我在 Windows 10 上的 Python 3.9.6 x64 上使用 PyQt6 6.1.0，我想知道如何自定义 QMessageBox 的标题栏。
在我的项目中，一切都是深色主题，我已经使用QStyleSheet自定义了所有可以被QStyleSheet主题化的东西，除了标题栏和QScrollArea，它们与主题不一致。
我已经设法通过使用.setPalette()方法来设置 QScrollArea 的样式，并在这里找到了一种自定义窗口标题栏的方法：https ://stackoverflow.com/a/57571299/16383578 ，但到目前为止我还没有找到任何关于自定义的信息QMessageBox 的标题栏。
我想要的很简单，改变标题栏的字体大小、字体、字体颜色、背景颜色和关闭按钮。
我已经设法使用样式表自定义 QMessageBox 的内容，但是我找不到自定义标题栏的方法，我无法使用样式表来修改它，也无法使用 QPalette 来修改它，因为没有不是标题栏的颜色角色，谷歌搜索数小时无济于事......
但是我找到了一个 QStyle 类并使用我编写的函数递归地列出它的属性，我发现了这个：
<class path="PyQt6.QtWidgets.QStyle">
<attr name="alignedRect"/>
<attr name="childEvent"/>
<attr name="combinedLayoutSpacing"/>
<attr name="connectNotify"/>
<attr name="customEvent"/>
<attr name="disconnectNotify"/>
<attr name="drawComplexControl"/>
<attr name="drawControl"/>
<attr name="drawItemPixmap"/>
<attr name="drawItemText"/>
<attr name="drawPrimitive"/>
<attr name="generatedIconPixmap"/>
<attr name="hitTestComplexControl"/>
<attr name="isSignalConnected"/>
<attr name="itemPixmapRect"/>
<attr name="itemTextRect"/>
<attr name="layoutSpacing"/>
<attr name="name"/>
<attr name="pixelMetric"/>
<attr name="polish"/>
<attr name="proxy"/>
<attr name="receivers"/>
<attr name="sender"/>
<attr name="senderSignalIndex"/>
<attr name="sizeFromContents"/>
<attr name="sliderPositionFromValue"/>
<attr name="sliderValueFromPosition"/>
<attr name="standardIcon"/>
<attr name="standardPalette"/>
<attr name="standardPixmap"/>
<attr name="styleHint"/>
<attr name="subControlRect"/>
<attr name="subElementRect"/>
<attr name="timerEvent"/>
<attr name="unpolish"/>
<attr name="visualAlignment"/>
<attr name="visualPos"/>
<attr name="visualRect"/>
<class path="PyQt6.QtWidgets.QStyle.ComplexControl">
<attr name="CC_SpinBox"/>
<attr name="CC_ComboBox"/>
<attr name="CC_ScrollBar"/>
<attr name="CC_Slider"/>
<attr name="CC_ToolButton"/>
<attr name="CC_TitleBar"/>
<attr name="CC_Dial"/>
<attr name="CC_GroupBox"/>
<attr name="CC_MdiControls"/>
<attr name="CC_CustomBase"/>
</class>
<class path="PyQt6.QtWidgets.QStyle.ContentsType">
<attr name="CT_PushButton"/>
<attr name="CT_CheckBox"/>
<attr name="CT_RadioButton"/>
<attr name="CT_ToolButton"/>
<attr name="CT_ComboBox"/>
<attr name="CT_Splitter"/>
<attr name="CT_ProgressBar"/>
<attr name="CT_MenuItem"/>
<attr name="CT_MenuBarItem"/>
<attr name="CT_MenuBar"/>
<attr name="CT_Menu"/>
<attr name="CT_TabBarTab"/>
<attr name="CT_Slider"/>
<attr name="CT_ScrollBar"/>
<attr name="CT_LineEdit"/>
<attr name="CT_SpinBox"/>
<attr name="CT_SizeGrip"/>
<attr name="CT_TabWidget"/>
<attr name="CT_DialogButtons"/>
<attr name="CT_HeaderSection"/>
<attr name="CT_GroupBox"/>
<attr name="CT_MdiControls"/>
<attr name="CT_ItemViewItem"/>
