📜  PyQt5 QSpinBox – 访问前缀

📅  最后修改于: 2022-05-13 01:55:39.835000             🧑  作者: Mango

PyQt5 QSpinBox – 访问前缀

在本文中,我们将了解如何访问微调框的前缀,前缀基本上是插入在微调框值之前的文本,前缀对于微调框的每个值都保持不变,即不可编辑。默认情况下,旋转框没有设置前缀,我们使用 setPrefix 方法设置前缀。为了访问前缀,我们将使用前缀方法。

实现步骤: 1. 创建旋转框 2. 为旋转框添加前缀 3. 创建标签以显示前缀 4. 借助前缀方法访问前缀 5. 使用 setText 方法在标签中显示前缀 下面是实现

Python3
# 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)
 
        # adding prefix in combo box
        self.spin.setPrefix("Value of x : ")
 
        # creating label to show the prefix
        label = QLabel(self)
 
        # setting geometry of label
        label.setGeometry(100, 160, 200, 30)
 
        # getting prefix of spin box
        text = self.spin.prefix()
 
        # showing prefix through label
        label.setText("Prefix = \" " + 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 :