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I have the same question as on this page:
In Interface Builder 3, we can drag custom object( ex. subview obj UIView ) to the stage. But in XCode 4, after we create a xib, I have trouble to reuse it except by code.
And In the "Object Library" -> "Custom Objects",it's empty.
But the answer given there doesn't work for me. I drag the xib file to Custom Objects list but it doesn't add anything to the list.

