ActionScript 3.0 :: Accessing Null Object - IDE Compiler Output
May 11, 2009
Out of good programming practice, I generally check for null displayobjects before trying to access a method or property of said object. Ive noticed that the IDE compiler output will bark at you if you do not check for nulls (while trying to access a null object), but it will continue to run unphased. It also doesnt show any errors in the flash player while trying to run it in a browser. So I guess my question is, what exactly happens when you try to access a null object? from what its showing me it doesn't cause any memory problems, doesn't crash the app, and it only displays an error if I am in the flash ide.
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Apr 24, 2010
Working on a project and get this error on the Output Log TypeError: Error #1009: Cannot access a property or method of a null object reference. at FlashSite_fla::MainTimeline/frame16() Here's every frame that is on, begins, or crosses frame 16
[Code]...
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May 31, 2009
I have problem with accessing object created by function imported from another package.
I have 2 packages DragDrop and UserInterface. In UserInterface I create methods for buttons and later add them in DragDrop . I make it in two different ways:
One(this one works):
[Code]....
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Feb 15, 2011
I don't understand the "heirarchy" of Flash Output Error Messages. For example: TypeError: Error #1009: Cannot access a property or method of a null object reference.
[Code]...
This error shows when I preview a SWF that calls en external swf. All the code listed in the Error Codes is contained in the external swf. In the TypeError -- where do I look for the problem code? bBrand_Gallery is a class description for the externally called swf. The externally called swf runs fine by itself. All functions in the package are declared as public functions. I know that the null object reference means that it's looking for the property of an object that is not yet instantiated. How do I find that object? Would it most likely be a variable that is not delacred publicly?
I believe the ArgumentError has to do with the fact that the DisplayObject in question is not "created" by the function startShow which includes the removeChild statement. How do I resolve that issue?? Is there a reference as to the best way to interpret these error messages?
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May 2, 2010
I'm trying to use a relative path in the -output compiler argument, here's what I've tried (with and without quotes):
-o="./deploy/file.swf"
-o="/./deploy/file.swf"
-o="./file.swf"
[code].....
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May 27, 2011
In my current flash project I keep getting this error in my output panel: Code:TypeError: Error #1010: A term is undefined and has no properties.at main_flash_fla::Acoustic_1/moveImage()at main_flash_fla::Acoustic_1/on2() However, It does not seem to effect the movie when I test it. All it has really accomplished is to annoy me by always popping up in my output panel.
Heres my question: Why does it choose to show up in my output as an error rather than my compiler error panel? Also, what then is the difference between an error in output vs compiler?
[Code]...
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Nov 13, 2009
I have a simple bar preloader in frame 1 of a main timeline
stop();
addEventListener(Event.ENTER_FRAME, loading);
function loading(event:Event) {
var bytestotal = stage.loaderInfo.bytesTotal;
var bytesloaded = stage.loaderInfo.bytesLoaded;
var sclbar = Math.round(bytesloaded*100/bytestotal);
[Code]...
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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 10, 2011
I did a separate levelData class to be able to flexibly add levels. I was happy with it until my supervisor ordered me to convert my levelData into XML. I did an XML version of the levelData's data (question, answers, correct answer...). I used the old class and converted it so that it fetches the XML.
All seems well, I did traces of my answers array and it printed nicely...
But the headache started when I tried this.
// This code appears in a different class with
// currentLvl:LevelData initialized in the constructor.
quizHolder.ansA.ansHud.text = currentLvl.choices[1];
[Code].....
LevelData Class in PasteBin: [URL]
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Feb 22, 2011
I have an object which is assigned a number of properties:
var project_array:Array = [];
var slideObject:Object = {
project_title : myXML.projects.project[i].title.toUpperCase(),
[Code].....
but I'm not quite sure where to place this. If I place it outside of the object constructor, I get "term is undefined", I guess because it doesn't know what project_clips_array is - but if I declare project_clips_array in the constructor, it appears to need to be defined, i.e. I can't create a blank property. But I can't place it in the constructor either, because it doesn't seem to allow me to run a function within an object constructor. What is the proper syntax or arrangement of code for executing this function to get the array within the object?
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Jul 23, 2011
i am trying to access an object within a class and the object is comming up as null but i dont understand why.
this is the object:
btnLMain = new MovieClip(); //variable declared earlier in code
btnLMain.name = "btnLMain";
[Code].....
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Aug 5, 2011
Its stated in adobe site that the Flash Builder 4 compiler is indeed 25% more performing than the previous Flex Builder 3 compiler.
How can I confirm that?
For example if I make a simple application on Fx3 and the same on Fx4, then how would I compare the compiler performance using my project?
