PyQt5 QSpinBox - 获取发送者信号索引值

在本文中，我们将了解如何获取旋转框发送器信号索引值。发送者信号索引是调用当前执行槽的信号的元方法索引，它是发送者返回的类的成员。如果在由信号激活的槽之外调用，则返回 -1。

为了做到这一点，我们将senderSignalIndex方法与旋转框对象一起使用。

Syntax : spin_box.senderSignalIndex()

Argument : It takes no argument

Return : It returns integer value

下面是实现

# importing libraries
from PyQt5.QtWidgets import * 
from PyQt5 import QtCore, QtGui
from PyQt5.QtGui import * 
from PyQt5.QtCore import * 
import sys
  
  
class Window(QMainWindow):
  
    def __init__(self):
        super().__init__()
  
        # setting title
        self.setWindowTitle("Python ")
  
        # setting geometry
        self.setGeometry(100, 100, 600, 400)
  
        # calling method
        self.UiComponents()
  
        # showing all the widgets
        self.show()
  
        # method for widgets
    def UiComponents(self):
        # creating spin box
        self.spin = QSpinBox(self)
  
        # setting geometry to spin box
        self.spin.setGeometry(100, 100, 250, 40)
  
        # setting range to the spin box
        self.spin.setRange(1, 999999)
  
        # setting prefix to spin
        self.spin.setPrefix("PREFIX ")
  
        # setting suffix to spin
        self.spin.setSuffix(" SUFFIX")
  
        # creating a label
        self.label = QLabel(self)
  
        # making label multi line
        self.label.setWordWrap(True)
  
        # setting label geometry
        self.label.setGeometry(100, 200, 250, 60)
  
        # getting sender signal index
        value = self.spin.senderSignalIndex()
  
        # setting text to the label
        self.label.setText("Sender Signal Index : " + str(value))
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())

输出 ：