        self.stopped.emit()

    def stop(self):
        self.is_running = False

# 在主线程中使用示例
import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QPushButton

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.thread = MyThread()
        self.thread.stopped.connect(self.on_thread_stopped)

        button = QPushButton("停止线程", self)
        button.clicked.connect(self.stop_thread)
        self.setCentralWidget(button)

    def stop_thread(self):
        self.thread.stop()

    def on_thread_stopped(self):
        print("线程已停止")

if __name__ == "__main__":
    app = QApplication(sys.argv)
    window = MainWindow()
    window.show()
    sys.exit(app.exec_())