PyQt5 QSpinBox – 检查文本是否为粗体？

在本文中，我们将看到如何检查旋转框的文本是否为粗体，以便使用以 QFont 对象为参数的 setFont 方法设置字体。为了使文本（即字体）变为粗体，我们必须获取旋转框的 QFont 对象，然后将其变为粗体，然后将其重新分配给旋转框。

为了获得关于字体的信息，我们必须获得旋转框的 QFontInfo 对象，这可以使用fontInfo方法来完成。

In order to do this we bold method with the QFontInfo object of the spin box

Syntax : font_info.bold()

Argument : It takes no argument

Return : It returns bool

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 font of the spin box
        font = self.spin.font()
          
        # making font bold
        font.setBold(True)
          
        # reassigning the font to the spin box
        self.spin.setFont(font)
  
        # creating a label
        label = QLabel(self)
  
        # setting geometry to the label
        label.setGeometry(100, 200, 300, 60)
  
        # getting the font info
        font_info = self.spin.fontInfo()
  
        # getting bold status of text
        check = font_info.bold()
  
        # setting text to the label
        label.setText("Bold ? : " + str(check))
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())

输出 ：