PyQt5 QSpinBox 小部件

QSpinBox是一个 PyQt5 小部件，它为用户提供一个文本框，该文本框在其右侧显示一个带有向上/向下按钮的整数。如果按下向上/向下按钮，文本框中的值会增加/减少。默认最小值为 0，最大值为 99。

例子 ：
带有 Spinbox 的窗口，当值更改时，将出现一条消息，显示当前值。

Steps for implementation –

1. Create main window class
2. Create a spin box widget
3. Create a label to show the value
4. Add action to the spin box such that when value is changed action should get called
5. Inside the action set value to the label

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, 100, 40)
  
        # adding action to the spin box
        self.spin.valueChanged.connect(self.show_result)
  
        # creating label show result
        self.label = QLabel(self)
  
        # setting geometry
        self.label.setGeometry(100, 200, 200, 40)
  
    # method called by spin box
    def show_result(self):
  
        # setting value of spin box to the label
        self.label.setText("Value : " + str(self.spin.value()))
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
window.show()
  
# start the app
sys.exit(App.exec())

输出 ：