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Flex mobile project does not support mx:Canvas?

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问题 In Flash Builder, if I new a Flex Mobile Project, and paste the following code: <?xml version="1.0"?>  <s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/mx"> <s:Group/> <mx:Canvas/> </s:Application> The "Canvas" line fails to compile. However it's OK in a Flex Project. My question is, is there any way to use Canvas or other halo

ActionScript MXML <mx:> vs <s:>

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问题 Looks like I can use components for both <mx:> or <s:> . So, which has more advantages? 回答1: As other posters have mentioned, the spark (s:) namespace refers to the new components introduced with Flex 4, while the halo/mx (mx:) namespace refers to the older components. They can be used together, which is necessary since there are not spark equivalents for all of the mx components (notable omissions are DataGrid, Tree, DividedBox, among others.) Some of the motivations for the new spark

ActionScript MXML <mx:> vs <s:>

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Looks like I can use components for both <mx:> or <s:> . So, which has more advantages? As other posters have mentioned, the spark (s:) namespace refers to the new components introduced with Flex 4, while the halo/mx (mx:) namespace refers to the older components. They can be used together, which is necessary since there are not spark equivalents for all of the mx components (notable omissions are DataGrid, Tree, DividedBox, among others.) Some of the motivations for the new spark components include: Separation of form from function, which means the spark components are very much skin driven.