PyQt5 QCalendarWidget – 删除内存引用

在本文中，我们将了解如何删除 QCalendarWidget 的引用。删除日历对象的最后一个Python引用不足以完全清理，因为在 Qt 端仍然可能有一个引用。一般来说，Qt 不会隐式删除对象。因此，如果内存使用是一个问题，可能需要采取措施明确删除它们。

In order to do this we will use deleteLater method with the QCalendarWidget object.
Syntax : calendar.deleteLater()
Argument : It takes no argument
Return : It returns None

编程需要懂一点英语

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 components
    def UiComponents(self):
 
        # creating a QCalendarWidget object
        calendar = QCalendarWidget(self)
 
        # setting geometry to the calendar
        calendar.setGeometry(10, 10, 400, 250)
 
        # deleting the memory reference explicitly
        calendar.deleteLater()
 
        # creating a label
        label = QLabel(self)
 
        # setting geometry to the label
        label.setGeometry(100, 280, 250, 60)
 
        # making label multi line
        label.setWordWrap(True)
 
        # setting text to the label
        label.setText("Calendar is deleted")
 
# create pyqt5 app
App = QApplication(sys.argv)
 
# create the instance of our Window
window = Window()
 
# start the app
sys.exit(App.exec())

输出：