AS3列表問題

Question

我想要一個List對象添加到動態階段，但我總是當某一行被稱爲一個錯誤：

TypeError: Error #2007: Parameter child must be non-null. 
at flash.display::DisplayObjectContainer/addChildAt() 
at fl.controls::BaseButton/fl.controls:BaseButton::drawBackground() 
at fl.controls::LabelButton/fl.controls:LabelButton::draw() 
at fl.core::UIComponent/drawNow() 
at fl.controls::List/fl.controls:List::drawList() 
at fl.controls::List/fl.controls:List::draw() 
at fl.core::UIComponent/fl.core:UIComponent::callLaterDispatcher() 
TypeError: Error #2007: Parameter child must be non-null. 
at flash.display::DisplayObjectContainer/addChildAt() 
at fl.controls::BaseButton/fl.controls:BaseButton::drawBackground() 
at fl.controls::LabelButton/fl.controls:LabelButton::draw() 
at fl.core::UIComponent/fl.core:UIComponent::callLaterDispatcher() 

：在運行時拋出

input.addItem({label:"test",data:"test"}); 

錯誤

任何人有任何想法如何解決這個問題？謝謝你的幫助。

Answer 1

也許google有幫助嗎？

http://www.actionscript.org/forums/showthread.php3?t=150778