ActionScript 3.0 :: RemoveChild Removes Object From The Stage And Null
Aug 26, 2011
I have a removeChild and null question. I know removeChild removes my object from the stage but stays in memory until I call null on it. My question is, if I set the object to null, do I have to removeChild it at all? For example, I have a movieclip where I addChild lots of objects to it. So If I want to completely remove all traces of said movieclip and all its children, can I just set movieClip = null, or do I have to removeChild all its children and the movieclip itself beforehand.
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Mar 25, 2011
I'm working on a simple Flash game for school. In one level, multiple enemies spawn and the player is supposed to shoot them. I used removeChild() to get rid of the enemy that got shot, but when I click (hit) an enemy, everything on my stage gets removed; it goes completely blank.The function to populate my stage with enemies is the following:
private function Game2():void{
for (var i:uint=0; i<50; i++) {
var man:MovieClip = new man_mc();
[code].....
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Jun 25, 2011
Here are my classes
Main - creates preloader
Preloader - createas Website
Website - creates MainMenu
When a button in the main menu is clicked, it creates an object. And when another one is clicked, that object needs to be removed. The removing part got a little bit messy.
package src {
import com.greensock.TweenLite;
import flash.display.MovieClip;
import flash.events.MouseEvent;
import flash.geom.Point;
[Code] .....
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Mar 21, 2009
I was wondering if you remove a child with "removeChild" if it removes everything what was in the movieClip.I doesn't remove listeners automatically (right?). But does it remove bitmapData (from the memory) for example? Because I don't want to remove all bitmaps with the Dispose.Does it help if I initialize the garbage collector: "System.gc();".It does help with removing listeners automatically, but what about other things?On the adobe website about the GC.But it says:For the Flash Player debugger version and AIR applications only.But does this mean that if I play the SWF outside of Flash this GC doesn't do anything?
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Sep 3, 2009
I am loading in a swf into my file, via the loader class. When I remove this child .. does all the swf remain in the memory, or is it discarded? I want to remove it entirely ..
Code:
var myLoader:Loader = new Loader();
myLoader.load("thisMovie.swf");
addChild(myLoader);[code]....
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Jan 19, 2012
I'm trying to remove a movieclip that I added in the same class but keep getting this error: TypeError: Error #1009: Cannot access a property or method of a null object reference.Here's my code:
public function wallDown():void
{
_asTrans = new ASTrans();[code].....
I also tried to use _gameModel.screen.removeChild(_asTrans); as I said above but with the same results.
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Nov 21, 2011
I am using removeChild() to remove a MovieClip. And via tests, I can confirm that it's working fine ( stage.contains(mc) returns false ). But the MovieClip still does not seem to be removed, as if the stage is not updated correctly.
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Mar 15, 2009
I'm working on a project which uses timline animation. The animated objects are involved in a collision detection script.
When they collide with other objects, their timelines are told to stop() and they're removed using removeChild. At this point they have a value of null (I've tested this.)
Strangely however, they invisibly re-instantiat themselves when the timeline animation loops back to frame 1. There's no code telling them to play anywhere in the program. They still have null values, but their collsion code still affects other objects.
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Apr 4, 2010
If I removeChild an object from the stage can it still be detected by a hittest? I have objects that are tweening off the stage and if they hit other objects they stop their tween i use removeChild to remove objects that I don't want a hittest to occur on which is the nature of my question.
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Feb 20, 2011
I have a main class that calls and removes screens with addChild and removeChild, these screens are movie clips.My issue lies in these movie clips, each clip is linked to a class - e.g. confidence.as links to my confidence screen.I am trying to add buttons and pieces of text from this class file onto the confidence screen, so essentially adding more movieclips on top of a movieclip that has already been added. I keep getting this error:TypeError: Error #2007: Parameter child must be non-null.I could do with some help figuring out how to add objects to my screens, as I am trying to prevent having everything in one class.
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Feb 10, 2009
I'm doing a tutorial and I get this error about the "stage". I just copied the tutorial code.. what's missing ?
Code: TypeError: Error #1009: Cannot access a property or method of a null object reference.
at ParticleDemo() at myFlashFile_fla::MainTimeline/frame1()
Code:
package {
import flash.display.Sprite;
import flash.events.Event;
[Code]...
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Mar 11, 2010
Below is my code, and the question is explained after it.
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
xmlns:cal="cal.*"
layout="absolute"[code]...
This is exact error message I get: TypeError: Error #1009: Cannot access a property or method of a null object reference.
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Sep 3, 2010
When you make a simple game that maybe has a few different 'screens' like start, help, and high score, and a few levels, and you don't wish to load from external swf's. What is the best practice for making these games as far as the timeline?To just have ONE frame that add's and removes child movieclips from the stage?
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Feb 4, 2012
I think my issue is to do with referencing the stage, but not to sure. When I try
[CODE]...
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Sep 9, 2009
i got this error Cannot access a property or method of a null object reference. whenever I clicked on my button
[Code]...
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Feb 20, 2011
With the following code, everything works as expected, and I retain both the default namespace, and the xsi namespace in the trace printout.
var tempData = <objects xmlns="http://www.spicefactory.org/parsley" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
</objects>
[Code].....
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Jul 9, 2009
I am new to AS3 and only recently have been able to understand the display list.I am trying to run this code in my file.I made two movie clips in my library. Gave them class name as "One" and "Two"Now, this is the code that I run:
Code:
var one:One = new One();
var two:Two = new Two();
[code].....
