ActionScript 3.0 :: Check If The Value Returned Is A Null Object Reference?
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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Aug 3, 2011
I have a weird problem. An Object is being passed to my function, and some parameters are optional, so naturally I would check to see if they are there, and if not, do nothing.However, I'm getting a null reference error (#1009) when I'm just checking it. Here's the sample:
public function parseObject(params:Object) {
if (params.optionalParam)
trace("Got Optional Parameter!");
[code]......
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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"
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Aug 20, 2011
I'm creating a movie clip button and for the out state I have this:
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[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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Oct 28, 2009
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(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":
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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]......
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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
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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:
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Apr 20, 2010
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at Untitled_fla::MainTimeline/frame2()
at flash.display::MovieClip/gotoAndPlay()
at Untitled_fla::MainTimeline/buttonClick1()
[code].....
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May 13, 2010
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[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
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public class LuckyHitBeta extends MovieClip {
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private function liveIcon():void {
[code].....
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Dec 8, 2010
I am just trying to watch television episodes on my laptop. this error has been popping up for the last couple weeks for no apparent reason. At first, it also said the Flash Player didn't work with 64 bit whatever with IE8. The error said a patch was not yet made and to use IE 32 bit. I did this and am still getting the error. I have uninstalled flash player and reinstallaed it to no avail. This error led to further problems on my laptop resulting in a total crash. Fortunately, I was able to back up all my files before they disappeared. I restored the computer to a time before I started watching television programs on XFinity.com (about a couple months ago) and it seemed corrected for a while and then the error started again. I am given the option to continue or dismiss. either button allows me to continue watching the program, but then repeatedly appears even when I quit XFinity and watch the shows directly from the network websites.
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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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Jan 25, 2012
I am implementing the below code but it throws the null object reference at line number 4. Text input has also been created but don't understand why its showing null object ref. error.
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Feb 12, 2012
We are supposed to build a game, and each of us is to make a level. So we did, but integrating them is giving me issues. Specifically, each of our levels are contained within a symbol. I personally have a ton of symbols that point to eachother already (main.as, menu with various elements, level one, boss level) but for whatever reason whenever I try and addChild my partner's level it gives me "TypeError: Error #1009: Cannot access a property or method of a null object reference."
the way I've been doing it looks like:
var levelTwo:SkiHill = new SkiHill();
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like I said, it's worked every time Ive used it between my own things. My partner's is a no-go. If I just slap his level on the stage and go it runs fine, and it will properly add/remove child to transition to one of my levels.
All I can think of is that I've checked all the names. I also noticed my partner didn't use an ADDED_TO_STAGE event listener, but adding that didn't help at all.
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Aug 10, 2010
I want a typewriter-effect. So that it looks like the code in the string is typed character by character (for an animation). However, I get a #1009 back. It talks about a null object reference (the error is in Dutch).My dynamic text field is in the same scene, on a different layer. codeTekst is the instance name. It is classic, dynamic text. Multiline behaviour and not embedded in a symbol. I'm using Flash CS5. Here is my code:
import flash.utils.Timer;
import flash.events.TimerEvent;[ code].........
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Jun 21, 2011
I have function init, which runs on the creationComplete of the application. The init calls get_login_share_object funtion, in which objects are created, which are null.
Now my problem is that, I get a null object reference error on the Alert in "init()". How can I avoid that. Is it possible that I can have a check to see, if the objects are null the program should just skip reading the objects.
private function init():void
{
var stored_credentials:Object = get_login_share_object();
[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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Dec 3, 2011
I have a Android Air application, where I import a png image to the stage on frame two and converted it to a symbol as a movieclip. I am performing a hovering animation using this image as a movieclip and it works great but when I go from frame 2, where the animation is, and I move to frame 3, 4, 5, or 6, and then I move back to frame 2, my application throws a errors when referencing the movieclip again. The error is 1009 cannot access null object reference. So to me it seems that once the timeline moves away from frame 2 it wipes away the reference to the imported image converted to a movieclip....is this correct? Is there a way I can keep the timeline referencing the this image as a movieclip so I can always come back to this frame?
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Dec 19, 2011
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]....
Runtime error:
TypeError: Error #1009: Cannot access a property or method of a null object reference.
at LuckyHitBeta/onEnterFrm()
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Feb 8, 2010
i used some variable, which was not initialized properly. I got a runtime error related to Null Object Reference.It was a hell, to find out, which variable was it pointing to. Cannot it be more informative, if it says, on which particular variable ( or bunch of variables), did the compiler found the null object reference. Or atleast provide me the lineNumber/linenumbers where it find the null object.The informationlessness becomes more hell, when there is more than one line, in which such null objects are used. It's hard to determine, if the line removed currently was a correct attempt or wrong attempt towords debugging the code.
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