ios - sorting a nested NSMutableArray -

the nsmutablearray want sort looks this:

 (         {             "title" = "bags";             "price" = "$200";         },         {             "title" = "watches";             "price" = "$40";         },         {             "title" = "earrings";             "price" = "$1000";         }  ) 

it's nsmutablearray contain collection of nsmutablearrays. want sort price first title.

nssortdescriptor *sortbyprices = [[nssortdescriptor alloc] initwithkey:@"price" ascending:yes]; nssortdescriptor *sortbytitle = [[nssortdescriptor alloc] initwithkey:@"title" ascending:yes];  [arrayproduct sortedarrayusingdescriptors:[nsarray arraywithobjects:sortbyprices,sortbytitle,nil]]; 

however, didn't seems work, how sort nested nsmutablearray?

try

    nsmutablearray  *arrayproducts = [@[@{@"price":@"$200",@"title":@"bags"},@{@"price":@"$40",@"title":@"watches"},@{@"price":@"$1000",@"title":@"earrings"}] mutablecopy];      nssortdescriptor *pricedescriptor = [nssortdescriptor sortdescriptorwithkey:@""                                                                  ascending:yes                                                                 comparator:^nscomparisonresult(nsdictionary  *dict1, nsdictionary *dict2) {                                                                     return [dict1[@"price"] compare:dict2[@"price"] options:nsnumericsearch];     }];      nssortdescriptor *titledescriptor = [nssortdescriptor sortdescriptorwithkey:@"title" ascending:yes];        [arrayproducts sortusingdescriptors:@[pricedescriptor,titledescriptor]];      nslog(@"sortedarray : %@",arrayproducts);