ActionScript 3.0 :: Null Reference From A Function?
Jan 30, 2012
I thought I understood this stuff by now; the objects within a function are onlyaccessible within that same function, unless you return it to whatever called the function.However I dont think that you can do that for a function called with an eventlistner, so I set up what I thought was a global variable and set its contents within the function, thinking that the contents would be accessible later:
ActionScript Code:
var bmpd:BitmapData;
var URLReq:URLRequest = new URLRequest("sample.jpg");
[code].....
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Jan 12, 2010
I got a small problem with a null object reference. The problem is that the function "menuClicked()" not seem to work that good. It works fine if I'm not running it in the cases in the "urlChange()" function. But when I do so I get this error. The urls works fine btw. But I need to run that function to get the right content added regarding to the selected menuitem.
TypeError: Error #1009: Cannot access a property or method of a null object reference.
at Main/menuClicked()
at Main/urlChange()
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at com.asual.swfaddress::SWFAddress$/_dispatchEvent()
[Code] .....
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Jan 11, 2010
I've basically got an MC (menu_mc) that is on the first frame of the main timeline. I want menu_mc to call functions on the main timeline depending on its status. When the function is successfully called, I want to move menu_mc, however I get a null object reference despite the object menu_mc being visible on the stage.
here is the menu.as code
Code:
package {
import flash.display.MovieClip;
import com.greensock.*;
import com.greensock.easing.*;
[code]...
As you can see from the commented out lines, I've tried doing the same thing with eventDispatcher, but have been unable to listen to the event from the main timeline.It seems as if the function is being called before menu_mc is placed on the stage, despite the ADDED_TO_STAGE eventListener.
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Jan 19, 2009
I'm having a hard time because of an "Error #1009:Cannot access a property or method of a null object reference" Iget everytime I try to run my Flash-movie. I've attached the codethat is contained in frame 1.The function bringUpEasyQuestion is defined on frame 2, alongwith other functions that are defined there. Now when I test themovie, I get this message:TypeError: Error #1009: Cannot access a property or method ofa null object reference.at MES_fla::MainTimeline/bringUpEasyQuestion()atMES_fla::MainTimeline/frame1()I've read that the Error1009-message means that you aretrying to access something that isn't there yet. And indeed, thebringUpEasyQuestion-function accesses objects that exist only onframe 2. But the first line of the function bringUpEasyQuestion isgotoAndStop(2);. The curious thing is that it works when i put thelast line of the code in frame one (the function callbringUpEasyQuestion(0);) on the first line
with the command gotoAndStop(2);?
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Aug 25, 2011
Simple to understand problem, hoping for similarly easy solution:When I type in my search query, I sometimes get the "Error #1009 Cannot access a property or method of a null object reference" on the dataField = new ArrayCollection(result.data); line.
AS3:
private function getSearch():void
{
[code].....
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Jun 4, 2009
I have a custom function that doesn't function correctly the first time the function executes it removes a textFiled from the display list without a problem but the second time that it executes it won't remove a diffrent textfield and I don't know why here is the code from the time the textField is added to the diplay list to where its deleted.Btw the function in question is being executed by a custom event listener.....the errors i receive are TypeError: Error #1009: Cannot access a property or method of a null object reference...Also note that i can remove the textField in question from any function other thatn the one the custom event executes.
PHP Code:
sendBtn.addEventListener(MouseEvent.CLICK, sendMsg0,false,0,true);
msgOut.addEventListener(KeyboardEvent.KEY_DOWN, sendMsg1,false,0,true);
comboBox.addEventListener(Event.CHANGE,chFontSize,false,0,true);[code]..........
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Jun 12, 2010
i am working on a project that has separate swf files serving as different sections (students, faculty, etc). for each section, on the first frame i have a combobox that lists the different values within that particular section. when a user clicks on the value, it takes them to the specific frame within that swf. there are two problems:
1. when the user selects a value, everything functions correctly but an error is thrown that says:
[Code]...