<attr name="CT_CustomBase"/>
</class>
<class path="PyQt6.QtWidgets.QStyle.ControlElement">
<attr name="CE_PushButton"/>
<attr name="CE_PushButtonBevel"/>
<attr name="CE_PushButtonLabel"/>
<attr name="CE_CheckBox"/>
<attr name="CE_CheckBoxLabel"/>
<attr name="CE_RadioButton"/>
<attr name="CE_RadioButtonLabel"/>
<attr name="CE_TabBarTab"/>
<attr name="CE_TabBarTabShape"/>
<attr name="CE_TabBarTabLabel"/>
<attr name="CE_ProgressBar"/>
<attr name="CE_ProgressBarGroove"/>
<attr name="CE_ProgressBarContents"/>
<attr name="CE_ProgressBarLabel"/>
<attr name="CE_MenuItem"/>
<attr name="CE_MenuScroller"/>
<attr name="CE_MenuVMargin"/>
<attr name="CE_MenuHMargin"/>
<attr name="CE_MenuTearoff"/>
<attr name="CE_MenuEmptyArea"/>
<attr name="CE_MenuBarItem"/>
<attr name="CE_MenuBarEmptyArea"/>
<attr name="CE_ToolButtonLabel"/>
<attr name="CE_Header"/>
<attr name="CE_HeaderSection"/>
<attr name="CE_HeaderLabel"/>
<attr name="CE_ToolBoxTab"/>
<attr name="CE_SizeGrip"/>
<attr name="CE_Splitter"/>
<attr name="CE_RubberBand"/>
<attr name="CE_DockWidgetTitle"/>
<attr name="CE_ScrollBarAddLine"/>
<attr name="CE_ScrollBarSubLine"/>
<attr name="CE_ScrollBarAddPage"/>
<attr name="CE_ScrollBarSubPage"/>
<attr name="CE_ScrollBarSlider"/>
<attr name="CE_ScrollBarFirst"/>
<attr name="CE_ScrollBarLast"/>
<attr name="CE_FocusFrame"/>
<attr name="CE_ComboBoxLabel"/>
<attr name="CE_ToolBar"/>
<attr name="CE_ToolBoxTabShape"/>
<attr name="CE_ToolBoxTabLabel"/>
<attr name="CE_HeaderEmptyArea"/>
<attr name="CE_ColumnViewGrip"/>
<attr name="CE_ItemViewItem"/>
<attr name="CE_ShapedFrame"/>
<attr name="CE_CustomBase"/>
</class>
<class path="PyQt6.QtWidgets.QStyle.PixelMetric">
<attr name="PM_ButtonMargin"/>
<attr name="PM_ButtonDefaultIndicator"/>
<attr name="PM_MenuButtonIndicator"/>
<attr name="PM_ButtonShiftHorizontal"/>
<attr name="PM_ButtonShiftVertical"/>
<attr name="PM_DefaultFrameWidth"/>
<attr name="PM_SpinBoxFrameWidth"/>
<attr name="PM_ComboBoxFrameWidth"/>
<attr name="PM_MaximumDragDistance"/>
<attr name="PM_ScrollBarExtent"/>
<attr name="PM_ScrollBarSliderMin"/>
<attr name="PM_SliderThickness"/>
<attr name="PM_SliderControlThickness"/>
<attr name="PM_SliderLength"/>
<attr name="PM_SliderTickmarkOffset"/>
<attr name="PM_SliderSpaceAvailable"/>
<attr name="PM_DockWidgetSeparatorExtent"/>
<attr name="PM_DockWidgetHandleExtent"/>
<attr name="PM_DockWidgetFrameWidth"/>
<attr name="PM_TabBarTabOverlap"/>
<attr name="PM_TabBarTabHSpace"/>
<attr name="PM_TabBarTabVSpace"/>
<attr name="PM_TabBarBaseHeight"/>
<attr name="PM_TabBarBaseOverlap"/>
<attr name="PM_ProgressBarChunkWidth"/>
<attr name="PM_SplitterWidth"/>
<attr name="PM_TitleBarHeight"/>
<attr name="PM_MenuScrollerHeight"/>
