PyQt5 QDoubleSpinBox – 获取最大可能值

在本文中，我们将了解如何为 QDoubleSpinBox 获取最大可能值。默认情况下，双旋转框的最大可能值为 <100。即用户不能输入大于或等于 100 的值，尽管我们可以随时在setMaximum方法的帮助下更改此最大值。通过更改最大值，我们允许用户输入小于最大值的值。

In order to do this we will use maximum method with the double spin box object.

Syntax : dd_spin.maximum()

Argument : It takes no argument

Return : It returns float

编程需要懂一点英语

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)
  
        # setting decimal precision
        d_spin.setDecimals(1)
  
        # step type
        step_type = QAbstractSpinBox.AdaptiveDecimalStepType
  
        # adaptive step type
        d_spin.setStepType(step_type)
  
        # setting maximum value
        d_spin.setMaximum(9.9)
          
        # 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)
  
        # getting maximum value
        value = d_spin.maximum()
  
        # setting text to the label
        label.setText("Max Possible 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：