ActionScript 3.0 :: Removing Child And Setting It To Null Completely Remove Object?
Jan 24, 2010
In document class action script file I add a movie clip to stage using
Code:
public var square:Square
square = new Square
addChild(square)
So it adds square to stage.Then after sometime I want it to be removed. I call a function "removeSquare" also located in document class. It executes the following code. And it removes the square from stage visualy.
Code:
trace("proff that it's executed")
removeChild(square)
square = null
Then of course I want to add a square to stage again, using code I written at top of the post. And remove it again, and so on..But game is lagging more and more and more. So I guess that the square is not properly removed. If you need more details about my code feel free to say, I just written that since I really doesn't know what else should be important.
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Similar Posts:
Jul 28, 2009
sometimes I remove child and trace it afterwards and it outputs null although I havent yet set it to null, why is that? and do I need to set it to null also in that case?
Code:
trace(holderArr[loadedThumbs].getChildByName("photo_bg"));
//[object MovieClip]
holderArr[loadedThumbs].removeChild(holderArr[loadedThumbs].getChildByName("photo_bg"));
[Code]....
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Jan 20, 2011
Lately I've found myself constantly writing removeEventListeners everywhere, which makes code quite messy. I know it's a best practice and such, but in general it has no sense. Garbage collector should handle such a simple task by itself, shouldn't it? Is it that hard to remove all listeners automatically when object is set to null?
So I just want to be sure if that's the case. Does setting an object to null, automatically remove all attached event listeners? In my case scenario is like this - I create an object and attach bunch of event listeners to it, then after a while I need to re-initialize this object. Of course setting this object to null is much easier then unbinding every listener by hand. And on most part listeners are anonymous functions, which means that it's not possible without code refactoring. When I simply re-initialize a variable with new I do not get duplicate listeners and such, but I'm not sure that it's previous value, along with all the listeners gets garbage-collected. Is it?
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Jun 24, 2010
To remove a dynamic displayObject completely you need removeChild or removeChildAt(index) remove all the refrences to the displayObject nulling the displayObject
But this is my case
PHP Code:
//here recto is a MovieClip on stage//i creat a dynamic display Object named newMcvar newMc:MovieClip =new MovieClip();newMc.graphics.beginFill(0x000000,1);newMc.graphics.drawRect(0,0,10,10);newMc.graphics.endFill();recto.addChildAt(newMc,1);//i refrence the newMc using
[Code].....
I believe that it is refrencing newMc but I am not sure why nulling refrenceMc has effect on newMc
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Jun 24, 2010
To remove a dynamic displayObject completely you need removeChild or removeChildAt(index) remove all the refrences to the displayObject nulling the displayObject
But this is my case
ActionScript Code:
//here recto is a MovieClip on stage
//i creat a dynamic display Object named newMc
var newMc:MovieClip =new MovieClip();
[Code].....
I believe that it is refrencing newMc but I am not sure why nulling refrenceMc has effect on newMc
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Jun 24, 2010
To remove a dynamic displayObject completely you need
RemoveChild or removeChildAt(index)
Remove all the refrences to the displayObject
Nulling the displayObject
But this is my case
PHP Code:
//here recto is a MovieClip on stage
//I creat a dynamic display Object named
newMcvar newMc:MovieClip =new MovieClip();
newMc.graphics.beginFill(0x000000,1);
newMc.graphics.drawRect(0,0,10,10);
[Code] .....
is referencing newMc or creating a copy of it. I believe that it is refrencing newMc but I am not sure why nulling refrenceMc has effect on newMc.
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Sep 30, 2009
I've having a problem when I am removing a child. There is an area where you can choose a button to click(there are multiple buttons here). Once you click a button it loads workss_mc and you can go back from there and workss_mc is being removed then work_mc is being added again. The problem is once it is added again and you click on any of the other buttons the frame label from the previous session when it was clicked is still at that location.
[Code]....
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Dec 16, 2010
I have an Movie Clip in Flash that have subobject of button type which has subobject of input text and movie clips. Right after creation core Moveclip all subobject are set to null, when I expect them to be valid objects.
[Code]...
MC_Core_design was created in Flash and exported to Actionscript. I've done this for button_1 class aswell. The code was written using Flex. When I comment out both lines that result in error I get correct view of the core Movie clip with all subobject. How can I set subobject properties right after object creation?
