PyQt5 – QDoubleSpinBox

QDoubleSpinBox 允许用户通过单击向上和向下按钮或通过按键盘上的向上或向下键来增加或减少当前显示的值来选择一个值。用户也可以手动输入值。旋转框支持双精度值，但可以扩展为使用不同的字符串。下面是双旋转框的样子

例子 ：
一个带有 Double Spinbox 和标签的窗口，当值更改时，标签中将出现一条消息，显示当前值。

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, 500, 400)
  
        # calling method
        self.UiComponents()
  
        # showing all the widgets
        self.show()
  
    # method for components
    def UiComponents(self):
  
        # creating double spin box
        d_spin = QDoubleSpinBox(self)
  
        # setting geometry to the double spin box
        d_spin.setGeometry(100, 100, 150, 40)
  
        # adding action to the double spin box
        d_spin.valueChanged.connect(lambda:  spin_method())
  
        # creating a label
        label = QLabel("GeeksforGeeks", self)
  
        # setting geometry to the label
        label.setGeometry(100, 200, 300, 80)
  
        # making label multi line
        label.setWordWrap(True)
  
        def spin_method():
  
            # getting current value of double spin box
            value = d_spin.value()
  
            # setting text to the label
            label.setText("Current Value : " + 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 ：