使用工具提示时，我收到错误#2025:提供的DisplayObject必须是调用者的子级

Question

当我添加工具提示，然后删除工具提示时，我在舞台上单击时得到以下错误：

ArgumentError: Error #2025: The supplied DisplayObject must be a child of the caller.
    at flash.display::DisplayObjectContainer/getChildIndex()
    at mx.managers::SystemManager/http://www.adobe.com/2006/flex/mx/internal::rawChildren_getChildIndex()[C:\Jenkins\workspace\flex-sdk_release-candidate\frameworks\projects\framework\src\mx\managers\SystemManager.as:2195]
    at mx.managers::SystemChildrenList/removeChild()[C:\Jenkins\workspace\flex-sdk_release-candidate\frameworks\projects\framework\src\mx\managers\SystemChildrenList.as:167]
    at mx.managers::ToolTipManagerImpl/http://www.adobe.com/2006/flex/mx/internal::reset()[C:\Jenkins\workspace\flex-sdk_release-candidate\frameworks\projects\framework\src\mx\managers\ToolTipManagerImpl.as:1379]
    at mx.managers::ToolTipManagerImpl/http://www.adobe.com/2006/flex/mx/internal::targetChanged()[C:\Jenkins\workspace\flex-sdk_release-candidate\frameworks\projects\framework\src\mx\managers\ToolTipManagerImpl.as:892]
    at mx.managers::ToolTipManagerImpl/http://www.adobe.com/2006/flex/mx/internal::checkIfTargetChanged()[C:\Jenkins\workspace\flex-sdk_release-candidate\frameworks\projects\framework\src\mx\managers\ToolTipManagerImpl.as:797]
    at mx.managers::ToolTipManagerImpl/http://www.adobe.com/2006/flex/mx/internal::toolTipMouseOverHandler()[C:\Jenkins\workspace\flex-sdk_release-candidate\frameworks\projects\framework\src\mx\managers\ToolTipManagerImpl.as:1623]

我已经想尽办法摆脱它了。下面是我使用的代码：

// adding
PopUpManager.addPopUp(rulerPopUp, SystemManager.getSWFRoot(this));
toolTipPopUp = ToolTipManager.createToolTip("HELLO", event.stageX, event.stageY) as ToolTip;
ToolTipManager.currentToolTip = toolTipPopUp;

swfRoot.addEventListener(MouseEvent.MOUSE_MOVE, mouseRulerMoveHandler, true, EventPriority.CURSOR_MANAGEMENT, true);
swfRoot.addEventListener(MouseEvent.MOUSE_UP, mouseRulerUpHandler, true, EventPriority.CURSOR_MANAGEMENT, true);

// removing
swfRoot.removeEventListener(MouseEvent.MOUSE_MOVE, mouseRulerMoveHandler, true);
swfRoot.removeEventListener(MouseEvent.MOUSE_UP, mouseRulerUpHandler, true);

if (toolTipPopUp && toolTipPopUp.stage) {
    ToolTipManager.destroyToolTip(toolTipPopUp);
    toolTipPopUp = null;
}

有没有人看到我得到这个错误的原因？

Answer 1

将currentToolTip设置为null似乎可以解决此问题。

if (toolTipPopUp && toolTipPopUp.stage) { ToolTipManager.destroyToolTip( toolTipPopUp )；ToolTipManager.currentToolTip = null；//添加此行toolTipPopUp= null；}

从那以后，我再也没有遇到过任何错误。