PyQt5 QSpinBox - 清除文本

在本文中，我们将看到如何清除文本，即旋转框的值，清除并不意味着重置值意味着恢复原始值，清除值/文本意味着完全擦除旋转框的内容。

为此，我们将使用clear()方法。

Syntax : spin_box.clear()

Argument : It takes no argument

Return : It returns None

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)
  
        # creating a push button
        button = QPushButton("Click", self)
  
        # setting geometry to the button
        button.setGeometry(200, 200, 100, 40)
  
        # adding action ot the push button
        button.pressed.connect(self.do_something)
  
    # action called by the button
    def do_something(self):
  
        # clearing the spin box
        self.spin.clear()
  
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())

输出：