<attr name="PM_MenuHMargin"/>
<attr name="PM_MenuVMargin"/>
<attr name="PM_MenuPanelWidth"/>
<attr name="PM_MenuTearoffHeight"/>
<attr name="PM_MenuDesktopFrameWidth"/>
<attr name="PM_MenuBarPanelWidth"/>
<attr name="PM_MenuBarItemSpacing"/>
<attr name="PM_MenuBarVMargin"/>
<attr name="PM_MenuBarHMargin"/>
<attr name="PM_IndicatorWidth"/>
<attr name="PM_IndicatorHeight"/>
<attr name="PM_ExclusiveIndicatorWidth"/>
<attr name="PM_ExclusiveIndicatorHeight"/>
<attr name="PM_DialogButtonsSeparator"/>
<attr name="PM_DialogButtonsButtonWidth"/>
<attr name="PM_DialogButtonsButtonHeight"/>
<attr name="PM_MdiSubWindowFrameWidth"/>
<attr name="PM_MdiSubWindowMinimizedWidth"/>
<attr name="PM_HeaderMargin"/>
<attr name="PM_HeaderMarkSize"/>
<attr name="PM_HeaderGripMargin"/>
<attr name="PM_TabBarTabShiftHorizontal"/>
<attr name="PM_TabBarTabShiftVertical"/>
<attr name="PM_TabBarScrollButtonWidth"/>
<attr name="PM_ToolBarFrameWidth"/>
<attr name="PM_ToolBarHandleExtent"/>
<attr name="PM_ToolBarItemSpacing"/>
<attr name="PM_ToolBarItemMargin"/>
<attr name="PM_ToolBarSeparatorExtent"/>
<attr name="PM_ToolBarExtensionExtent"/>
<attr name="PM_SpinBoxSliderHeight"/>
<attr name="PM_ToolBarIconSize"/>
<attr name="PM_ListViewIconSize"/>
<attr name="PM_IconViewIconSize"/>
<attr name="PM_SmallIconSize"/>
<attr name="PM_LargeIconSize"/>
<attr name="PM_FocusFrameVMargin"/>
<attr name="PM_FocusFrameHMargin"/>
<attr name="PM_ToolTipLabelFrameWidth"/>
<attr name="PM_CheckBoxLabelSpacing"/>
<attr name="PM_TabBarIconSize"/>
<attr name="PM_SizeGripSize"/>
<attr name="PM_DockWidgetTitleMargin"/>
<attr name="PM_MessageBoxIconSize"/>
<attr name="PM_ButtonIconSize"/>
<attr name="PM_DockWidgetTitleBarButtonMargin"/>
<attr name="PM_RadioButtonLabelSpacing"/>
<attr name="PM_LayoutLeftMargin"/>
<attr name="PM_LayoutTopMargin"/>
<attr name="PM_LayoutRightMargin"/>
<attr name="PM_LayoutBottomMargin"/>
<attr name="PM_LayoutHorizontalSpacing"/>
<attr name="PM_LayoutVerticalSpacing"/>
<attr name="PM_TabBar_ScrollButtonOverlap"/>
<attr name="PM_TextCursorWidth"/>
<attr name="PM_TabCloseIndicatorWidth"/>
<attr name="PM_TabCloseIndicatorHeight"/>
<attr name="PM_ScrollView_ScrollBarSpacing"/>
<attr name="PM_SubMenuOverlap"/>
<attr name="PM_ScrollView_ScrollBarOverlap"/>
<attr name="PM_TreeViewIndentation"/>
<attr name="PM_HeaderDefaultSectionSizeHorizontal"/>
<attr name="PM_HeaderDefaultSectionSizeVertical"/>
<attr name="PM_TitleBarButtonIconSize"/>
<attr name="PM_TitleBarButtonSize"/>
<attr name="PM_CustomBase"/>
</class>
<class path="PyQt6.QtWidgets.QStyle.PrimitiveElement">
<attr name="PE_Frame"/>
<attr name="PE_FrameDefaultButton"/>
<attr name="PE_FrameDockWidget"/>
<attr name="PE_FrameFocusRect"/>
