Ignore “Attribute Unavailable”-Warning in Xcode4

Question

I\'m using a lot of \"custom identifiers\" for Toolbar Items, which is fine in Xcode4, but it gives me a bunch of warnings when I build the project:

A

Answer 1

I am running Xcode 4.2 build 4C199.

1. Click on xib file,
2. on the right, click on Utilies View

3. Click File Inspector. As tony.stack mentioned look under "interface BuilderDocument"
   set Deployment = "Project SDK version"
   set Development = " xcode 4.2"

   Even if you are running xcode 4.2, the Development is set to default 4.1, So you get that warning.