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Aug 22, 2011
I have one MXML File as
<objecthandles:ObjectHandles xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" backgroundAlpha="1" xmlns:mx="library://ns.adobe.com/flex/mx"
[code].....
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Jul 23, 2011
i am trying to access an object within a class and the object is comming up as null but i dont understand why.this is the object:
btnLMain = new MovieClip(); //variable declared earlier in code
btnLMain.name = "btnLMain";
btnLMain.clickNum = 0;
addChild(btnLMain);
this was created in the class: LanguageButton. here is how i declared the above class within the class i am trying to instantiate it:
var btnL:LanguageButton;
then i try to access the btnLMain from the LanguageButton Class and it, (btnLMain) is comming out null:
btnL = new LanguageButton(cssLoader);
main.addChild(btnL);
btnL.btnLMain.addEventListener(MouseEvent.CLICK, btnLClick);
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Apr 2, 2010
I have an xml say in following format
[Code].....
What I should do is parse an xml and from its node name create object property and then create an object array based on those property. Am I able to make myself clear.
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Nov 7, 2009
I have 2 classes, Display holds the currently selected Component:
public class Display
{
public static var selectedComponent:Component;
}
Component has an ID string and the selectedComponent variable is set on click:
public class Component extends MovieClip
{
public var id:String;
addEventListener(MouseEvent.CLICK, function() {
[Code]...
Removing the selectedComponent variable type so it reads public static var selectedComponent; removes the conversion error and seems to change the ID variable but it appears to only be a copy of the object.
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Sep 2, 2003
I'm trying to output a loadVars object to string, and it works just fine and dandy, except it goes a little something like this:
the variable is: start.ADDR_ORIGIN
the outputted variable name is: ADDR%5FORIGIN
The server-side script I'm sending the string to doesn't like that one bit, and said it would phone my momma if I keep doing it..
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Dec 16, 2011
This includes some code and some traced output. I've been looking at this for 2 days and it stupifies me. I'll elaborate: There is a game object, its a dictionary object containing a screen tile with index/name tile_x_y So i can look it up using the x and y coords. The object contains lost of stuff but in this case especially: x, y , width, height, xtile, ytile (self explanatory i assume) & xmove, ymove (-1,0,1 depending on direction.)
So, now these objects move around the screen (yes its just a game) and check if they hit the screen bounds and if they try to move onto tiles that are occupied/non traversable. It goes fine for most objects but sometimes, or for some objects (no clue why and it changes on restart), halfway the boundaries check, the object internal x and y values go ballistic and i end up with a reference error on the dictionary object because tile 280 30 just doesnt exist.
[Code]...
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Aug 27, 2009
Well this is strange:
ActionScript Code:
var myObject:Object = {firstName:"Alf", age:34, city:"Oslo"};
for (var prop in myObject) {
trace("myObject."+prop+" = "+myObject[prop]);
}
This will output all the properties of the object, but if I make my own class object it doesnt work at all! Simple.as:
[Code]...
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Jul 20, 2011
I'm just starting with OOP in AS3 so apologies if this question is too simple...The goal of this script is to have a button change it's own features (colour and transparency) and change the alpha value of a loaded picture.There are 27 buttons for 27 (stacked) pictures.In the fla is the following code:[code]When I try to access the picture (= portrait class and the test_portrait var in the fla) it can't be found. The object and the loader have for example this path when I debug: Movie Clip: Frame=0 Target="_level0.p_4.l_4. But when I do trace(getChildByName("p_"+tmp_name)); in the P_button class it returns null. Doing the same trace from the fla returns: [object Portrait] Why can't I access it from the P_button class?
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Nov 20, 2009
I'm quite new to AS3 (coming from php/c#) and like it very much. My problem: trace doesn't output anything in the Output window anymore?!
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Nov 20, 2009
I'm quite new to AS3 (coming from php/c#) and like it very much.My problem: trace doesn't output anything in the Output window anymore?!
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Sep 14, 2009
I am getting this error, randomly when I start my application (and it's sub applications). As you can see the stack trace is rather useless, although through the debugger I can see the parent of container (second in the stack) is an MXML class that has a repeater that repeats another component. Therefore I guess the component with the problem is that repeated component, although I am unsure what I can change to stop this from happening. If anyone can give me some insight to the FocusManager or the getFocus() function it would be really handy.[code]
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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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Aug 20, 2011
I'm creating a movie clip button and for the out state I have this:
web_btn.addEventListener(MouseEvent.MOUSE_OUT, at_out);
function at_out(event:MouseEvent):void {
web_btn.gotoAndPlay(30-(web_btn.currentFrame-11));
[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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