flex问题TypeError: Error #1009:

Question

TypeError: Error #1009: 无法访问空对象引用的属性或方法。
at mx.managers::FocusManager/childHideHandler()[E:\dev\4.0.0\frameworks\projects\framework\src\mx\managers\FocusManager.as:1744]
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at mx.core::UIComponent/dispatchEvent()[E:\dev\4.0.0\frameworks\projects\framework\src\mx\core\UIComponent.as:12266]
at mx.core::UIComponent/setVisible()[E:\dev\4.0.0\frameworks\projects\framework\src\mx\core\UIComponent.as:3038]
at mx.core::UIComponent/set visible()[E:\dev\4.0.0\frameworks\projects\framework\src\mx\core\UIComponent.as:2997]
at Robin/__usv_creationComplete()[E:\workFlashBuilder\Robin\src\Robin.mxml:154]
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at mx.core::UIComponent/dispatchEvent()[E:\dev\4.0.0\frameworks\projects\framework\src\mx\core\UIComponent.as:12266]
at mx.core::UIComponent/set initialized()[E:\dev\4.0.0\frameworks\projects\framework\src\mx\core\UIComponent.as:1577]
at mx.managers::LayoutManager/doPhasedInstantiation()[E:\dev\4.0.0\frameworks\projects\framework\src\mx\managers\LayoutManager.as:759]
at mx.managers::LayoutManager/doPhasedInstantiationCallback()[E:\dev\4.0.0\frameworks\projects\framework\src\mx\managers\LayoutManager.as:1072]

Answer 1

看你 E:\workFlashBuilder\Robin\src\Robin.mxml:154 这行写了什么了？