I\'ve got the following in my .h file:
#ifndef _BALANCE_NOTIFICATION #define _BALANCE NOTIFICATION const NSString *BalanceUpdateNotification #endif >
#ifndef _BALANCE_NOTIFICATION #define _BALANCE NOTIFICATION const NSString *BalanceUpdateNotification #endif
This is the working solution to declare NSString name for observers.
static NSString *const MyCustomNotificationName = @"MyCustomNotificationName";