[Bug]: MessageBoxBase accepted and rejected signal triggered twice

[Sug2077]

What happened?

Operation System

Windows 10 22H2

Python Version

3.11.9 64bit

PyQt/PySide Version

Pyside6 6.7.2

PyQt/PySide-Fluent-Widgets Version

1.5.7

How to Reproduce?

code copy from examples/dialog_flyout/custom_message_box/demo.py

Minimum code

# coding:utf-8
import sys

from PySide6.QtCore import Qt, QUrl
from PySide6.QtGui import QIcon
from PySide6.QtWidgets import QApplication, QWidget, QHBoxLayout

from qfluentwidgets import MessageBoxBase, SubtitleLabel, LineEdit, PushButton, setTheme, Theme

class CustomMessageBox(MessageBoxBase):
    """ Custom message box """

    def __init__(self, parent=None):
        super().__init__(parent)
        self.titleLabel = SubtitleLabel('打开 URL', self)
        self.urlLineEdit = LineEdit(self)

        self.urlLineEdit.setPlaceholderText('输入文件、流或者播放列表的 URL')
        self.urlLineEdit.setClearButtonEnabled(True)

        # add widget to view layout
        self.viewLayout.addWidget(self.titleLabel)
        self.viewLayout.addWidget(self.urlLineEdit)

        # change the text of button
        self.yesButton.setText('打开')
        self.cancelButton.setText('取消')

        self.widget.setMinimumWidth(350)
        self.yesButton.setDisabled(True)
        self.urlLineEdit.textChanged.connect(self._validateUrl)

        # self.hideYesButton()

    def _validateUrl(self, text):
        self.yesButton.setEnabled(QUrl(text).isValid())

class Demo(QWidget):

    def __init__(self):
        super().__init__()
        # setTheme(Theme.DARK)
        # self.setStyleSheet('Demo{background:rgb(32,32,32)}')

        self.hBxoLayout = QHBoxLayout(self)
        self.button = PushButton('打开 URL', self)

        self.resize(600, 600)
        self.hBxoLayout.addWidget(self.button, 0, Qt.AlignCenter)
        self.button.clicked.connect(self.showDialog)

    def showDialog(self):
        w = CustomMessageBox(self)
        w.rejected.connect(lambda: print("rejected"))
        if w.exec():
            print(w.urlLineEdit.text())

if __name__ == '__main__':
    app = QApplication(sys.argv)
    w = Demo()
    w.show()
    app.exec()