Interface Builder is missing in xCode 4.0

I have installed xCode 4.0.2 on my mac mini, every thing is working fine, I have compiled some sample applications too,开发者_如何学JAVA but the interface builder is missing in the directory Developer/Application while xCode.app is there.

Interface Builder is no longer a sperate app, it is fully integrated in Xcode 4.

Interface Builder is inbuilt with Xcode 4 now. So you can just select your .xib file and it will show at right side. You may need to select last icon on right side top navigator to display Interface builder.