从组合框发出信号时将布局插入QDialog

from PyQt5.QtWidgets import QApplication, QDialog, QComboBox, QVBoxLayout, QLabel

class MyDialog(QDialog):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("Dialog")
        
        # 创建组合框
        self.comboBox = QComboBox()
        self.comboBox.addItem("Option 1")
        self.comboBox.addItem("Option 2")
        self.comboBox.addItem("Option 3")
        
        # 连接信号和槽函数
        self.comboBox.activated.connect(self.insertLayout)
        
        # 创建布局
        self.layout = QVBoxLayout()
        self.setLayout(self.layout)
        
        # 将组合框添加到布局中
        self.layout.addWidget(self.comboBox)
        
    def insertLayout(self):
        # 清空布局中的所有控件
        for i in range(self.layout.count()):
            self.layout.itemAt(i).widget().deleteLater()
        
        # 根据选择的选项创建并插入布局
        selectedOption = self.comboBox.currentText()
        if selectedOption == "Option 1":
            label = QLabel("Option 1 selected")
            self.layout.addWidget(label)
        elif selectedOption == "Option 2":
            label = QLabel("Option 2 selected")
            self.layout.addWidget(label)
        elif selectedOption == "Option 3":
            label = QLabel("Option 3 selected")
            self.layout.addWidget(label)

# 创建应用程序和对话框实例
app = QApplication([])
dialog = MyDialog()
dialog.show()
app.exec()