<attr name="PE_FrameGroupBox"/>
<attr name="PE_FrameLineEdit"/>
<attr name="PE_FrameMenu"/>
<attr name="PE_FrameTabWidget"/>
<attr name="PE_FrameWindow"/>
<attr name="PE_FrameButtonBevel"/>
<attr name="PE_FrameButtonTool"/>
<attr name="PE_FrameTabBarBase"/>
<attr name="PE_PanelButtonCommand"/>
<attr name="PE_PanelButtonBevel"/>
<attr name="PE_PanelButtonTool"/>
<attr name="PE_PanelMenuBar"/>
<attr name="PE_PanelToolBar"/>
<attr name="PE_PanelLineEdit"/>
<attr name="PE_IndicatorArrowDown"/>
<attr name="PE_IndicatorArrowLeft"/>
<attr name="PE_IndicatorArrowRight"/>
<attr name="PE_IndicatorArrowUp"/>
<attr name="PE_IndicatorBranch"/>
<attr name="PE_IndicatorButtonDropDown"/>
<attr name="PE_IndicatorCheckBox"/>
<attr name="PE_IndicatorDockWidgetResizeHandle"/>
<attr name="PE_IndicatorHeaderArrow"/>
<attr name="PE_IndicatorMenuCheckMark"/>
<attr name="PE_IndicatorProgressChunk"/>
<attr name="PE_IndicatorRadioButton"/>
<attr name="PE_IndicatorSpinDown"/>
<attr name="PE_IndicatorSpinMinus"/>
<attr name="PE_IndicatorSpinPlus"/>
<attr name="PE_IndicatorSpinUp"/>
<attr name="PE_IndicatorToolBarHandle"/>
<attr name="PE_IndicatorToolBarSeparator"/>
<attr name="PE_PanelTipLabel"/>
<attr name="PE_IndicatorTabTear"/>
<attr name="PE_PanelScrollAreaCorner"/>
<attr name="PE_Widget"/>
<attr name="PE_IndicatorColumnViewArrow"/>
<attr name="PE_FrameStatusBarItem"/>
<attr name="PE_IndicatorItemViewItemCheck"/>
<attr name="PE_IndicatorItemViewItemDrop"/>
<attr name="PE_PanelItemViewItem"/>
<attr name="PE_PanelItemViewRow"/>
<attr name="PE_PanelStatusBar"/>
<attr name="PE_IndicatorTabClose"/>
<attr name="PE_PanelMenu"/>
<attr name="PE_IndicatorTabTearRight"/>
<attr name="PE_CustomBase"/>
</class>
<class path="PyQt6.QtWidgets.QStyle.RequestSoftwareInputPanel">
<attr name="RSIP_OnMouseClickAndAlreadyFocused"/>
<attr name="RSIP_OnMouseClick"/>
</class>
<class path="PyQt6.QtWidgets.QStyle.StandardPixmap">
<attr name="SP_TitleBarMenuButton"/>
<attr name="SP_TitleBarMinButton"/>
<attr name="SP_TitleBarMaxButton"/>
<attr name="SP_TitleBarCloseButton"/>
<attr name="SP_TitleBarNormalButton"/>
<attr name="SP_TitleBarShadeButton"/>
<attr name="SP_TitleBarUnshadeButton"/>
<attr name="SP_TitleBarContextHelpButton"/>
<attr name="SP_DockWidgetCloseButton"/>
<attr name="SP_MessageBoxInformation"/>
<attr name="SP_MessageBoxWarning"/>
<attr name="SP_MessageBoxCritical"/>
<attr name="SP_MessageBoxQuestion"/>
<attr name="SP_DesktopIcon"/>
<attr name="SP_TrashIcon"/>
<attr name="SP_ComputerIcon"/>
<attr name="SP_DriveFDIcon"/>
<attr name="SP_DriveHDIcon"/>
<attr name="SP_DriveCDIcon"/>
<attr name="SP_DriveDVDIcon"/>
<attr name="SP_DriveNetIcon"/>
<attr name="SP_DirOpenIcon"/>
