PyQt属性错误：尝试发射整型信号

Question

这可能是我的一个愚蠢的错误；当我尝试实现此线程代码以更新PyQt5 gui的进度条级别时，出现以下错误：

Traceback (most recent call last):
  File "threadtest.py", line 62, in <module>
    app=MainWindow()
  File "threadtest.py", line 35, in __init__
    self.threadclass = ThreadClass()
  File "threadtest.py", line 49, in __init__
    self.getLevels()
  File "threadtest.py", line 53, in getLevels
    self.battery.emit()
AttributeError: 'int' object has no attribute 'emit'
[1:1:0100/000000.677780:ERROR:broker_posix.cc(43)] Invalid node channel message

代码是：

class MainWindow(QtWidgets.QMainWindow, gs.Ui_MainWindow):
    def __init__(self, parent = None):
        super(MainWindow, self).__init__(parent = parent)

        self.setupUi(self)
        self.threadclass = ThreadClass()
        self.threadclass.start()
        self.threadclass.battery.connect(self.updateLevels)

    def updateLevels(self, val):
        self.battery1bar.setValue(val)    

class ThreadClass(QtCore.QThread):
    battery = pyqtSignal(int)
    def __init__(self, parent = None):
        super(ThreadClass, self).__init__(parent = parent)

        self.getLevels()

    def getLevels(self):
        self.battery=7
        self.battery.emit()

gs.Ui\u MainWindow.setupUi是从qt designer自动生成的Ui。getLevels最终将动态检索电池电量

Answer 1

由于正在为信号赋值，因此将其隐藏：

self.battery = 7

必须将该值作为参数传递给emit()：

def getLevels(self):
    self.battery.emit(7)