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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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Jan 12, 2010
I got a small problem with a null object reference The problem is that the function "menuClicked()" not seem to work that good. It works fine if i'm not running it in the cases in the "urlChange()" function. But when i do so i get this error and i just can't see what im doing wrong here. The urls works finw btw. But i need to run that function to get the right content added regarding to the selected menuitem. Someone who knows?
[Code]...
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Jul 9, 2009
I have a working MP3 player I did last year and I am re doing one using classes. So i am coping and pasting code, changing what needs changed and I can not figure out why it works on the other one, but not here.I am getting the error: Cannot access a null reference.. so its not finding something. I traced out what I have and found out that its not getting passed the function playSong(). When the play button is pressed, it fires off playSong(); From there, it SHOULD fire off soundCompleteHandler(); Its not making it to the soundCompleteHandler();[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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Oct 9, 2010
On the stage there's an empty clip called mc1in the library there's a clip called with the class name Ballnow every frame this functions is executed:mc1.addChild(new Ball())inside ball, at frame ten:this.parent.removeChild(this)so this creates a bunch of balls on the stage, but after a while this error shows up:TypeError: Error #1009: Cannot access a property or method of a null object reference.t Ball/frame10()Edit: ok by tracing Ball's name I understand that even though the Ball is removed it continues to exist somewhere?
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Sep 11, 2010
Why does this code not work? It seems to make the error:#1009: Cannot access a property or method of a null object reference. my buttons on the same frame have all stopped working,
import flash.display.MovieClip;import fl.containers.ScrollPane;scrollpane.content as MovieClip;MovieClip(scrollpane.content).gotoAndSto p("frameName");
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Jul 4, 2009
from my documentclass i got a isntance of the my view class in there i got a instance of navigation class extends Sprite I got a utilz.as file with all static public functions like this one
alignToCenter(obj:DisplayObject):vid
{
obj.x = obj.stage.stageWidth/2;
}
Utilz.alignToCenter(instance of navigation class)
I get a error stage is null reference..
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Oct 28, 2009
I'm animating some mc's at the beginning of the timeline with AS3 (mostly alpha fades), but then I have some tweened animations further down the timeline and a "naviagation bar" that's on all frames, so a user can click a button and jump to a part of the timeline to see some other animations.My problem is that if I don't wait to see the programmed animations at the beginning and just clicka button to see the other tweened animations, I get an error:
"Error #1009: Cannot access a property or method of a null object reference. at flash_fla::MainTimeline/tube_glow2_animate()"
(tube_glow2_animate() being the name of a function)
[code].....
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Mar 27, 2010
My movieclips are being nulled when moving between scenes, they are created on the stage and accessed through as3. I have login screen with three button, one logout, one exits the system and the other takes them to the next scene. When going back to the login scene, and trying to access movieclips like add eventlisterners etc... it comes back with null object reference, claiming that my buttons which are on the stage are null and sure enough if I debug they are. Any reason why my movieclips are being made null when moving between scenes?
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Feb 7, 2011
I have a object called "target" with a property called "movement":
private function start() {
var movement:IMovement = new ZigZagMovement(target);
target.movement = movement;
[code]....
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May 29, 2009
Here is the error:TypeError: Error #1009: Cannot access a property or method of a null object reference.at mx.styles:: StyleProtoChain$/ initProtoChainForUIComponentStyleName()[C:autobuild3.2.0frameworksprojectsframeworksrcmxstylesStyleProtoChain.as:72][code]......
Maybe you could school me in how to keep null object references out of complex Classes?
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Apr 23, 2010
I've got an mx accordion component that I want to populate at runtime. However, the first box will populate fine, but all the others return null reference so I can't access them. Does this have something to do with which one is currently selected? I'm creating my accordion:
<mx:Accordion x="398" y="207" width="331" height="250" alpha="1.0" borderStyle="solid" borderThickness="0" cornerRadius="10" fontFamily="Arial" color="#000000">
<mx:VBox label="EDITOR'S NOTES" fontSize="10" width="100%" >
[code].....
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Aug 18, 2010
I have a test main.swf with just a UI loader component loading in an external .swfThe swf is a flash scroll using the component class. The swf works fine on its own but when used with the UI loader I get an null reference msg.The files have xml, .as and css files in the zip.light on why I get this reference as the scroll and text appear in the main.swf but the scroll does not function.