<attr name="SP_DirClosedIcon"/>
<attr name="SP_DirLinkIcon"/>
<attr name="SP_FileIcon"/>
<attr name="SP_FileLinkIcon"/>
<attr name="SP_ToolBarHorizontalExtensionButton"/>
<attr name="SP_ToolBarVerticalExtensionButton"/>
<attr name="SP_FileDialogStart"/>
<attr name="SP_FileDialogEnd"/>
<attr name="SP_FileDialogToParent"/>
<attr name="SP_FileDialogNewFolder"/>
<attr name="SP_FileDialogDetailedView"/>
<attr name="SP_FileDialogInfoView"/>
<attr name="SP_FileDialogContentsView"/>
<attr name="SP_FileDialogListView"/>
<attr name="SP_FileDialogBack"/>
<attr name="SP_DirIcon"/>
<attr name="SP_DialogOkButton"/>
<attr name="SP_DialogCancelButton"/>
<attr name="SP_DialogHelpButton"/>
<attr name="SP_DialogOpenButton"/>
<attr name="SP_DialogSaveButton"/>
<attr name="SP_DialogCloseButton"/>
<attr name="SP_DialogApplyButton"/>
<attr name="SP_DialogResetButton"/>
<attr name="SP_DialogDiscardButton"/>
<attr name="SP_DialogYesButton"/>
<attr name="SP_DialogNoButton"/>
<attr name="SP_ArrowUp"/>
<attr name="SP_ArrowDown"/>
<attr name="SP_ArrowLeft"/>
<attr name="SP_ArrowRight"/>
<attr name="SP_ArrowBack"/>
<attr name="SP_ArrowForward"/>
<attr name="SP_DirHomeIcon"/>
<attr name="SP_CommandLink"/>
<attr name="SP_VistaShield"/>
<attr name="SP_BrowserReload"/>
<attr name="SP_BrowserStop"/>
<attr name="SP_MediaPlay"/>
<attr name="SP_MediaStop"/>
<attr name="SP_MediaPause"/>
<attr name="SP_MediaSkipForward"/>
<attr name="SP_MediaSkipBackward"/>
<attr name="SP_MediaSeekForward"/>
<attr name="SP_MediaSeekBackward"/>
<attr name="SP_MediaVolume"/>
<attr name="SP_MediaVolumeMuted"/>
<attr name="SP_DirLinkOpenIcon"/>
<attr name="SP_LineEditClearButton"/>
<attr name="SP_DialogYesToAllButton"/>
<attr name="SP_DialogNoToAllButton"/>
<attr name="SP_DialogSaveAllButton"/>
<attr name="SP_DialogAbortButton"/>
<attr name="SP_DialogRetryButton"/>
<attr name="SP_DialogIgnoreButton"/>
<attr name="SP_RestoreDefaultsButton"/>
<attr name="SP_CustomBase"/>
</class>
<class path="PyQt6.QtWidgets.QStyle.StateFlag">
<attr name="State_None"/>
<attr name="State_Enabled"/>
<attr name="State_Raised"/>
<attr name="State_Sunken"/>
<attr name="State_Off"/>
<attr name="State_NoChange"/>
<attr name="State_On"/>
<attr name="State_DownArrow"/>
<attr name="State_Horizontal"/>
<attr name="State_HasFocus"/>
<attr name="State_Top"/>
<attr name="State_Bottom"/>
<attr name="State_FocusAtBorder"/>
<attr name="State_AutoRaise"/>
<attr name="State_MouseOver"/>
<attr name="State_UpArrow"/>
<attr name="State_Selected"/>
<attr name="State_Active"/>
<attr name="State_Open"/>
<attr name="State_Children"/>
<attr name="State_Item"/>
<attr name="State_Sibling"/>
<attr name="State_Editing"/>
<attr name="State_KeyboardFocusChange"/>
