ActionScript 3.0 :: Checking If A Child Exists?
Feb 8, 2009
My page has 2 tab menus. When the page first loads, it defaults to the first tab, but when the second tab is hit, an image is loaded to the stage. I want to remove the image from the stage once the first tab is hit again.I keep getting the error "Access of undefined property Image1" but the whole point is to check if this child exists with the if statement.
//Tab 1
if (Image1 != undefined) {
stage.removeChild(Image1);
[code]....
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Jan 4, 2011
i have a function as following:
private function seatClickHandler(e:MouseEvent):void{
var check:Check = new Check();
if(e.target.contains(check)){
[code]........
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Sep 18, 2011
I am trying to check if a MC is on the screen but it says: 1120: Access of undefined property newBullet.
The code that is giving the error is in engine.as
Code:
if(stage.getChildByName(newBullet)) {newBullet.y = gtip.y;
newBullet.x = gtip.x;
}
gtip is an instance name of a movie clip that is in the character when it gets loaded.Here is the code from the files;
Engine.as
Code:
package code {
import flash.display.MovieClip;
import flash.display.Stage;[code]...
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May 26, 2009
I have a gallery loading jpegs from an xml file into a mc called mainPicArea, on frame 5. I have other content on frames 1,2,3,4,6,7.
I want to run an if statement to check whether mainPicAreaexists and if it does, then run a removeChild(mainPicArea), and if not do nothing.
[AS]
if (MovieClip.mainPicArea){
trace("exists");
//removeChild(mainPicArea);
[code]....
When I test, it comes back with the trace "doesent exist", even though it does exist.
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Feb 15, 2010
I have a gallery loading jpegs from an xml file into a mc called mainPicArea, on frame 5. I have other content on frames 1,2,3,4,6,7.I want to run an if statement to check whether mainPicAreaexists and if it does, then run a removeChild(mainPicArea), and if not do nothing.
code:
if (MovieClip.mainPicArea){
trace("exists");
//removeChild(mainPicArea);
[code]....
this is my code. When I test, it comes back with the trace "doesent exist", even though it does exist.
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Aug 6, 2010
In my script I create a button that when clicked, creates a blue square. However, I want to remove any blue squares that exist before creating the new square (because as it is a low opacity square creating another one will make it more solid, as well it's just more objects that the system has to keep track of).Here is my code:.as
ActionScript Code:
package{
//importing required classes for this to work
[code].....
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Jul 25, 2009
I´m trying to check if one xml element has a child-element or not, i´ve tried things like if(myxml.doubtelement != null) ; if(myxml.doubtelement != undefined) ; and if(myxml.doubtelement != 'undefined') wich where the solutions i found in forums... but they don´t work at all. i´ve been looking at the xml methods and i found contains() method, but I found out that it works with the element content and not with the node itself.
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Jul 12, 2007
How would you check if a file on a server exists and if not, check XX Times l8er again til ya find it and then go ahead with the script ..
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Aug 13, 2007
My situation is thus: I have an XML file with entries, each of which contains a handle (linkage ID) to the movie clip that represents that entry onstage. So I dynamically load these symbols in from the library accordingly. Only problem is, I need to be able to count how many of those entries are valid, that is, how many of the XML entries have handles that actually do correctly correspond to the names of the symbols in the library. So right now in order to count the entries I am using the value of how many entries were in the XML file but this is wrong, I need a value of how many entries in the XML correspond correctly to a library symbol.
As it stands now, if all the names in the XML file match those in the .fla, all is good. Otherwise, issues. The thing is, I want this setup to be robust so the program takes responsibility and resolves issues if there are errors in the XML. Now, the only way I can see to fixing this simply, is if there is a way to check if a symbol exists in the library -- without actually trying to load it. That way I can count just those symbols from the XML file that also do exist in the library.
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Jun 11, 2009
in AS3 to check if a file exists before loading it. There was not very much about so I wrote these classes to do it. There are two classes, the FileLoaderUtils and the UtilEvent. the FileLoaderUtils has the function doesFileExist(url:String) and when called the class uses the URLStream class to attempt to load the file. If the file exists a UtilEvent.FILE_EXISTS event is dispatched. If the URL is incorrect or the file doesn not exist a UtilEvent.FILE_NOT_FOUND event is dispatched.
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Feb 10, 2010
I have a name for the object, but it doesn't seem to work.Anyone know why this doesn't work?
Code:
if (sprite) {
removeChild(sprite);
[code]......
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Oct 12, 2005
Is there any way to check if an external sound file exists? I've searched the net and found stuff on checking if files exist using LoadVars. But it doesnt work for sound.
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Apr 21, 2003
You all know the "loadMovie" command but is there a way to tell if the movie you want to load really exists? For example: I have a movie on my server names "asdf.swf" and I want to use loadMovie to open it. Well what If I want it to check if it exists before I try to load it? Also, can you load picture files to a movie? (gif/png)
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Nov 28, 2011
I'm attempting to make a platform game. Each level is contained within it's own MovieClip, which has it's own class. Each of these classes extend the Level class, which provides basic functionality for all levels.
