PyQt5 QSpinBox – 启用它

在本文中，我们将看到如何根据用户启用旋转框，禁用的旋转框基本上是无法编辑的旋转框，即禁用和启用的旋转框是正常的旋转框，默认情况下旋转框是启用的.为了使旋转框禁用，我们使用setDisabled方法。

为此，我们使用setEnabled方法。

Syntax : spin_box.setEnabled(bool)

Argument : It takes bool as argument

Return : It returns None

实施步骤：
1.创建一个旋转框
2.创建一个按钮并向按钮添加动作
3.在动作里面禁用旋转框
4. 创建另一个按钮并向其添加操作
5.在动作里面启用旋转框

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 prefix to spin
        self.spin.setPrefix("Prefix ")
  
        # setting suffix to spin
        self.spin.setSuffix(" Suffix")
  
        # setting range to spin
        self.spin.setRange(0, 99999)
  
        # creating push button
        button = QPushButton("Disable", self)
  
        # setting button geometry
        button.setGeometry(100, 160, 100, 40)
  
        # adding action to the push button
        button.clicked.connect(self.push_method)
  
        # creating push button
        e_button = QPushButton("Enable", self)
  
        # setting button geometry
        e_button.setGeometry(220, 160, 100, 40)
  
        # adding action to the push button
        e_button.clicked.connect(self.another_method)
  
    # method called by push button
    def push_method(self):
  
        # making spin box disabled
        self.spin.setDisabled(True)
  
    # method called by e_button
    def another_method(self):
  
        # making spin box enabled
        self.spin.setEnabled(True)
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())

输出 ：