ios - Remove duplicates from NSMutableArray of NSDictionary depending on value of key -

i have nsmutablearray of, say, 10 nsmutablearrays. each of these nsmutablearrays contains different number of nsdictionary objects have made model class. data api response. first time make api call, response whole data. on, when api call made, returns data modified.

when new data api response, contains data in array of dictionaries slight modifications.

model class's structure below:

subcategory.h

@interface subcategory : mtlmodel <mtljsonserializing>  @property (nonatomic, retain) nsstring *subcategoryid; @property (nonatomic, retain) nsstring *subcategoryname; @property (nonatomic, retain) nsstring *status;  @end 

json object returned this:

{     "sub_category" =             (                             {                 id = 55ed48123;                 name = "sub category 1";                 status = 1;             },                             {                 id = 55ed47ed3;                 name = "sub category 2";                 status = 1;             }       ); } 

the 'id' field of new data same. 'name' , 'status' fields different. want replace data in nsmutablearray of nsdictionary objects new data retains order of objects in array. how can this?

1: use nspredicate create criteria duplicate condition.

2: use filteredarrayusingpredicate array of duplicated objects.

3: remove 1 object duplicated array.

4: use removeobjectsinarray remove list of objects in duplicated array original array.