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Sep 18, 2010
I keep getting this error:
TypeError: Error #2007: Parameter child must be non-null.
at flash.display:: DisplayObjectContainer/removeChild()
at MethodInfo-3()
Code:
begin_txt.addEventListener(MouseEvent.CLICK, Begin);
var boxid:Number;
var score:int;
var allBoxes:Array = new Array();
//var tapBoxTime
[Code] .....
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Nov 5, 2009
I am having some problem removing a null object and I realise that I have not been unloading my swf's properly. Could someone take a look at what I have been doing and tell me what I can do to make it better. I am putting my website in an exhibiton of my design work and if it lagged up due to all the clicking it would suck! so its important.
Code:
aboutBtn.addEventListener(MouseEvent.CLICK, aboutLoad);
function aboutLoad(e:MouseEvent):void {
ldr.unload();[code]....
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Mar 30, 2010
I'm currently trying to build my first flash site.I have just set up the buttons which get to each 'section' via frame labels and the AS3 gotoAndStop function.These work without error until my 'sections' contain movieclips that are referenced in my actionscript layer... Because they do not exist in 'all frames', whenever I click my buttons I get the error, "Error #1009: Cannot access a property or method of a null object reference."It took me a while to understand and track down why I was getting this. I removed the short bit of code in my actionscripts layer that referenced the movieclips in each section (I had some custom scrollbars set up) and it worked without error.
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Jul 24, 2009
I have written this little script, as i want to remove some of the text fields that are currently contained within the Display Objec, however it does not like to see the TextField as a varaible name. How would i convert the object from an array to become a textfield that can be removed, after being added through
addChild()
This is the script
var delayHeading:Number = 1500;var repeatHeading:int = 1;var setShow:Timer = new Timer(delayHeading, repeatHeading);setShow.start();setShow.addEventListener(TimerEvent.TIMER_COMPLETE, maybeLater);
[Code].....
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Mar 27, 2009
I am trying to figure out the logic to remove a nullreference error that is popping up when an item is not dragged. Inthe code, I have a stopDrag setup for the stage. It works asexpected unless the user clicks the item but doesn't drag it. Itcauses the variable I have set to bring the name of the dropTargetto be a null which crashes the system. I have tried to declare thevariable with a default value but it still doesn't work.It is the targetStop code that it is crashing on. Is thereanyway to default a value so I can do an if / then statement todetermine if there is a value? I've tried: if (targetStop == null)but that doesn't seem to work.
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Feb 19, 2012
having trouble removing loaded child object b4 loading a new one i can load a child object with this script if button is pressed:
[Code]...
but having difficulty unloading child object when just that mc_char.btn_darkangel button is pressed. Cause otherwise it just adds another instance then another and another and the different instances kinda pile ontop of each other my question is how can i incorporate removeChild script so that mc_char.btn_darkangel doesn't just pile instances of image ontop of each other
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Sep 1, 2009
[Code]...
So when I navigate out of this movieclip once the function home1 is fired, I get the following error TypeError: Error #1009: Cannot access a property or method of a null object reference. at home_fla::mc_content_13/follow() I know it is the function looking for that mouseThing_mc that is not there.
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Apr 7, 2009
I'm having an issue with MOUSE_OUT triggering before MOUSE_OVER has a chance. I have a global mouse listener class that listens to every mouse event and sends the object involved a message telling it when a mouse event has happened. When a Menu object is opened it adds a bunch of children and when it's closed it removes them all. The problem comes when moving the mouse from the Menu to the Children, Menu receives a MOUSE_OUT event and closes before the Child receives a MOUSE_OVER.
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Sep 11, 2010
if I add a clip to the stage as a child and remove the parent and set the parent equal to null, does the child get collected and removed from memory? What if the child has an image loaded into it as its child?
In my application I'm loading a series of png images as overlays that can be tinted for customizing in this app. When I trace my memory, the basic app idles at 64,000 k. The exact second I load those overlay images it goes up to 205,000k. If I remove those clips and "clear" the stage I should go back down to 64,000 k if everything is removed and collected correctly, right? It's not, it's hanging at 215,000 k. Are my images being cached and that is the reason for the memory staying up? If so, how do I prevent that. Or upon removing the parent of the image how can I un-cache the image.
If a user switches between models and loads several different items then the application actually crashes the Flash environment because of too much memory usage. It also does the same to browsers.
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Oct 12, 2011
I want to make a static function that I can use in all the custom classes.It should be some kill(); function that would remove the object from the stage as well as removing its event listeners. I made it in Document class, and it didn't work. Here's the code:
ActionScript Code:
public static function kill(e:DisplayObject)
{[code].....
