sort an array of objects, with key, which is a dictionary

Question

I have array of dictionaries , i want to sort the array using the key @"date" which is in the format of a dictionary like.

 "date": {
                "day": 19,
                "month": 5,
                "year": 2014
            },

how can i sort the array based on the key @"date"??

Thanks

Answer 1

Try using

NSArray *sortedArray = [myArray sortedArrayUsingComparator:^(id o1, id o2) {
    NSDictionary *dict1 = (NSDictionary *)o1;
    NSDictionary *dict2 = (NSDictionary *)o2;

    if (![dict1[@"date"][@"year"] isEqualToString:dict2[@"date"][@"year"]])
          return [dict1[@"date"][@"year"] compare:dict2[@"date"][@"year"] options:NSCaseInsensitiveSearch];
    else {
          // years are equal
          // continue comparing by month, day, etc
    }
}];

Only compare based on the keys you want