1、类型判定
（1）总体结构
（2）API操作
from PyQt5.Qt import *
class Window(QWidget):
def __init__(self):
super().__init__()
self.setWindowTitle("QObject的学习")
self.resize(500, 500)
self.setup_ui()
def setup_ui(self):
#self.QObject_ceshi()
self.QObject_类型判定()
def QObject_类型判定(self):
# # *********** 测试API**************开始
obj=QObject()
w=QWidget()
btn=QPushButton()
label=QLabel()
objs=[obj,w,btn,label]
for o in objs:
# print(o.isWidgetType())
# print(o.inherits('QWidget'))
print(o.inherits('QPushBotton'))
# *********** 测试API**************结束
if __name__ == '__main__':
import sys
app=QApplication(sys.argv)
window=Window()
window.show()
sys.exit(app.exec_())
（3）案例
from PyQt5.Qt import *
class Window(QWidget):
def __init__(self):
super().__init__()
self.setWindowTitle("QObject的学习")
self.resize(500, 500)
self.setup_ui()
def setup_ui(self):
#self.QObject_ceshi()
self.QObject_类型判定()
def QObject_类型判定(self):
# # *********** 测试API**************开始
# obj=QObject()
# w=QWidget()
# btn=QPushButton()
# label=QLabel()
#
# objs=[obj,w,btn,label]
# for o in objs:
# # print(o.isWidgetType())
# # print(o.inherits('QWidget'))
# print(o.inherits('QPushBotton'))
# *********** 测试API**************结束
# **************案例*****************开始
label = QLabel(self)
label.setText("社会社会社会")
label.move(100, 100)
label2 = QLabel(self)
label2.setText("哈哈哈哈")
label2.move(150, 150)
btn = QPushButton(self)
btn.setText("点我")
btn.move(200, 200)
for widget in self.children():
# print(widget)
if widget.inherits("QLabel"):
# print("是")
widget.setStyleSheet('background-color:green')
# **************案例*****************结束
if __name__ == '__main__':
import sys
app=QApplication(sys.argv)
window=Window()
window.show()
sys.exit(app.exec_())
2、对象删除
（1）总体框架
（2）API操作
from PyQt5.Qt import *
class Window(QWidget):
def __init__(self):
super().__init__()
self.setWindowTitle("QObject的学习")
self.resize(500, 500)
self.setup_ui()
def setup_ui(self):
#self.QObject_ceshi()
self.QObject_对象删除()
def QObject_对象删除(self):
# *********** 测试API**************开始
obj1 = QObject()
self.obj1=obj1
obj2 = QObject()
obj3 = QObject()
obj3.setParent(obj2)
obj2.setParent(obj1)
obj1.destroyed.connect(lambda:print("obj1被释放了"))
obj2.destroyed.connect(lambda: print("obj2被释放了"))
obj3.destroyed.connect(lambda: print("obj3被释放了"))
# del obj2
obj2.deleteLater() # 稍后删除
print(obj1.children()) # 先完成再删除
# *********** 测试API**************结束
if __name__ == '__main__':
import sys
app=QApplication(sys.argv)
window=Window()
window.show()
sys.exit(app.exec_())
