Re: [Flashcoders] Re: AS2 vs. AS3: instantiate library symbols with a loop & string concatenation
Thanks to everyone who chimed in with the answer!
Seems like there is a little disagreement between getDefinitionByName and
getClassByName.
>From some basic searches it looks like getClassByName has been replaced by
getDefinitionByName, and I could only find
flash.utils.getDefinitionByNamein the Adobe LiveDocs.
Either way, thanks for those who helped - I didn't quite know where to loock
in my trusty moock.
-jonathan
On Tue, Mar 4, 2008 at 4:31 PM, Cory Petosky <[EMAIL PROTECTED]>
wrote:
> import flash.utils.getDefinitionByName;
>
> for (var i:uint = 0; i < 30; ++i) {
> var sym:MovieClip = new (getDefinitionByName("sym" + i) as Class)();
>
> // rest
> }
>
> On 3/4/08, jonathan howe <[EMAIL PROTECTED]> wrote:
> > Sorry - somehow triggered the send mail hotkey before I was finished:
> >
> > On Tue, Mar 4, 2008 at 3:25 PM, jonathan howe <[EMAIL PROTECTED]>
> > wrote:
> >
> >
> > >
> > >
> > > Imagine I have in my library a series of MovieClips with linkage
> > > identifiers like so:
> > >
> > > sym0
> > > sym1
> > > sym2
> > > ...
> > > sym29
> > >
> > > In AS2, if I wanted to create instances of each one (or perhaps
> decide
> > > which symbol to use based on XML data, for example), I could use a
> for loop:
> > >
> > > for (var i:Number = 0; i < 30; i ++) {
> > > var new_mc:MovieClip = parent_mc.attachMovie("sym" + i, "sym" +
> i, i);
> > > // do stuff with clip
> > > }
> > >
> > > and create each symbol via passing a concatenated string as
> symbolName.
> > >
> > > Now, in AS3, I can't think of a way to do this efficiently. In our
> simple
> > > example, I can only think of the following:
> > >
> > > for (var i:int = 0; i < 30; i ++) {
> > > var sym:MovieClip;
> > > switch (i) {
> > > case 0: sym = new sym0();
> >
> > > case 1:sym = new sym1();
> > > case 2: sym =new sym2();
> >
> > > ...
> > > }
> > > // do stuff with clip
> > > }
> > >
> > >
> > > Is there a more efficient way to do this in AS3? You can't really
> > > instantiate a class based on a stringname, can you?
> > >
> >
> > Was I doing myself a disservice by using this technique in AS2 anyway?
> > >
> >
> > Thanks,
> >
> > -jonathan
> >
> > ___
> > Flashcoders mailing list
> > Flashcoders@chattyfig.figleaf.com
> > http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
> >
>
>
> --
> Cory Petosky : Lead Developer : PUNY
> 1618 Central Ave NE Suite 130
> Minneapolis, MN 55413
> Office: 612.216.3924
> Mobile: 240.422.9652
> Fax: 612.605.9216
> http://www.punyentertainment.com
> ___
> Flashcoders mailing list
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> http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
>
--
-jonathan howe :: 404.434.2321 :: 180 High St Apt 26 Portland, ME 04101
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Re: [Flashcoders] Re: AS2 vs. AS3: instantiate library symbols with a loop & string concatenation
import flash.utils.getDefinitionByName;
for (var i:uint = 0; i < 30; ++i) {
var sym:MovieClip = new (getDefinitionByName("sym" + i) as Class)();
// rest
}
On 3/4/08, jonathan howe <[EMAIL PROTECTED]> wrote:
> Sorry - somehow triggered the send mail hotkey before I was finished:
>
> On Tue, Mar 4, 2008 at 3:25 PM, jonathan howe <[EMAIL PROTECTED]>
> wrote:
>
>
> >
> >
> > Imagine I have in my library a series of MovieClips with linkage
> > identifiers like so:
> >
> > sym0
> > sym1
> > sym2
> > ...
> > sym29
> >
> > In AS2, if I wanted to create instances of each one (or perhaps decide
> > which symbol to use based on XML data, for example), I could use a for
> loop:
> >
> > for (var i:Number = 0; i < 30; i ++) {
> > var new_mc:MovieClip = parent_mc.attachMovie("sym" + i, "sym" + i, i);
> > // do stuff with clip
> > }
> >
> > and create each symbol via passing a concatenated string as symbolName.
> >
> > Now, in AS3, I can't think of a way to do this efficiently. In our simple
> > example, I can only think of the following:
> >
> > for (var i:int = 0; i < 30; i ++) {
> > var sym:MovieClip;
> > switch (i) {
> > case 0: sym = new sym0();
>
> > case 1:sym = new sym1();
> > case 2: sym =new sym2();
>
> > ...
> > }
> > // do stuff with clip
> > }
> >
> >
> > Is there a more efficient way to do this in AS3? You can't really
> > instantiate a class based on a stringname, can you?
> >
>
> Was I doing myself a disservice by using this technique in AS2 anyway?
> >
>
> Thanks,
>
> -jonathan
>
> ___
> Flashcoders mailing list
> Flashcoders@chattyfig.figleaf.com
> http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
>
--
Cory Petosky : Lead Developer : PUNY
1618 Central Ave NE Suite 130
Minneapolis, MN 55413
Office: 612.216.3924
Mobile: 240.422.9652
Fax: 612.605.9216
http://www.punyentertainment.com
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Re: [Flashcoders] Re: AS2 vs. AS3: instantiate library symbols with a loop & string concatenation
Hi Jonathon,
Your AS2 method is tried and true. Here's the new and improved AS3 way
of doing it.
for (var i:Number = 0; i < 30; i ++) {
// build the String name
var symbol:String = "sym" + i;
// locate the class
var symbolClass:Class = getDefinitionByName(symbol) as Class;
// instantiate the clip using the class
var new_mc:MovieClip = new symbolClass() as MovieClip;
// add clip to stage
addChild(new_mc);
// do stuff with clip
}
You may or may not need the " as MovieClip" bit on the instantiation,
depending on how your class is actually defined.
hth,
Bob
jonathan howe wrote:
Sorry - somehow triggered the send mail hotkey before I was finished:
On Tue, Mar 4, 2008 at 3:25 PM, jonathan howe <[EMAIL PROTECTED]>
wrote:
Imagine I have in my library a series of MovieClips with linkage
identifiers like so:
sym0
sym1
sym2
...
sym29
In AS2, if I wanted to create instances of each one (or perhaps decide
which symbol to use based on XML data, for example), I could use a for loop:
for (var i:Number = 0; i < 30; i ++) {
var new_mc:MovieClip = parent_mc.attachMovie("sym" + i, "sym" + i, i);
// do stuff with clip
}
and create each symbol via passing a concatenated string as symbolName.
Now, in AS3, I can't think of a way to do this efficiently. In our simple
example, I can only think of the following:
for (var i:int = 0; i < 30; i ++) {
var sym:MovieClip;
switch (i) {
case 0: sym = new sym0();
case 1:sym = new sym1();
case 2: sym =new sym2();
...
}
// do stuff with clip
}
Is there a more efficient way to do this in AS3? You can't really
instantiate a class based on a stringname, can you?
Was I doing myself a disservice by using this technique in AS2 anyway?
Thanks,
-jonathan
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--
Thanks,
~
Bob Leisle
Headsprout Software & Engineering
http://www.headsprout.com
Where kids learn to read!
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