Potential leak of an object allocated on line 23 and stored into “info”-Collection of common programming errors

Your problem is that you are allocating the memory and not releasing it. You need to read the memory rules and understand them, otherwise your code will leak or crash or both.

CHeck out https://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/MemoryMgmt/Articles/MemoryMgmt.html

and search here for memory management and ou will find many such questions.