ios - Getting the error NSCFDictionary objectAtIndex while displaying data in Uitableview -

i new ios , when implementing fetch data api , getting -[__nscfdictionary objectatindex:]: error.

code:

request dispatching

-(void)jobtakefive{      [mbprogresshud showhudaddedto:self.view animated:yes];      //nsurlrequest *request = [nsurlrequest requestwithurl:[nsurl urlwithstring:[nsstring stringwithformat:@"http://www.json-generator.com/api/json/get/cucmzxkuoa?indent=2"]]];       nsurlrequest *request = [nsurlrequest requestwithurl:[nsurl urlwithstring:[nsstring stringwithformat:@"http://www.json-generator.com/api/json/get/cpviemqesy?indent=2"]]];      nslog(@"%@",request);      nsurlconnection *conn = [[nsurlconnection alloc] initwithrequest:request delegate:self];      if (conn)     {         responsedata = [[nsmutabledata alloc] init];      }else{      } } 

response handling , parsing

- (void)connection:(nsurlconnection *)connection didreceiveresponse:(nsurlresponse *)response {     [responsedata setlength:0];     postresponce = [[nsmutabledata alloc] init];     [postresponce setlength:0]; }  - (void)connection:(nsurlconnection *)connection didreceivedata:(nsdata *)data {      [responsedata appenddata:data];     [postresponce appenddata:data]; }  -(void)connection:(nsurlconnection *)connection didfailwitherror:(nserror *)error{      nslog(@"%@ ", [error localizeddescription]);  }   - (void)connectiondidfinishloading:(nsurlconnection *)connection {      nserror *error=nil;      nsdictionary *responce =[nsjsonserialization jsonobjectwithdata:responsedata options:kniloptions error:&error];      resparray=[responce valueforkey:@"yes_questions"];    resparray1=[responce valueforkey:@"no_questions"];        [mbprogresshud hidehudforview:self.view animated:yes];      [take5table reloaddata];  } 

troublezone - showing response in tableview

-(nsinteger)numberofsectionsintableview:(uitableview *)tableview {      return 2;  }  - (nsinteger)tableview:(uitableview *)tableview numberofrowsinsection:(nsinteger)section {      switch (section) {         case 0:             return resparray.count;             break;          case 1:             return resparray1.count;             break;          default:             return 0;     } }    -(void)tableview:(uitableview *)tableview didselectrowatindexpath:(nsindexpath *)indexpath{   [tableview deselectrowatindexpath:indexpath animated:yes];      uitableviewcell *cell = [tableview cellforrowatindexpath:indexpath];      nslog(@"section:%ld row:%ld selected , data %@",           (long)indexpath.section,(long)indexpath.row,cell.textlabel.text); }  - (nsstring *)tableview:(uitableview *)tableview titleforheaderinsection:(nsinteger)section{   if (section == 0) return @"first section header title";     if (section == 1) return @"second section header title";      else      return @"hello world"; } -(uitableviewcell*)tableview:(uitableview *)tableview cellforrowatindexpath:(nsindexpath *)indexpath {     static nsstring *cellidentifier = @"cellidentifier1";      uitableviewcell *cell = [tableview dequeuereusablecellwithidentifier:cellidentifier];      if (!cell) {         cell = [[uitableviewcell alloc] initwithstyle:uitableviewcellstyledefault reuseidentifier:cellidentifier];         cell.accessorytype = uitableviewcellaccessorydisclosureindicator;     }      uilabel *sno = (uilabel *)[cell viewwithtag:96];      uilabel *queslab = (uilabel *)[cell viewwithtag:98];       if (indexpath.section==0) {       //   titleuil.text = [[dicc valueforkey:[headersarray objectatindex:indexpath.section]]objectatindex:indexpath.row];          sno.text=[nsstring stringwithformat:@"%@",[[resparray objectatindex:indexpath.row] valueforkey:@"question_id"]];          queslab.text=[[resparray objectatindex:indexpath.row]valueforkey:@"question_title"];      }      else if (indexpath.section==1){          sno.text=[nsstring stringwithformat:@"%@",[[resparray1 objectatindex:indexpath.row] valueforkey:@"question_id"]];          queslab.text=[[resparray1 objectatindex:indexpath.row]valueforkey:@"question_title"];      }      if (indexpath.row %2 ==1)         cell.backgroundcolor = [uicolor colorwithred:.9 green:.9 blue:.9 alpha:1];     else         cell.backgroundcolor = [uicolor colorwithred:.8 green:.8 blue:.8 alpha:1];     return cell; }  -(cgfloat)tableview:(uitableview *)tableview heightforrowatindexpath:(nsindexpath *)indexpath {     return  50; } 

error

-[__nscfdictionary objectatindex:]: unrecognized selector sent instance 0x7f90d3eaf8a0 2016-11-08 10:44:16.935 ecs services[3691:701820] *** terminating app due uncaught exception 'nsinvalidargumentexception', reason: '-[__nscfdictionary objectatindex:]: unrecognized selector sent instance 0x7f90d3eaf8a0' 

my response is:

