external NSString from NSDictionary string item

Question

I have a PList with strings and a dictionary. I am loading it in to an NSDictionary object, that much I've worked out fine. What I'm stuck with is getting a string entry from the NSdictionary object in to an external string, because by the time the external variable references the object (gotten with "ObjectByKey") from a separate class, the NSDictionary is no longer anywhere to be found. My question is, how do I get a string from an NSDictionary as a static string - not as a reference to an NSDictionary string entry? Below is my code:

loginGlobals.h

extern NSString *loginError;

LoginProcessorViewController.m

NSDictionary *responseData = [NSPropertyListSerialization propertyListFromData:plistData mutabilityOption:NSPropertyListImmutable format:&format errorDescription:&error];

loginError = [responseData objectForKey:@"Error"];

and then the error comes up (EXC_BAD_ACCESS) when I do this in loginViewController.m:

loginErrorLabel.text = loginError;

Answer 1

Retain the loginError object

loginError = [[responseData objectForKey:@"Error"] retain];