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[Code]....
Is there any way to check if a variable exists within a MoveClip? I've trying comparing it to null and also to undefined, but neither works.
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Dec 6, 2009
I have a form that is being created at the point the user clicks on. The algorithm is checking to see if a form exists in the same spot- if it doesnt, new object is created, if it does- result is traced. If no objects are on the stage- a new object is added. For some reason in this code- I get no results for the Mouse_Down event on the form itself. Method being called in main timeline:
[Code]...
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Mar 19, 2012
I have an event driven flash program. I need to be able to call removeChild() if and only if an object is a child. getChildByName() and most other functions don't seem to allow for this and if you call removeChild() on an object that isn't a child it will throw an error. I suppose an option may be to catch the thrown error and just ignore it, but that seems like a bad solution.
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Mar 15, 2010
I have a external movie loaded to as a movie clip with the name "loadedMovie"
when I remove the child with[code]...
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Mar 9, 2010
I m making a basic menu effect. Normally I would animate all this in flash on the timeline but im trying to learn as much as i can about coding. I was actually impressed that i was able to create just this simple animation, but i want to write a conditional that lets me see if a child exists on the stage, if so remove it, if not run a function. Heres where I am so far.[code]as you can see the hardware text drops down and comes in from the top but stays on screen when you mouse out.basically what i want to do in my hardwareOut function is to run a conditional to see if topText exists, if so remove it and if not then gotoAndPlay().
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Feb 28, 2011
I have been through many threads and none have helped. I am trying to remove a child if it exists. I am clicking on the button and sometimes there is no other child loaded. I want some code that looks to see if a child is loaded and then if so unloads. There are going to be at lease 5 possible .swf files loaded. [code]
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Mar 3, 2009
I'd like to remove a child of the display list if it exists before adding another to the stage. This gives me Error the first time I call it because 'myMC' doesn't exist.
HTML Code:
function callMc(){
if(myMc) removeChild(myMc);
[Code]....
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Oct 9, 2009
I'm working on building a gallery, but I've run into a slight snag. The full-size images are not all the same size, so they will overlap when loaded. In the showPicture function, is there a way for it to check to make sure there isn't a full-size image already loaded, and if there is, to remove it before adding the new one?
var imageLoader:Loader;var xml:XML;//parse XML data as an arrayvar xmlList:XMLList;var xmlLoader:URLLoader = new URLLoader();xmlLoader.load(new URLRequest("data/gallery.xml"));xmlLoader.addEventListener(Event.COMPLETE,
[code].....
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Jun 23, 2011
I have a component "child" which has a cancel button. Now this component is placed in a state called "newChildComp" I also have another component called "parent". In the parent component, i have a button that dispatches an event. Here is the event code:
[Code].....
so, basically,i am checking to see if the cancel button component in the Child component, while i am still in the parent Compoent, was clicked, if it was clicked, call the cancelButtonHandler. The problem is by the time the addNewChild handles the event, that cancel button was still null. My question is how do i solve this without using the itemCreationPolicy on the cancel button?
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Mar 25, 2009
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Jun 9, 2011
I would like to know, how to find weather the file exist or not. Other than loadvar method is there any other method is available.
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Jul 6, 2011
How do I know that the moviecilp exists or not by as3 ?
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Sep 8, 2009
Is there a way to see if a class exists? something like:
if( MyClass exist in the Library or has been imported in to the class ){
var myClass = new MyClass()
addChild(myClass);
}else{
trace("MyClass doesn't exist")
}
I'm not trying to see if it exists on the stage just want to know if I have access to it.
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Feb 29, 2004
Im gonna make an image gallery that loads thumbnails 1.jpg, 2.jpg 3.jpg..etc... into thumbnail mc's it creates, and when it gets to a number of a file that doesnt exist i want it to stop making thumbnail mc's. What AS could i use. As of right now it trys to load the jpg that doesnt exist and the preloader keeps going forever.
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Aug 23, 2010
i have problem with swfLoader in flex, when i close following code in click method i can easly add many swf to main application
<mx:VBox id="content" width="100%" height="100%" ></mx:VBox>
public function doIT():void
{[code]....
when i close adding those swfs in loop i have the same error, it looks like child apps couldn't access certain objects that were instantiated by another child app, so what can i do?
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Aug 18, 2010
I have a movieClip with one frame on the timeline containing one child whose instance name is "myContent"I am using this function to swap "myContent" with any number of possible class instances.
Code:
function setContentAsClass(c:Class)
{
[code].....
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Mar 19, 2011
I've used this site as a resource leading up to this, not particularly sure if I worded this correctly I have a class "Block" which is just a square (will be something else later on in the process) I want each block to have controls to add an additional block in either direction so I have another class BlockButtons which has my buttons for each direction.
And another class GlobalVar where I keep all my variables for funsies
[Code]...
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