printing description of responce: {     "job_location" = "crown promenade ";     "job_name" = "test schedule 2 crown promenade";     "job_no" = 207;     "no_questions" =     {         12 =         {             "question_answer" = no;             "question_id" = 13;             "question_title" = "is there risk of falls or falling objects?";             "question_type" = full;         };         13 =         {             "question_answer" = no;             "question_id" = 14;             "question_title" = "is there risk of plant or traffic interaction?";             "question_type" = full;         };         14 =         {             "question_answer" = no;             "question_id" = 15;             "question_title" = " there risk of electrical hazards?";             "question_type" = full;         };         15 =         {             "question_answer" = no;             "question_id" = 16;             "question_title" = " work in or involve confined space? ";             "question_type" = full;         };         16 =         {             "question_answer" = no;             "question_id" = 19;             "question_title" = " job involve hot works?";             "question_type" = short;         };         17 =         {             "question_answer" = no;             "question_id" = 20;             "question_title" = "is there risk of environmental damage? ";             "question_type" = full;         };         18 =         {             "question_answer" = no;             "question_id" = 21;             "question_title" = " there risk of crush injuries? (in,on or between)";             "question_type" = full;         };         19 =         {             "question_answer" = no;             "question_id" = 22;             "question_title" = "is there risk of water  or sun hazards?";             "question_type" = full;         };         20 =         {             "question_answer" = no;             "question_id" = 23;             "question_title" = "are there access issues or concerns ";             "question_type" = full;         };         21 =         {             "question_answer" = no;             "question_id" = 24;             "question_title" = " there hazards involving unstable ground?";             "question_type" = full;         };         22 =         {             "question_answer" = no;             "question_id" = 25;             "question_title" = " need apply isolation ?.................... ";             "question_type" = short;         };         23 =         {             "question_answer" = no;             "question_id" = 26;             "question_title" = "could there uncontrolled movement? \u2026...\u2026\u2026.\u2026.. ";             "question_type" = full;         };         24 =         {             "question_answer" = no;             "question_id" = 27;             "question_title" = "do need mechanical lifting or work @ height platform? .. ";             "question_type" = full;         };         25 =         {             "question_answer" = no;             "question_id" = 39;             "question_title" = test;             "question_type" = full;         };     };     "yes_questions" =     {         0 =         {             "question_answer" = yes;             "question_id" = 1;             "question_title" = " understand job thoroughly?";             "question_type" = full;         };         1 =         {             "question_answer" = yes;             "question_id" = 2;             "question_title" = "am authorized, qualified & trained work?";             "question_type" = short;         };         10 =         {             "question_answer" = yes;             "question_id" = 11;             "question_title" = "do have appropriate ppe & in condition?";             "question_type" = full;         };         11 =         {             "question_answer" = yes;             "question_id" = 12;             "question_title" = "can complete task on own ? ";             "question_type" = full;         };         2 =         {             "question_answer" = yes;             "question_id" = 3;             "question_title" = "do have correct tools & they\u2019re in condition?";             "question_type" = full;         };         26 =         {             "question_answer" = yes;             "question_id" = 40;             "question_title" = "";             "question_type" = full;         };         27 =         {             "question_answer" = yes;             "question_id" = 41;             "question_title" = "equipment in condition";             "question_type" = full;         };         3 =         {             "question_answer" = yes;             "question_id" = 4;             "question_title" = "have informed others may affected work? ";             "question_type" = full;         };         4 =         {             "question_answer" = yes;             "question_id" = 5;             "question_title" = "is there free access others not involved in vicinity?";             "question_type" = full;         };         5 =         {             "question_answer" = yes;             "question_id" = 6;             "question_title" = " have read & understand swms applicable task? ";             "question_type" = full;         };         6 =         {             "question_answer" = yes;             "question_id" = 7;             "question_title" = "have obtained permits & filled out correct paperwork? ";             "question_type" = short;         };         7 =         {             "question_answer" = yes;             "question_id" = 8;             "question_title" = "have applied lock out tags (where & if required)? ";             "question_type" = full;         };         8 =         {             "question_answer" = yes;             "question_id" = 9;             "question_title" = " have performed pre job on-site inspection?";             "question_type" = full;         };         9 =         {             "question_answer" = yes;             "question_id" = 10;             "question_title" = " fit task? (fatigue, injury, medications)";             "question_type" = full;         };     }; } 

the problem is, response returning dictionaries, not arrays expecting. fix that, can use allvalues method of nsdictionary returns array of values inside dictionary.

to fix that, make following corrections:

in response parsing:

- (void)connectiondidfinishloading:(nsurlconnection *)connection {      nserror *error=nil;      nsdictionary *responce =[nsjsonserialization jsonobjectwithdata:responsedata options:kniloptions error:&error];      resparray=[[responce valueforkey:@"yes_questions"] allvalues]; //now have array of dictionaries contained in dictionary key yes_question    resparray1=[[responce valueforkey:@"no_questions"] allvalues];//now have array of dictionaries contained in dictionary key no_question        [mbprogresshud hidehudforview:self.view animated:yes];      [take5table reloaddata];  }