在PyQt中使用QThread的后台线程

import sys
from PyQt5.QtCore import QThread, pyqtSignal
from PyQt5.QtWidgets import QApplication, QMainWindow, QPushButton, QVBoxLayout, QWidget

class WorkerThread(QThread):
    finished = pyqtSignal(str)

    def run(self):
        # 模拟耗时任务
        import time
        time.sleep(5)
        self.finished.emit("任务完成！")

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("QThread 示例")
        self.setGeometry(100, 100, 300, 200)

        self.button = QPushButton("开始任务")
        self.button.clicked.connect(self.start_task)

        layout = QVBoxLayout()
        layout.addWidget(self.button)

        container = QWidget()
        container.setLayout(layout)
        self.setCentralWidget(container)

        self.worker_thread = WorkerThread()
        self.worker_thread.finished.connect(self.on_task_finished)

    def start_task(self):
        self.button.setEnabled(False)
        self.worker_thread.start()

    def on_task_finished(self, message):
        self.button.setEnabled(True)
        print(message)

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

self.worker_thread.quit()
self.worker_thread.wait()