import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QPushButton
from PyQt5.QtCore import QObject, QRunnable, pyqtSignal, QThreadPool# 辅助类，用于定义信号
class WorkerSignals(QObject):print('pass signal')finished = pyqtSignal(bool)  # 发射布尔值的信号# 工作线程类
class Worker(QRunnable):def __init__(self):super(Worker, self).__init__()self.signals = WorkerSignals()def run(self):# 这里执行一些工作print('Worker thread is running...')# 模拟长时间运行的任务import timetime.sleep(5)# 工作完成后发射信号self.signals.finished.emit(False)# 主窗口类
class MainApp(QMainWindow):def __init__(self):super(MainApp, self).__init__()self.setWindowTitle('PyQt5 Signal Slot Example')self.initUI()self.threadpool = QThreadPool()def initUI(self):button = QPushButton('Start Thread', self)button.clicked.connect(self.start_thread)self.setFixedSize(200, 100)button.resize(200, 40)def start_thread(self):worker = Worker()worker.signals.finished.connect(self.on_finished)self.threadpool.start(worker)def on_finished(self, result):print(f'Worker thread finished with result: {result}')# 应用程序入口点
def main():app = QApplication(sys.argv)main_app = MainApp()main_app.show()sys.exit(app.exec_())if __name__ == '__main__':main()