objective c - UIButton is 0x0000 when reload TableView in ios -

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i added uibutton each uitableview row when nedd reloaddata, uibutton 0x0000. can give me suggestions? much. used code:

 - (uitableviewcell *)tableview:(uitableview *)tableview cellforrowatindexpath:(nsindexpath *)indexpath {     /*nsstring *cellidentifier = [nsstring stringwithformat:@"%d,%d",indexpath.section,indexpath.row];   //  nsstring *cellidentifier = @"cell";     uitableviewcell *cell = [_tableview dequeuereusablecellwithidentifier:cellidentifier];     if (cell == nil)     {*/     nsstring *cellidentifier = [nsstring stringwithformat:@"%d,%d",indexpath.section,indexpath.row];     uitableviewcell *cell = [_tableview dequeuereusablecellwithidentifier:cellidentifier];     if (cell == nil) {         cell = [[[uitableviewcell alloc] initwithstyle:uitableviewcellstylesubtitle reuseidentifier:cellidentifier] autorelease];           uilabel *pricelabel = [[uilabel alloc] initwithframe:cgrectmake(80, 0, 80, 30)];         pricelabel.backgroundcolor = [uicolor clearcolor];         pricelabel.font = [uifont fontwithname:@"helvetica" size:16];         pricelabel.font = [uifont boldsystemfontofsize:16];         pricelabel.textcolor = [uicolor darkgraycolor];         pricelabel.tag = 3000;         //pricelabel.hidden = yes;         pricelabel.textalignment = nstextalignmentright;         [cell.contentview addsubview: pricelabel];         [pricelabel release];           uibutton * market = [[uibutton alloc] init];;         [market setframe:cgrectmake(200, 6, 30, 30)];          market.tag = 4000;          [market addtarget:self action:@selector(marketpressedaction:) forcontrolevents:uicontroleventtouchdown];          // [market settag:indexpath.row];          [cell.contentview addsubview:market];     }       if([pricenewarray count]> 0)     {         uilabel *pricelbl = (uilabel*)[cell.contentview viewwithtag:3000];         pricelbl.text =[nsstring stringwithformat:@"$%@",[pricenewarray objectatindex:indexpath.row]];         if ([sellingarray count]>0) {             if([[sellingarray objectatindex:indexpath.row] isequaltostring:@"2"]){                 pricelbl.hidden = no;             }             else if([[sellingarray objectatindex:indexpath.row] isequaltostring:@"0"]){                 pricelbl.hidden = yes;          }      }       }     uibutton *marketbutton = (uibutton*)[cell.contentview viewwithtag:4000];     [marketbutton settag:indexpath.row];     if([sellingarray count]>0)     {         nslog(@"sellingarray %@",sellingarray);         if([[sellingarray objectatindex:indexpath.row] isequaltostring:@"0"]) // nothing         {              [marketbutton setselected:no];             [marketbutton setimage:[uiimage imagenamed:@"marketplace.png"] forstate:uicontrolstatenormal];             marketbutton.enabled = yes;          }         else if([[sellingarray objectatindex:indexpath.row] isequaltostring:@"2"])  // marketplace         {              [marketbutton setselected:yes];             [marketbutton setimage:[uiimage imagenamed:@"marketplaceselect.png"] forstate:uicontrolstatenormal];             marketbutton.enabled = yes;          }     }       _tableview.contentinset = uiedgeinsetsmake(0, 0, 100, 0);      return cell; }

i used above code, when reloaddata, data of price label changed fine marketbutton can not changed image. debug after call [_tableview reloaddata];, marketbutton 0x0000 .

i think comparison not correct. trying compare integer string.

if asumed correct try this.

int sellingprice=0;  if([[sellingarray objectatindex:indexpath.row] isequaltostring: [nsstring stringwithformat:@"%i",sellingprice]]) // nothing   sellingprice=2;  else if([[sellingarray objectatindex:indexpath.row] isequaltostring:[nsstring stringwithformat:@"%i",sellingprice]])  // marketplace

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