PyQt5 – 复选框的 isTristate() 方法

当我们在 PyQt5 应用程序中创建复选框时，默认情况下它只有两种状态，即 True 和 False，但在setTristate方法的帮助下。 isTristate方法用于检查复选框是有两个状态还是三个状态，如果复选框有三个状态则返回 True，否则返回 False。

Syntax : checkbox.isTristate()

Argument : It takes no argument.

Return : It return bool, True if it is tri-state else False.

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('Check Box', self)
  
        # setting geometry of check box
        checkbox.setGeometry(200, 150, 100, 30)
  
        # creating the third state
        checkbox.setTristate(True)
  
        # getting if check bos is tri-state
        check = checkbox.isTristate()
  
        # printing the check
        print(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 ：

True