Flash AS3: Le DisplayObject fourni doit être un enfant de l'erreur de l'appelant

Question

Je crée un script d'action pour simuler 3 états de bouton et charger dans les clips en conséquence.

Je reçois cette erreur

ArgumentError: Error #2025: The supplied DisplayObject must be a child of the caller. 
    at flash.display::DisplayObjectContainer/removeChild() 
    at Untitled_fla::MainTimeline/sack_btnMouseOut() 

Lorsque vous essayez de le faire

//get the objects 
var addSackStill:sack_still = new sack_still(); 
var addSackHover:sack_hover = new sack_hover(); 
var addSackClick:sack_click = new sack_click(); 

//add the still object to the stage 
addChild(addSackStill); 
var SACK_X = 570.55; 
var SACK_Y = 603.95; 
addSackStill.x = SACK_X; 
addSackStill.y = SACK_Y; 
addSackHover.x = SACK_X; 
addSackHover.y = SACK_Y; 
addSackClick.x = SACK_X; 
addSackClick.y = SACK_Y; 

//create the event listeners 
addSackStill.addEventListener(MouseEvent.MOUSE_OVER, sack_btnMouseOver); 
addSackHover.addEventListener(MouseEvent.MOUSE_OUT, sack_btnMouseOut); 
addSackHover.addEventListener(MouseEvent.CLICK, sack_btnClick); 


//here are the functions for mouse over, mouse off, and click 
function sack_btnMouseOver(event:MouseEvent):void { 
    trace("mouse over"); 
    removeChild(addSackStill); //remove the movie clip 
    addChild(addSackHover); //add sackclick to the stage 
} 

function sack_btnMouseOut(event:MouseEvent):void { 
    trace("mouse out"); 
    removeChild(addSackHover); //remove the movie clip 
    addChild(addSackStill); //add sackclick to the stage 
} 

function sack_btnClick(event:MouseEvent):void { 
    trace("Click"); 
    removeChild(addSackHover); //remove the movie clip 
    addChild(addSackStill); //add sackclick to the stage 
} 

Est-ce que je fais quelque chose de mal?

Answer 1

Je suppose qu'ils ne sont pas ajoutés lorsque vous essayez de les supprimer. Assurez-vous que les parents existent avant de les supprimer. En outre, vous pouvez essayer parent.removeChild, plutôt que de supprimer de l'objet:

//here are the functions for mouse over, mouse off, and click 
function sack_btnMouseOver(event:MouseEvent):void { 
    trace("mouse over"); 
    if (addSackStill.parent) { addSackStill.parent.removeChild(addSackStill); } //remove the movie clip 
    addChild(addSackHover); //add sackclick to the stage 
} 

function sack_btnMouseOut(event:MouseEvent):void { 
    trace("mouse out"); 
    if (addSackHover.parent) { addSackHover.parent.removeChild(addSackHover); } //remove the movie clip 
    addChild(addSackStill); //add sackclick to the stage 
} 

function sack_btnClick(event:MouseEvent):void { 
    trace("Click"); 
    if (addSackHover.parent) { addSackHover.parent.removeChild(addSackHover); } //remove the movie clip 
    addChild(addSackStill); //add sackclick to the stage 
}