<attr name="State_ReadOnly"/>
<attr name="State_Window"/>
<attr name="State_Small"/>
<attr name="State_Mini"/>
</class>
<class path="PyQt6.QtWidgets.QStyle.StyleHint">
<attr name="SH_EtchDisabledText"/>
<attr name="SH_DitherDisabledText"/>
<attr name="SH_ScrollBar_MiddleClickAbsolutePosition"/>
<attr name="SH_ScrollBar_ScrollWhenPointerLeavesControl"/>
<attr name="SH_TabBar_SelectMouseType"/>
<attr name="SH_TabBar_Alignment"/>
<attr name="SH_Header_ArrowAlignment"/>
<attr name="SH_Slider_SnapToValue"/>
<attr name="SH_Slider_SloppyKeyEvents"/>
<attr name="SH_ProgressDialog_CenterCancelButton"/>
<attr name="SH_ProgressDialog_TextLabelAlignment"/>
<attr name="SH_PrintDialog_RightAlignButtons"/>
<attr name="SH_MainWindow_SpaceBelowMenuBar"/>
<attr name="SH_FontDialog_SelectAssociatedText"/>
<attr name="SH_Menu_AllowActiveAndDisabled"/>
<attr name="SH_Menu_SpaceActivatesItem"/>
<attr name="SH_Menu_SubMenuPopupDelay"/>
<attr name="SH_ScrollView_FrameOnlyAroundContents"/>
<attr name="SH_MenuBar_AltKeyNavigation"/>
<attr name="SH_ComboBox_ListMouseTracking"/>
<attr name="SH_Menu_MouseTracking"/>
<attr name="SH_MenuBar_MouseTracking"/>
<attr name="SH_ItemView_ChangeHighlightOnFocus"/>
<attr name="SH_Widget_ShareActivation"/>
<attr name="SH_Workspace_FillSpaceOnMaximize"/>
<attr name="SH_ComboBox_Popup"/>
<attr name="SH_TitleBar_NoBorder"/>
<attr name="SH_BlinkCursorWhenTextSelected"/>
<attr name="SH_RichText_FullWidthSelection"/>
<attr name="SH_Menu_Scrollable"/>
<attr name="SH_GroupBox_TextLabelVerticalAlignment"/>
<attr name="SH_GroupBox_TextLabelColor"/>
<attr name="SH_Menu_SloppySubMenus"/>
<attr name="SH_Table_GridLineColor"/>
<attr name="SH_LineEdit_PasswordCharacter"/>
<attr name="SH_DialogButtons_DefaultButton"/>
<attr name="SH_ToolBox_SelectedPageTitleBold"/>
<attr name="SH_TabBar_PreferNoArrows"/>
<attr name="SH_ScrollBar_LeftClickAbsolutePosition"/>
<attr name="SH_UnderlineShortcut"/>
<attr name="SH_SpinBox_AnimateButton"/>
<attr name="SH_SpinBox_KeyPressAutoRepeatRate"/>
<attr name="SH_SpinBox_ClickAutoRepeatRate"/>
<attr name="SH_Menu_FillScreenWithScroll"/>
<attr name="SH_ToolTipLabel_Opacity"/>
<attr name="SH_DrawMenuBarSeparator"/>
<attr name="SH_TitleBar_ModifyNotification"/>
<attr name="SH_Button_FocusPolicy"/>
<attr name="SH_MessageBox_UseBorderForButtonSpacing"/>
<attr name="SH_TitleBar_AutoRaise"/>
<attr name="SH_ToolButton_PopupDelay"/>
<attr name="SH_FocusFrame_Mask"/>
<attr name="SH_RubberBand_Mask"/>
<attr name="SH_WindowFrame_Mask"/>
<attr name="SH_SpinControls_DisableOnBounds"/>
<attr name="SH_Dial_BackgroundRole"/>
<attr name="SH_ComboBox_LayoutDirection"/>
<attr name="SH_ItemView_EllipsisLocation"/>
