pyqt6实现关闭窗口前弹出确认框的示例代码

QMessageBox.question(parent: Optional[QWidget], 
	title: Optional[str], 
	text: Optional[str], 
	buttons: QMessageBox.StandardButton = QMessageBox.StandardButtons(QMessageBox.Yes|QMessageBox.No), 
	defaultButton: QMessageBox.StandardButton = QMessageBox.NoButton) 
-> QMessageBox.StandardButton

class StandardButton(enum.IntFlag):
    NoButton = ... # type: QMessageBox.StandardButton
    Ok = ... # type: QMessageBox.StandardButton
    Save = ... # type: QMessageBox.StandardButton
    SaveAll = ... # type: QMessageBox.StandardButton
    Open = ... # type: QMessageBox.StandardButton
    Yes = ... # type: QMessageBox.StandardButton
    YesToAll = ... # type: QMessageBox.StandardButton
    No = ... # type: QMessageBox.StandardButton
    NoToAll = ... # type: QMessageBox.StandardButton
    Abort = ... # type: QMessageBox.StandardButton
    Retry = ... # type: QMessageBox.StandardButton
    Ignore = ... # type: QMessageBox.StandardButton
    Close = ... # type: QMessageBox.StandardButton
    Cancel = ... # type: QMessageBox.StandardButton
    Discard = ... # type: QMessageBox.StandardButton
    Help = ... # type: QMessageBox.StandardButton
    Apply = ... # type: QMessageBox.StandardButton
    Reset = ... # type: QMessageBox.StandardButton
    RestoreDefaults = ... # type: QMessageBox.StandardButton
    FirstButton = ... # type: QMessageBox.StandardButton
    LastButton = ... # type: QMessageBox.StandardButton
    YesAll = ... # type: QMessageBox.StandardButton
    NoAll = ... # type: QMessageBox.StandardButton
    Default = ... # type: QMessageBox.StandardButton
    Escape = ... # type: QMessageBox.StandardButton
    FlagMask = ... # type: QMessageBox.StandardButton
    ButtonMask = ... # type: QMessageBox.StandardButton

def closeEvent(self, event):
    """
    处理窗口关闭事件。

    参数：
        event (QCloseEvent) -- 关闭事件对象，包含了与关闭事件相关的信息。

    返回值：
        无返回值。如果需要阻止窗口关闭，可以返回 True;否则返回 False。
    """

import sys

from PyQt6.QtGui import QCloseEvent
from PyQt6.QtWidgets import QApplication, QWidget, QMessageBox


class ConfirmQuitWindow(QWidget):
    def __init__(self, is_confirm_quit: bool = True):
        super(ConfirmQuitWindow, self).__init__()
        self.is_confirm_quit = is_confirm_quit
        self.setGeometry(0, 0, 500, 300)
        self.setWindowTitle('提示是否关闭窗口测试')

    def closeEvent(self, event: QCloseEvent) -> None:
        if self.is_confirm_quit:
            reply = QMessageBox.question(self, '关闭窗口', '确定退出吗?',
                                         QMessageBox.StandardButton.Yes | QMessageBox.StandardButton.No,
                                         QMessageBox.StandardButton.No)
            if reply == QMessageBox.StandardButton.Yes:
                event.accept()
            else:
                event.ignore()
        else:
            event.accept()


app = QApplication(sys.argv)

window = ConfirmQuitWindow(is_confirm_quit=True)
window.show()

sys.exit(app.exec())