获取标签中的字符串值，然后解析为整数，pyqt4

Question

我试图从我创建并解析的标签中获取一个字符串值，或者将它转换成一个整数，这样我就可以在标签的值上加上+1，然后再将其设置回标签中。例：如果标签上写着“4”，按一个按钮来增加它就会显示“5”。谢谢！在

    self.lblCam1Focus = QtGui.QLabel("4",self)
    self.lblCam1Focus.move(50,60)



        def cam1IncreaseFocus(self):
            text = self.lblCam1Focus.text
            n = text
            n = n + 1
            self.lblCam1Focus.setText(n)

Answer 1

TypeError: QLabel.setText(QString): argument 1 has unexpected type 'int'

明确声明传递的参数是unexpected type。所以接下来您应该考虑的是，什么类型对QString重要

A Python string or unicode object, a QLatin1String or a QChar may be used whenever a QString is expected.

来自http://pyqt.sourceforge.net/Docs/PyQt4/qstring.html

所以

def cam1IncreaseFocus(self):
    num_text = self.lblCam1Focus.text()
    num = int(num_text) + 1
    self.lblCam1Focus.setText(str(num))