<attr name="SH_ItemView_ShowDecorationSelected"/>
<attr name="SH_ItemView_ActivateItemOnSingleClick"/>
<attr name="SH_ScrollBar_ContextMenu"/>
<attr name="SH_ScrollBar_RollBetweenButtons"/>
<attr name="SH_Slider_StopMouseOverSlider"/>
<attr name="SH_Slider_AbsoluteSetButtons"/>
<attr name="SH_Slider_PageSetButtons"/>
<attr name="SH_Menu_KeyboardSearch"/>
<attr name="SH_TabBar_ElideMode"/>
<attr name="SH_DialogButtonLayout"/>
<attr name="SH_ComboBox_PopupFrameStyle"/>
<attr name="SH_MessageBox_TextInteractionFlags"/>
<attr name="SH_DialogButtonBox_ButtonsHaveIcons"/>
<attr name="SH_MessageBox_CenterButtons"/>
<attr name="SH_Menu_SelectionWrap"/>
<attr name="SH_ItemView_MovementWithoutUpdatingSelection"/>
<attr name="SH_ToolTip_Mask"/>
<attr name="SH_FocusFrame_AboveWidget"/>
<attr name="SH_TextControl_FocusIndicatorTextCharFormat"/>
<attr name="SH_WizardStyle"/>
<attr name="SH_ItemView_ArrowKeysNavigateIntoChildren"/>
<attr name="SH_Menu_Mask"/>
<attr name="SH_Menu_FlashTriggeredItem"/>
<attr name="SH_Menu_FadeOutOnHide"/>
<attr name="SH_SpinBox_ClickAutoRepeatThreshold"/>
<attr name="SH_ItemView_PaintAlternatingRowColorsForEmptyArea"/>
<attr name="SH_FormLayoutWrapPolicy"/>
<attr name="SH_TabWidget_DefaultTabPosition"/>
<attr name="SH_ToolBar_Movable"/>
<attr name="SH_FormLayoutFieldGrowthPolicy"/>
<attr name="SH_FormLayoutFormAlignment"/>
<attr name="SH_FormLayoutLabelAlignment"/>
<attr name="SH_ItemView_DrawDelegateFrame"/>
<attr name="SH_TabBar_CloseButtonPosition"/>
<attr name="SH_DockWidget_ButtonsHaveFrame"/>
<attr name="SH_ToolButtonStyle"/>
<attr name="SH_RequestSoftwareInputPanel"/>
<attr name="SH_ListViewExpand_SelectMouseType"/>
<attr name="SH_ScrollBar_Transient"/>
<attr name="SH_Menu_SupportsSections"/>
<attr name="SH_ToolTip_WakeUpDelay"/>
<attr name="SH_ToolTip_FallAsleepDelay"/>
<attr name="SH_Widget_Animate"/>
<attr name="SH_Splitter_OpaqueResize"/>
<attr name="SH_LineEdit_PasswordMaskDelay"/>
<attr name="SH_TabBar_ChangeCurrentDelay"/>
<attr name="SH_Menu_SubMenuUniDirection"/>
<attr name="SH_Menu_SubMenuUniDirectionFailCount"/>
<attr name="SH_Menu_SubMenuSloppySelectOtherActions"/>
<attr name="SH_Menu_SubMenuSloppyCloseTimeout"/>
<attr name="SH_Menu_SubMenuResetWhenReenteringParent"/>
<attr name="SH_Menu_SubMenuDontStartSloppyOnLeave"/>
<attr name="SH_ItemView_ScrollMode"/>
<attr name="SH_TitleBar_ShowToolTipsOnButtons"/>
<attr name="SH_Widget_Animation_Duration"/>
<attr name="SH_ComboBox_AllowWheelScrolling"/>
<attr name="SH_SpinBox_ButtonsInsideFrame"/>
<attr name="SH_SpinBox_StepModifier"/>
<attr name="SH_CustomBase"/>
<attr name="SH_TabBar_AllowWheelScrolling"/>
</class>
<class path="PyQt6.QtWidgets.QStyle.SubControl">