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Mar 7, 2011
Im creating a game. When the current game has finished, I thinking to do this:
removeChild(game)
game = null
then
game = new Game()
Doing this way, it automatically removes the games object instances? It automatically removes the games object instances events? That would be an easy way to restart the game, if yes for both questions.
Can I do like that, or I have to remove all objects and events manually?
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Dec 21, 2009
In my application, I have a chart that I want to display in a TitleWindow when clicked on.
var win:TitleWindow = PopUpManager.createPopUp(this, TitleWindow, false) as TitleWindow;
win.addChild(myChart);
PopUpManager.bringToFront(win);
It does indeed place the chart in the titlewindow that shows up, but it removes the original chart from the parent. Then, when the titlewindow is closed, my chart is simply gone. I can't figure out how to clone the chart -- all the methods I've tried failed
Solution:
public var barChart:BarChart;
public function onClick(e:Object):void
{
[Code].....
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Nov 16, 2010
I've got these Flash students I TA for a course, and they are doing drag and drop exercises and have come across some weirdness.(They are using a frames based design to represent different pages of activity, with a menu to goto each frame under user control.)At author time:
1. they set up drag and drop as3 for an object on a particular frame.
2. when startDrag is initiated, they moved the dragged object to the top of the display list, so it appears to float above all other objects as the user drags.
at runtime,a problem appears:the object seems to have been pulled out of the frame, and now floats in a display list above any frame that may be advanced to.What's going on here? It's like the object got pulled off the authortime stage and now is disconnected. Going back to the drag and drop frame shows the original object again, reinstanced, along with this copy that got pulled out.
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Dec 19, 2009
I have begun on a list: My reference is null!Stage is null! Convert this code from as 2 to as 3 for me! Crossdomain policies are in the way of my cool idea Dynamic property names I need to use stuff on the parent! I don't want my children to scale when I scale the parent! Classes vs instances. Mod note: I do not want this topic pinned, we will use a fresh topic once we have agreed to the content.
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Aug 11, 2011
If im usin function to add a mc to the stage like so:var myChild:MC= new MC();
function somefunc()
{
stage.addChild(myMC)
[code].....
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Jul 28, 2010
I have 4 movies that need to be loaded in sequence. The first movie loads the second one, the second one loads the third, then the third one loads the fourth. What I can't figure out is how to make sure there's only one movie loaded at any time. I've tried removeChildAt(0) and other methods. What's the best way to load a movie to the stage and wipe out what was on the stage?
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Jun 29, 2011
If I set an Object = null, does that remove all references to the Object's variables assuming there are no external references to said variables? Or do I have to manually set all said variables = null?
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Jul 18, 2010
the script i wrote is working fine. but the script attached to the flash player which i have no control over is throwing a script error (im using IE8).how can i fix this? if i run it locally there is no error.
'null' is null or not an object
try { document.getElementById("").SetReturnValue(__flash__toXML(function() { return document.location.hostname; }()) ); } catch (e) { document.getElementById("").SetReturnValue("<undefined/>"); }
but this is from flash script and i dont have control over it. it just say JScript - script block.
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Sep 15, 2010
I have the following piece of code(part of a much bigger program). I this code I am re-using a motion that has been previously used successfully. The trace stmts are used to identify the exact location of the error and the error conditions as best I can.[code]
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Mar 6, 2012
When you cast null to an object using Object(null), the result is an object.When you cast undefined to an object using Object(undefined), the result is an object.But saying null as Object or undefined as Object remains null.Why is this? I can't find anything in the documentation about this.
The objects that result from these casts can have properties set on and read from them. It's as if the cast created information, or removed whatever special information the null and undefined values have. But there's no indication in the AS3 documentation that the null and undefined special types are actually objects.
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Sep 5, 2009
I am trying to add an EventListener to a MC, but I am getting the 1009 error. My script is referencing a MC that does exist. I have verified that my code is typed correctly, and that my instance names are correct.I am creating a portfolio site. On the first frame I have my main navigation (well, it's actually not the first frame. I alpha-fade everything in so it's really the 6th or 7th, but I'm not sure how pertinent that is). The main navigation works fine (5 movie clips, fyi). Clicking them will move to a different frame, and the information and sub navigation for the frame will fade up. It is the sub navigation that I am having trouble with.[code]
As you can see, it doesn't even get to the function before it gets thrown off. I have verified that the instance names are correct. The script and the MC I am trying to add it too [I/]are[I/] in the same frame, which is what's stumping me. Normally you get 1009 when the object you're trying to reference is not there, but mine is!!Obviously there is something wrong with my EventListener. I am not sure what else do; there is a gap in my understanding of AS.
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May 29, 2010
I have a website with a homepage in which I have a movieclip called "menutopmc" which, as the name says, is a menu on top of the stage and it is an MC as instance. Inside this mc I have 5other mcs and each of them works as button.On the stage I have an other mc called "website" in which I load the several pages of the website.Here is some code to understand better what I'm doing:code on the main stage where I automatically load an swf when the website loads:
ActionScript Code:
stop();
var websiteRequest:URLRequest = new URLRequest("azienda.swf");
[code]...
and here is the code I have inside the mc menutopmc in order to change the child previously loaded on the stage:
ActionScript Code:
function btn_content(eventObject:MouseEvent):void {
MovieClip(parent).website.removeChild(websiteLoader);
[code]...
Now, the new addChild in the function btn_content works and it loads the new child on stage but the removeChild doesn't work and this is the error I get:
1120: Access of undefined property websiteLoader.
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Nov 2, 2008
If I add a movieclip to the stage like this:
Code:
var feedbackBox_mc:feedbackBox = new feedbackBox;
feedbackBox_mc.x = 807;
[code].....
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