Unused code

Unused Class  

Reports Objective-C classes and protocols that are never used.

Unused Instance Variable  

Reports the instance variables that are never accessed or written.

Unused Method  

Reports the methods that are never called, for example, in send message expressions, @selector expressions, and other places like XIB files.

Unused Property  

Reports the properties that are never accessed or written, neither in qualified expressions nor in accessor method calls.