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Jun 28, 2009
I have made an xml object and add few children to it. I use appendChild() to add a child to the XML. But if i want to remove one, what should i do? I tried to search in the reference but I cant find a remove function.
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Nov 24, 2009
I seem to be having a recurring problem attaching events to a button i have created within 2 other movieclips.I get the following error:
TypeError: Error #1009: Cannot access a property or method of a null object reference.
So it looks like it can't find the button, in order to attach the event listener. The question is why? I am attaching a similar event to a button on the main timeline and that works fine. So it looks like a scope issue, but I am referring to it properly.
code below:
Code:
import flash.net.navigateToURL;
import flash.net.URLRequest;
import flash.display.*;[code]................
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Sep 7, 2008
I have a web site that creates a page by calling another class object. When I return from that page to the Main page I want the old page removed. I have done it like this but I am getting errors.
Two vars in GlobalVarsContainer:
public static var removePages:Boolean;
public static var pageToRemove:Object;
Create new page object:
function onClickBtn1():void {
var servicesHome:ServicesHome=new ServicesHome();
addChild(servicesHome);
}
[Code] .....
This is the error:
ReferenceError: Error #1065: Variable servicesHome is not defined.
So I know it's getting back here with all vars set correctly. I've tried changing the public static var pageToRemove:Object; to a string but that is not right.
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Jul 24, 2009
ArgumentError: Error #2025: The supplied DisplayObject must be a child of the caller.
at flash.display::DisplayObjectContainer/removeChild()
at working_loader_container3_fla::MainTimeline/frame4()
at flash.display::MovieClip/prevFrame()
I have been getting this error after a bunch of different ways of trying this. I am attempting to create a new instance of my movieclip which displays external images via xml. I want a new instance of the movieclip every other frame and need to be able to remove each instance on every other frame. It will work going forwards, with a remove child call but as soon as I go back a frame, the error pops up.
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May 19, 2010
I got this error upon trying to remove the child object from a sprite using a timer.
function notify(e:Event){
var bx = new box();
con.addChild(bx);
[Code]....
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Mar 5, 2012
I made a game where you have a bunch of enemies coming at you from the top of the screen and you move your mouse to avoid them but now i am trying to add a shooting ability and I tried using the code
if (shipenimy.hitTestObject(bullet)){
removeChild(shipenimy);
}else { }
but when this happens it removes the child from being displayed but even though it is not displayed if you go to where it would be it still counts it as a collision and will end the game even though the child has been removed and I need to find a way to completely remove it so that there is not a chance of running into it after you have shot it.
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Nov 13, 2009
How do I completely remove a movieclip? I am able to create a moviecilp, then add it to the stage with addChild(), then I am able to remove it from the display list by using removeChild()However, the movieclip is still present. Here's what I did.I created a movieclip.. which has a trace on the 10th frame : trace("Movieclip still exists")On the 20th frame I have : a reference to a function which is on the document classThis function is this
Code:
function removeMC():void{
removeChild(mc)
[code]....
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Mar 25, 2009
I have a page that I'm working on that works great except I keep getting an "Output" message stating: TypeError: Error #1009: Cannot access a property or method of a null object reference. at StillFrameFoto_fla::MainTimeline/portfolioOut() I'm pretty sure I just need to get rid of my button instance, but I don't know how. I have my buttons on frame 1 and I want them completely gone when it moves to frame 2. Here is the code for one of my buttons on the first frame:
[Code]....
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Nov 15, 2011
I need to remove a MovieClip from the stage completely and keep it that way. The following code works just fine but when I come back to that frame later the MovieClip is there again.
Code:
removeChild(myMovieclip);
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May 12, 2010
I have created 2 sprites each containing a dynamic text field child. I then add this as a child of the stage. (I have done this in order to make the text clickable with a hand cursor on mouseover)It loads in fine, I just run into problems when trying to REMOVE it the sprite containing the text."ArgumentError: Error #2025: The supplied DisplayObject must be a child of the caller."Sections concerned in red:
Code:
import fl.transitions.Tween;
import fl.transitions.easing.*;
[code]........
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Jul 9, 2009
I want the mc to be removed with All its timers, events,... Is there a simple way to do this?
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Mar 8, 2011
This is my code
[Code]....
The problem is that even tho I ask to remove the random picked number from array, it can still get repicked.
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