Flex 打开项目后,,提示:“An unknown item is declared as the root of your MXML document”
今天打开flexbuilder 新建一个新的 flex项目,但是在打开Design画面的时候,出现了
"An unknown item is declared as the root of your MXML document. Switch to source mode to correct it"
错误,在网上找到原因:
这个是因为没有Flex builder,也就是说没有加入Flex SDK编译,只要在项目上右击,"Flex project Nature" ->"Add flex project nature" (其它的几个类似这样操作)