<attr name="SC_None"/>
<attr name="SC_ScrollBarAddLine"/>
<attr name="SC_ScrollBarSubLine"/>
<attr name="SC_ScrollBarAddPage"/>
<attr name="SC_ScrollBarSubPage"/>
<attr name="SC_ScrollBarFirst"/>
<attr name="SC_ScrollBarLast"/>
<attr name="SC_ScrollBarSlider"/>
<attr name="SC_ScrollBarGroove"/>
<attr name="SC_TitleBarLabel"/>
<attr name="SC_CustomBase"/>
<attr name="SC_All"/>
</class>
<class path="PyQt6.QtWidgets.QStyle.SubElement">
<attr name="SE_PushButtonContents"/>
<attr name="SE_PushButtonFocusRect"/>
<attr name="SE_CheckBoxIndicator"/>
<attr name="SE_CheckBoxContents"/>
<attr name="SE_CheckBoxFocusRect"/>
<attr name="SE_CheckBoxClickRect"/>
<attr name="SE_RadioButtonIndicator"/>
<attr name="SE_RadioButtonContents"/>
<attr name="SE_RadioButtonFocusRect"/>
<attr name="SE_RadioButtonClickRect"/>
<attr name="SE_ComboBoxFocusRect"/>
<attr name="SE_SliderFocusRect"/>
<attr name="SE_ProgressBarGroove"/>
<attr name="SE_ProgressBarContents"/>
<attr name="SE_ProgressBarLabel"/>
<attr name="SE_ToolBoxTabContents"/>
<attr name="SE_HeaderLabel"/>
<attr name="SE_HeaderArrow"/>
<attr name="SE_TabWidgetTabBar"/>
<attr name="SE_TabWidgetTabPane"/>
<attr name="SE_TabWidgetTabContents"/>
<attr name="SE_TabWidgetLeftCorner"/>
<attr name="SE_TabWidgetRightCorner"/>
<attr name="SE_TabBarTearIndicator"/>
<attr name="SE_TreeViewDisclosureItem"/>
<attr name="SE_LineEditContents"/>
<attr name="SE_FrameContents"/>
<attr name="SE_DockWidgetCloseButton"/>
<attr name="SE_DockWidgetFloatButton"/>
<attr name="SE_DockWidgetTitleBarText"/>
<attr name="SE_DockWidgetIcon"/>
<attr name="SE_CheckBoxLayoutItem"/>
<attr name="SE_ComboBoxLayoutItem"/>
<attr name="SE_DateTimeEditLayoutItem"/>
<attr name="SE_LabelLayoutItem"/>
<attr name="SE_ProgressBarLayoutItem"/>
<attr name="SE_PushButtonLayoutItem"/>
<attr name="SE_RadioButtonLayoutItem"/>
<attr name="SE_SliderLayoutItem"/>
<attr name="SE_SpinBoxLayoutItem"/>
<attr name="SE_ToolButtonLayoutItem"/>
<attr name="SE_FrameLayoutItem"/>
<attr name="SE_GroupBoxLayoutItem"/>
<attr name="SE_TabWidgetLayoutItem"/>
<attr name="SE_ItemViewItemCheckIndicator"/>
<attr name="SE_ItemViewItemDecoration"/>
<attr name="SE_ItemViewItemText"/>
<attr name="SE_ItemViewItemFocusRect"/>
<attr name="SE_TabBarTabLeftButton"/>
<attr name="SE_TabBarTabRightButton"/>
<attr name="SE_TabBarTabText"/>
<attr name="SE_ShapedFrameContents"/>
<attr name="SE_ToolBarHandle"/>
<attr name="SE_TabBarScrollLeftButton"/>
<attr name="SE_TabBarScrollRightButton"/>
<attr name="SE_TabBarTearIndicatorRight"/>
<attr name="SE_PushButtonBevel"/>
<attr name="SE_CustomBase"/>
</class>
</class>
我从未使用过 QStyle，但属性中出现了 19 次标题栏，所以我想它是相关的，它似乎能够实现我想要的，但我不知道如何使用它。
那么如何自定义 QMessageBox 的标题栏呢？