调整对话框大小时PyQt5调用函数

import sys
from PyQt5.QtWidgets import QApplication, QDialog, QVBoxLayout, QLabel
from PyQt5.QtCore import Qt

class MyDialog(QDialog):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("调整对话框大小示例")
        self.layout = QVBoxLayout()
        self.label = QLabel("初始文本")
        self.layout.addWidget(self.label)
        self.setLayout(self.layout)

    def resizeEvent(self, event):
        # 在这里编写对话框大小调整时要执行的代码
        self.label.setText("对话框大小已调整")
        event.accept()

if __name__ == '__main__':
    app = QApplication(sys.argv)
    dialog = MyDialog()
    dialog.show()
    sys.exit(app.exec_())