PyQt5 QSpinBox – 设置上边距

在本文中，我们将了解如何设置或更改旋转框的上边距，默认情况下，旋转框没有边距设置，即上边距值为零。虽然我们可以改变这一点，但设置微调框的边距不会在微调框中显示任何更改，因为小部件会进行覆盖以保持其结构。但是为了给旋转框设置边距，我们已经为旋转框的行编辑对象设置了边距，通过它我们可以在旋转框中显示边距。

In order to do this we use setTop method

Syntax : margin.setTop(n)
Here margin is the QMargin object of the QLineEdit object which belongs to spin box

Argument : It take integer as argument

Return : It returns None

编程需要懂一点英语

实施步骤：
1.创建一个旋转框
2.获取旋转框的行编辑对象
3.从spin box中获取margin对象
4. 设置旋转框的上边距
5.将此边距对象添加回行编辑对象

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 range to the spin box
        self.spin.setRange(0, 999999)
  
        # setting prefix to spin
        self.spin.setPrefix("Prefix ")
  
        # setting suffix to spin
        self.spin.setSuffix(" Suffix")
  
        # getting line edit object
        line_edit = self.spin.lineEdit()
  
        # getting margins
        margin = line_edit.contentsMargins()
  
        # setting top margin
        margin.setTop(30)
  
        # setting this margin back to line edit
        line_edit.setContentsMargins(margin)
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
window.spin.setFocus()
# start the app
sys.exit(App.exec())

输出：