Interface Builder Targets

A few days ago I wrote a blog post about updating an iPhone application for iOS4 and Xcode 3.2.3. Today. I discovered that many of the errors Interface Builder was generating when building my project under Base SDK 4, Target 3.1.2 was bad settings in many of my XIB files.

Before, the Deployment target was iPhone OS 2.1 and Development Target was Interface Builder 3.0.

Since this is an iOS 3.1 based application, I made the following changes to all the XIB with errors:

By making those changes, all the warnings were gone.