PyQt5 QObject 对象删除

'''
        deleteLater()  # 在代码执行完之后删除对象
'''
################################
# PyQt5中文网 - PyQt5全套视频教程 #
#    https://www.PyQt5.cn/     #
#         主讲： 村长            #
################################
 
from PyQt5.Qt import *
import sys
 
class Window(QWidget):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("对象删除")
        self.resize(600,500)
        self.func_list()
 
    def func_list(self):
        self.func()
 
 
    def func(self):
        obj1 = QObject()
        self.obj1 = obj1
        obj2 = QObject()
        obj3 = QObject()
        obj2.setParent(obj1)
        obj3.setParent(obj2)
        print(obj1)
        print(obj2)
        print(obj3)
 
        obj1.destroyed.connect(lambda :print('obj1被释放'))
        obj2.destroyed.connect(lambda :print('obj2被释放'))
        obj3.destroyed.connect(lambda :print('obj3被释放'))
 
        # del obj2
        print(obj2.deleteLater())
        print(obj1.children())
 
        # 案例
        label1 = QLabel(self)
        label1.setText('label1')
        label1.move(50,50)
        label1.setStyleSheet('background-color:green')
 
        label2 = QLabel(self)
        label2.setText('label2')
        label2.move(100,100)
        label2.setStyleSheet('background-color:green')
 
        label3 = QLabel(self)
        label3.setText('label3')
        label3.move(150,150)
        label3.setStyleSheet('background-color:green')
 
        # label2.deleteLater()
        del label2
 
if __name__ == '__main__':
    app = QApplication(sys.argv)
    window = Window()
 
    window.show()
    sys.exit(app.exec_())

 

'''

        deleteLater()  # 在代码执行完之后删除对象

'''

################################

# PyQt5中文网 - PyQt5全套视频教程 #

#    https://www.PyQt5.cn/     #

#         主讲： 村长            #

################################

 

from PyQt5.Qt import *

import sys

 

class Window(QWidget):

    def __init__(self):

        super().__init__()

        self.setWindowTitle("对象删除")

        self.resize(600,500)

        self.func_list()

 

    def func_list(self):

        self.func()

 

 

    def func(self):

        obj1 = QObject()

        self.obj1 = obj1

        obj2 = QObject()

        obj3 = QObject()

        obj2.setParent(obj1)

        obj3.setParent(obj2)

        print(obj1)

        print(obj2)

        print(obj3)

 

        obj1.destroyed.connect(lambda :print('obj1被释放'))

        obj2.destroyed.connect(lambda :print('obj2被释放'))

        obj3.destroyed.connect(lambda :print('obj3被释放'))

 

        # del obj2

        print(obj2.deleteLater())

        print(obj1.children())

 

        # 案例

        label1 = QLabel(self)

        label1.setText('label1')

        label1.move(50,50)

        label1.setStyleSheet('background-color:green')

 

        label2 = QLabel(self)

        label2.setText('label2')

        label2.move(100,100)

        label2.setStyleSheet('background-color:green')

 

        label3 = QLabel(self)

        label3.setText('label3')

        label3.move(150,150)

        label3.setStyleSheet('background-color:green')

 

        # label2.deleteLater()

        del label2

 

if __name__ == '__main__':

    app = QApplication(sys.argv)

    window = Window()

 

    window.show()

    sys.exit(app.exec_())