这段代码的pushButton_2 为什么触发不了线程 class Worker(QtCore.QThread): sinOut = pyqtSignal(str) def __init__(self, parent=None): super(Worker, self).__init__(parent) # 设置工作状态与初始num数值 self.working = True self.num = 0 #def __del__(self): # 线程状态改变与线程终止 #self.working = False #self.wait() def stop(self): #线程状态改变与线程终止 self.working = False self.wait() def run(self): self.working = True while self.working == True: #file_str = 'File index{0}'.format(self.num) self.num += 1 # 发射信号 #self.sinOut.emit(file_str) self.sinOut.emit('1') # 线程休眠2秒 self.msleep(5) class parentWindow(QMainWindow): def __init__(self): QMainWindow.__init__(self) self.main_ui = JQ.Ui_MainWindow() self.main_ui.setupUi(self) self.thread1 = Worker() self.main_ui.pushButton_2.clicked.connect(self.thing1) self.thread1.sinOut.connect(self.printt) def thing1(self): #self.main_ui.pushButton.setEnabled(False) print('9999999999') self.thread1.start() print('123') #self.sleep(2) def printt(self): print('7777') def ok(): print('ok') # def hourstest(): # thread1 = Worker() # thread1.start() # com = JQ.Ui_MainWindow().comboBox_2.currentText() # ser = serial.Serial('com3', 1200, timeout=1) # data = bytes.fromhex( # '68 01 00 20 00 00 00 00 00 34 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 33 F4 16 ') # ser.write(data) if __name__ == "__main__": app = QtWidgets.QApplication(sys.argv) widget = QtWidgets.QMainWindow() widget = parentWindow() ui = JQ.Ui_MainWindow() # 这是原py中的类,因人而异哦 ui.setupUi(widget) ui.discoverSerial() #串口发现 #ui.pushButton_2.clicked.connect(widget.thing1) widget.show() sys.exit(app.exec_())

在你的代码中，`pushButton_2` 被连接到了 `thing1` 函数，而 `thing1` 函数中又启动了 `thread1` 线程。但是，在 `thing1` 函数中，你没有设置任何条件来等待线程结束，而是直接执行下一条语句，即打印 `123`。因此，在 `thing1` 函数执行完 `print('123')` 后，主线程就会继续往下执行，而 `thread1` 线程也会继续执行，导致你看不到 `printt` 函数的输出。

为了让主线程等待 `thread1` 线程执行完毕后再继续执行，你可以在 `thing1` 函数中加入 `thread1.wait()` 语句，这样主线程就会等待 `thread1` 线程执行完毕后再继续执行。修改后的代码如下：

class parentWindow(QMainWindow):
    def __init__(self):
        QMainWindow.__init__(self)
        self.main_ui = JQ.Ui_MainWindow()
        self.main_ui.setupUi(self)
        self.thread1 = Worker()
        self.main_ui.pushButton_2.clicked.connect(self.thing1)
        self.thread1.sinOut.connect(self.printt)

    def thing1(self):
        print('9999999999')
        self.thread1.start()
        self.thread1.wait()  # 等待 thread1 线程执行完毕
        print('123')

    def printt(self):
        print('7777')

这样，当你点击 `pushButton_2` 触发 `thing1` 函数时，主线程会等待 `thread1` 线程执行完毕后再继续执行，你就可以看到 `printt` 函数的输出了。