There are numerous unique features to the Apple Interface Builder in XCode, which makes it a difficult tool to master. Seemed there anything about the system that was logical to you? In what ways were...

There are numerous unique features to the Apple Interface Builder in XCode, which makes it a difficult tool to master. Seemed there anything about the system that was logical to you? In what ways were the answers challenging and confusing? XCode's interface builder: how does it perform?