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Aug 26, 2010
I have a movieclip that I add to the stage and Im trying to reference a input text field on the second frame.When I trace the textfield on the first frame via the constructor it returns object textfield correctly.When I hit the enter button to go to the second frame where I will need to use password... I get a null when tracing. I can see it, I can write in it and no matter what I do I cannot seem to reference it.
Code:
public function Registration():void
{
trace(this.usernameField); //returns textfield correctly[code]...
In case you need the parent of registration its just the document class and I create registration like this..
Code:
var registration:Registration = new Registration();
addChild(registration); //ive also added it to the stage w/ no luck
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Sep 11, 2010
Why does this code not work? It seems to make the error:#1009: Cannot access a property or method of a null object reference. my buttons on the same frame have all stopped working
import flash.display.MovieClip;import fl.containers.ScrollPane;scrollpane.content as MovieClip;MovieClip(scrollpane.content).gotoAndSto p("frameName");
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Oct 7, 2010
I have this set of codes for a simple chat program using SharedObjects. When I run the program, I type my name into the 'chatName' box and my message in the 'textInput'box. However when click on the 'Send' button or press the Enter key, I am getting the following error:
[code]...
I am wondering how 'text_so' can be a null object reference. It was already instantantiated and setup earlier in the code. The relevant lines of code are below.Setting up of the shared object function
[code]...
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Feb 3, 2010
"Cannot access a property or method of a null object reference."I'm trying to get a button to go to a frame in my movie and stop. The code I am using is
Code:
btn1_btn.addEventListener(MouseEvent.MOUSE_DOWN, mouseDownHandler5);
function mouseDownHandler5(event:MouseEvent):void {
gotoAndStop(19);
}
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Apr 20, 2010
I have a slight problem. 3 scenes one named home , gallery and profile . 3 buttons each named after the scene. Whenever i test it and click a button to go to another scene i get this TypeError: Error #1009: Cannot access a property or method of a null object reference.
at Untitled_fla::MainTimeline/frame2()
at flash.display::MovieClip/gotoAndPlay()
at Untitled_fla::MainTimeline/buttonClick1()
[code].....
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May 13, 2010
I have been trying to design a maze game for college project but I seem to be stuck and hoping someone can help me out. Get error:1009: Cannot access a property or method of a null object reference.at code::Game1$iinit()New to flash so not sure what this means. [code]
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Jul 10, 2009
I have a form where a user can select up to three radio buttons and click submit. however if they don't select a radio from one of the groups (they dont care to answer the question or just missed it) the value of the radio button (I think) is null and gets returned as such using this code:
function Question1():Object{ return RadioButtonGroup(Q1R1.group).selection.value;}
Then, when they hit the submit button it sends the values to the database. This works fine, but only if they select a radio button for each group. If they missed one I get the following error:
"TypeError: Error #1009: Cannot access a property or method of a null object reference. at mid_fla::MainTimeline/Question1() at mid_fla::MainTimeline/clickHandler()"
When I did a trace on the value of Question1() it returns function Function() {}
how to check if the value returned is a null object reference or whatever and give it a default value if it is?
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Jul 15, 2009
Somehow my class is giving me the following error, after I added a SoundTransform object.What am I missing The issue is somewhere with the
private var soundTrans:SoundTransform;
soundTrans = new SoundTransform();
Why would that be happening?
[code].....
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Nov 1, 2009
well i have a problem with my analog clock. i have it in my homepage and now it's working fine, but when i test my movie and click in my portfolio, for example, my output windows gives me this error: TypeError: Error #1009: Cannot access a property or method of a null object reference. at index_fla::MainTimeline/clock() i don't understand because even when i change from page to page (or frames) the clock is still working and everything is ok... but the message keeps appearing till i close my test movie window... and i've noticed that when i go online, there are some files missing that weren't till i had the clock on my homepage.[code]
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Mar 8, 2010
I'm trying to trace the mouse X position with a movieclip.What I have done so far:
public class LuckyHitBeta extends MovieClip {
var ballReady:ballReady_mc;
private function liveIcon():void {
[code].....
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