iphone - Filtering an NSDictionary within a dictionary with particular text -

i getting web service repsonse array of dictionary. each dictionary has objects values dictionary.i need implement search within response,like if enter "technology" , go search, should dictionary array has "technology anywhere within dictionary", there solution sort out

     {          key1 =         {     0 =             {     "id" = 608;     "b" = "apple-iphone";      };     1 =             {     "id" = 609;     "b" = "iphone";     };     2 =             {     "id" = 610;     "b" = "show text";     };      };     key2 = "technology resources";     "key3" =         {     0 =             {     "id" = 1608;     "b" = "i love reading";     };     1 =             {     "id" = 1609;     "b" = "i prefer iphone others";     };     2 =             {                 "id" = 1610;                 "b" = "mobile technology great.i happy developer";             };          };          "key4" = "mobile technology fun"; } 

this first method

    nsmutabledictionary *dict;     nsarray *allkeys = [dict allkeys];     (nsstring  *key in allkeys)     {         nsdictionary *innerdict = [dict objectforkey:key];          nsarray *allinnerkeys = [innerdict allkeys];         (nsstring  *innerkey in allinnerkeys)         {             nsdictionary *mostinnerdict = [dict objectforkey:innerkey];             nsstring *b = [mostinnerdict objectforkey:b];             nsstring *search = @"technology";             nsstring *sub = [b substringfromindex:nsmaxrange([b rangeofstring:search])];             if(sub)             {                 // add mostinnerdict object results array             }          }     } 

or can try simpler method

get response in nsdata

covert nsdata nsstring

and search in nsstring substring