Storing/Loading NSArray to NSMutableDictionary

I have a NSMutableDictionary of NSArrays stored in the AppDelegate. I nee开发者_Python百科d to add new NSArrays in one view controller and load the contents of the NSMutableDictionary in another view controller. I am using a shared appDelegate but for some reason the xcode hangs. Also I don't see any error in the debugger. THis is getting frustrating.