These classes are for replacing NSNull objects from Arrays and Dictionaries when parsing API responses.

Download these files and add in your project.

import like this in your project:

#import "NSArray+NullReplacement.h"
#import "NSDictionary+NullReplacement.h"

NSDictionary *data=@{@"status":201,@"message":null};
data=[data dictionaryByReplacingNullsWithBlanks];

output will be

@{@"status":201,@"message":@""}

It will remove all Null objects and replace them with empty strings to avoid crashes in your app.