PyQt5 QSpinBox – 检查值是否在中心

在本文中，我们将看到如何检查值是否出现在旋转框的中心，当我们创建旋转框时，值在左侧为了使值在中心，我们必须设置它的对齐方式标志居中。

为了做到这一点，我们将使用alignment方法。

Syntax : spin_box.alignment()

Argument : It takes no argument

Return : It returns Qt object

实施步骤——

1.创建一个旋转框
2. 借助setAlignment方法设置其对齐方式
3.创建标签以显示结果
4. 借助alignment方法获取对齐
5.检查对齐是否居中然后更新标签
6. 显示对齐不居中 显示不在居中

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, 150, 40)
  
        # alignment
        alignment = Qt.AlignCenter
  
        # setting alignment to centre
        self.spin.setAlignment(alignment)
  
        # creating label
        label = QLabel(self)
  
        # setting geometry to the label
        label.setGeometry(100, 160, 200, 30)
  
        # getting alignment
        get_alignment = self.spin.alignment()
  
        # checking if alignment is centre
        if get_alignment == Qt.AlignCenter:
            text = "Center Aligned"
  
        else:
            text = "Not center aligned"
  
        # setting text to the label
        label.setText(text)
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())

输出 ：