title: [__NSDictionaryI objectAtIndex:]: unrecognized selector sent to instance
body: <p>I am getting this error
  [__NSDictionaryI objectAtIndex:]: unrecognized selector sent to instance </p>
  
  <p>how to read one by one each row data.this is my NSMutableArray.
  I need to read single code line datad from this array.</p>
  
  <pre><code>NSMutableArray *result = [obj objectForKey:@"quotes"];
  
      NSLog(@"%@",result);
      //dataCenter.currency_array=result;
  
  
      for (int i=0; i&lt;[result count]; i++) {
  
  
          NSLog(@"%@",[result objectAtIndex:i]);
  
          NSDictionary* obj = [result objectAtIndex:i];
  
          //[datasource addObject:obj];
          NSLog(@"%@",obj);
  
  
      }
  
  
  {
  USDAED = "3.672304";
  USDAFN = "67.503991";
  USDALL = "123.503989";
  USDAMD = "484.179993";
  USDANG = "1.790403";
  USDAOA = "165.087006";
  USDARS = "15.374041";
  USDAUD = "1.333604";
  USDAWG = "1.79";
  USDAZN = "1.702041";
  USDBAM = "1.797804";
  USDBBD = 2;
  USDBDT = "82.089996";
  USDBGN = "1.789404";
  USDBHD = "0.376204";
  USDBIF = "1700.75";
  USDBMD = 1;
  USDBND = "1.396804";
  USDBOB = "6.890399";
  USDBRL = "3.171604";
  USDBSD = 1;
  USDBTC = "0.000757";
  USDBTN = "64.125041";
  USDBWP = "10.422504";
  USDBYN = "1.870398";
  USDBYR = 20020;
  USDBZD = "1.997804";
  USDCAD = "1.365204";
  USDCDF = "1398.949951";
  USDCHF = "0.993604";
  USDCLF = "0.02487";
  USDCLP = "666.429993";
  USDCNY = "6.889904";
  USDCOP = "2937.300049";
  USDCRC = "551.080017";
  USDCUC = 1;
  USDCUP = "1.00036";
  USDCVE = "101.209999";
  USDCZK = "24.615999";
  USDDJF = "178.000359";
  USDDKK = "6.81567";
  USDDOP = "47.029999";
  USDDZD = "109.047997";
  USDEEK = "14.04404";
  USDEGP = "18.049999";
  USDERN = "15.290392";
  USDETB = "22.809999";
  USDEUR = "0.917704";
  USDFJD = "2.097504";
  USDFKP = "0.771604";
  USDGBP = "0.77219";
  USDGEL = "2.465104";
  USDGGP = "0.772237";
  USDGHS = "4.173304";
  USDGIP = "0.771904";
  USDGMD = "44.000355";
  USDGNF = "9200.000355";
  USDGTQ = "7.33804";
  USDGYD = "204.460007";
  USDHKD = "7.776604";
  USDHNL = "23.350388";
  USDHRK = "6.804904";
  USDHTG = "67.709999";
  USDHUF = "286.959991";
  USDIDR = 13327;
  USDILS = "3.61904";
  USDIMP = "0.772237";
  USDINR = "64.269997";
  USDIQD = 1181;
  USDIRR = "32439.000352";
  USDISK = "106.199997";
  USDJEP = "0.772237";
  USDJMD = "128.130005";
  USDJOD = "0.708804";
  USDJPY = "111.495003";
  USDKES = "102.949997";
  USDKGS = "67.474998";
  USDKHR = "3984.00035";
  USDKMF = "461.790009";
  USDKPW = "900.00035";
  USDKRW = "1136.369995";
  USDKWD = "0.303904";
  USDKYD = "0.820383";
  USDKZT = "314.51001";
  USDLAK = "8194.799805000001";
  USDLBP = "1506.699951";
  USDLKR = "152.050003";
  USDLRD = "91.000348";
  USDLSL = "13.371039";
  USDLTL = "3.048704";
  USDLVL = "0.62055";
  USDLYD = "1.407804";
  USDMAD = "9.913038999999999";
  USDMDL = "19.065001";
  USDMGA = "3150.000347";
  USDMKD = "56.189999";
  USDMMK = "1358.000346";
  USDMNT = "2409.000346";
  USDMOP = "8.009904000000001";
  USDMRO = "357.000346";
  USDMUR = "34.669998";
  USDMVR = "15.440378";
  USDMWK = "717.969971";
  USDMXN = "18.809039";
  USDMYR = "4.339039";
  USDMZN = "70.44000200000001";
  USDNAD = "13.335039";
  USDNGN = "314.503725";
  USDNIO = "29.403722";
  USDNOK = "8.583204";
  USDNPR = "102.099998";
  USDNZD = "1.455704";
  USDOMR = "0.384504";
  USDPAB = 1;
  USDPEN = "3.243104";
  USDPGK = "3.283039";
  USDPHP = "50.209999";
  USDPKR = "104.599998";
  USDPLN = "3.878038";
  USDPYG = "5558.000341";
  USDQAR = "3.640804";
  USDRON = "4.156704";
  USDRSD = "113.024902";
  USDRUB = "56.917038";
  USDRWF = "819.02002";
  USDSAR = "3.749604";
  USDSBD = "7.840604";
  USDSCR = "13.334038";
  USDSDG = "6.660372";
  USDSEK = "8.857404000000001";
  USDSGD = "1.396038";
  USDSHP = "0.771904";
  USDSLL = "7450.000338";
  USDSOS = "549.0003380000001";
  USDSRD = "7.48037";
  USDSTD = "22487.400391";
  USDSVC = "8.722038";
  USDSYP = "514.97998";
  USDSZL = "13.337404";
  USDTHB = "34.570369";
  USDTJS = "8.477104000000001";
  USDTMT = "3.4";
  USDTND = "2.414038";
  USDTOP = "2.313904";
  USDTRY = "3.550604";
  USDTTD = "6.709504";
  USDTWD = "30.155001";
  USDTZS = "2228.000335";
  USDUAH = "26.525038";
  USDUGX = "3640.899902";
  USDUSD = 1;
  USDUYU = "28.070367";
  USDUZS = "3705.000334";
  USDVEF = "9.974504";
  USDVND = 22739;
  USDVUV = "109.550003";
  USDWST = "2.593604";
  USDXAF = "601.590027";
  USDXAG = "0.058089";
  USDXAU = "0.000789";
  USDXCD = "2.703604";
  USDXDR = "0.729382";
  USDXOF = "603.659973";
  USDXPF = "108.919998";
  USDYER = "249.949997";
  USDZAR = "13.361604";
  USDZMK = "9.325037";
  USDZMW = "9.280362999999999";
  USDZWL = "322.355011";
  </code></pre>
  
  <p>}</p>
  
  <p>how i can read single record.</p>