Re: [Flashcoders] Why doesn't this work addChild removechild
On 22/04/2011 18:35, Steve Abaffy wrote:
Quick update
Function{
Var Mort: MovieClip = new Mort();
Try{
removeChild(Mort);
}catch(e:Error){
// Do nothing;
}
addChild(Mort);
}
This function is called multiple times and each time it adds the child Mort,
but I want to remove the one placed there previously, it works if I add the
two lines right after each other as in the previous email but I really need
it work more like this.
As has already been pointed out, your variable name is the same as the
class name, so I'm not sure why the compiler doesn't throw wobbly.
Never name instance variables beginning with a capital letter.
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[Flashcoders] Why doesn't this work addChild() removeChild()
Hello, Why doesn't this work?? In the same function Var Mort:movieClip = new Mort(); addChild(Mort); removeChild(Mort); I get this error The supplied DisplayObject must be a child of the caller. ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
Re: [Flashcoders] Why doesn't this work addChild() removeChild()
Hi Steve, This is because of timing. You are trying to remove an object which has not completed its addChild actions. Hence its not getting the instance when removing. Warm Regards Deepanjan Das W: http://deepanjandas.wordpress.com || Om Manasamarthadata Shri Aniruddhaya Namah ||http://www.manasamarthyadata.com/ *Think of the environment before printing this email __ * On Fri, Apr 22, 2011 at 10:47 PM, Steve Abaffy st...@msmarketing.bizwrote: Hello, Why doesn't this work?? In the same function Var Mort:movieClip = new Mort(); addChild(Mort); removeChild(Mort); I get this error The supplied DisplayObject must be a child of the caller. ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders ___ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
Re: [Flashcoders] Why doesn't this work addChild() removeChild()
Steve Abaffy wrote:
Why doesn't this work??
In the same function
Var Mort:movieClip = new Mort();
addChild(Mort);
removeChild(Mort);
I get this error
The supplied DisplayObject must be a child of the caller.
It's likely that Mort hasn't had time to instantiate. Either that, or Mort,
being a local variable, isn't there if you leave the function and call it
again. For example:
public function doMort(add:Boolean):void
{
var Mort:MovieClip;
if (add == true)
{
Mort = new Mort();
addChild(Mort);
}
else
{
removeChild(Mort);
}
}
Mort only survives while the function is running. He's still on the display
list, but the function doesn't know who Mort is when you call him with
false.
Or, it could be something as simple as using an upper-case Var instead of
var.
Have you looked in the debugger, or with trace statements, to be sure Mort
is being created? If instantiation fails, it won't be a valid MC.
Cordially,
Kerry Thompson
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[Flashcoders] Why doesn't this work addChild removechild
Quick update
Function{
Var Mort: MovieClip = new Mort();
Try{
removeChild(Mort);
}catch(e:Error){
// Do nothing;
}
addChild(Mort);
}
This function is called multiple times and each time it adds the child Mort,
but I want to remove the one placed there previously, it works if I add the
two lines right after each other as in the previous email but I really need
it work more like this.
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RE: [Flashcoders] Why doesn't this work addChild() removeChild()
A couple of things:
1. Var should be lower-case var. You probably have it as var in your
code and your e-mail client capitalized it for you (or you mis-typed), but if
you want is to trouble-shoot, I would post it as it is in your code. If it is
Var in your code, it should throw a compiler error.
2. You are naming your instance name the same as the Class name Mort.
Instance names are also usually lower case, classes upper case, which helps to
prevent coding errors like this.
3. You are casting your instance as MovieClip when it is actually Mort.
Your Mort class may extend MovieClip, but it would be better to cast it as
Mort.
The following works for me:
import mortsPackage.Mort;
function createAndDestroyMortJustForFun():void
{
var mort:Mort = new Mort();
addChild(mort);
removeChild(mort);
}
createAndDestroyMortJustForFun();
Jason Merrill
Instructional Technology Architect
Bank of America Global Learning
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-Original Message-
From: flashcoders-boun...@chattyfig.figleaf.com
[mailto:flashcoders-boun...@chattyfig.figleaf.com] On Behalf Of Steve Abaffy
Sent: Friday, April 22, 2011 1:17 PM
To: 'Flash Coders List'
Subject: [Flashcoders] Why doesn't this work addChild() removeChild()
Hello,
Why doesn't this work??
In the same function
Var Mort:movieClip = new Mort();
addChild(Mort);
removeChild(Mort);
I get this error
The supplied DisplayObject must be a child of the caller.
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Re: [Flashcoders] Why doesn't this work addChild removechild
Steve Abaffy wrote:
Quick update
Function{
Var Mort: MovieClip = new Mort();
Try{
removeChild(Mort);
}catch(e:Error){
// Do nothing;
}
addChild(Mort);
}
This function is called multiple times and each time it adds the child
Mort,
but I want to remove the one placed there previously, it works if I add the
two lines right after each other as in the previous email but I really need
it work more like this.
You have a scope issue. Mort is a local variable, and is no longer there
when you call it the second time. Try moving it up so it's declared in the
class definition, and instantiated in the function.
You have a couple of other problems, too. You have a variable Mort and a
class Mort. You should really make the variable lower case mort, like Jason
suggested.
Also, if that is your entire function, you have other problems. Every time
you call it, you're creating a new Mort (in the variable declaration--var
Mort:MovieClip = new Mort();). That guarantees you that you won't have the
previously created Mort--you just wiped it out on the first line of the
function.
Work with the debugger, Steve. Set some break points, and look at the state
of the variables, follow the logic flow. You'll find you can solve problems
like this more quickly if you understand what's happening in your code.
Cordially,
Kerry Thompson
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