Custom UI Components

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i have custom object need create instances of , add canvas in application.

the problem object contains child sprites , graphics. @ moment, object extends sprite, cannot add instances of application error #1034: type coercion failed (can't convert mx.core.iuicomponent).

can give me example of class creates instances containing child sprite graphics, added canvas?

see fb 2.0.1 topic:
defining spritearranger classes


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