PyQt5 – 复选框的 setCheckState() 方法

当我们创建一个复选框时，它只有选中和未选中两种状态，尽管我们可以使用setTristate方法添加一个中间状态。我们可以使用setChecked将复选框设置为选中或取消选中，但使用此方法我们无法将复选框设置为中间状态。

setCheckState方法用于设置复选框的状态，它可以选中或取消选中，甚至可以设置中间状态，它以 CheckState 对象为参数。

Syntax : checkbox.setCheckState(1)

Argument : It takes CheckState object as argument.

Action performed:
If we pass 0 to it, it set un-checked state to check box
If we pass 1 to it, it set intermediate state to check box
If we pass any other integer to it, it set checked state to check box

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 the check-box
        checkbox = QCheckBox('Geek ?', self)
  
        # setting geometry of check box
        checkbox.setGeometry(200, 150, 100, 40)
  
        # making check box as tristate
        checkbox.setTristate(True)
  
        # setting check box state
        checkbox.setCheckState(1)
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())

输出 ：