ios - UITableView not populating cell completely until moved off screen -

i using parse populate cells in tableview. each cell contains username, user's picture, , actual post content. when run app, username , post content loaded each cell. picture not loaded until cell moved off screen , moved back. here code involving query:

-(void)retrievefromparse {  pfquery *retrieveposts = [pfquery querywithclassname:@"posts"]; [retrieveposts orderbydescending:@"createdat"]; retrieveposts.cachepolicy = kpfcachepolicycachethennetwork; [retrieveposts findobjectsinbackgroundwithblock:^(nsarray *objects, nserror *error) {      if (!error) {          postsarray = [[nsarray alloc] initwitharray:objects];           dispatch_async(dispatch_get_main_queue(), ^{             [self.tableview reloaddata];         });     }          dispatch_async(dispatch_get_main_queue(), ^{             [self.refreshcontrol endrefreshing];     }); }]; } 

here code tableview:

-(uitableviewcell *)tableview:(uitableview *)tableview cellforrowatindexpath:(nsindexpath *)indexpath {  postcell = [tableview dequeuereusablecellwithidentifier:@"postcellone"];   if (postcell == nil ) {      postcell = [[posttableviewcell alloc] initwithstyle:uitableviewcellstyledefault reuseidentifier:@"postcellone"];   }  postcell.backgroundcolor = [uicolor blackcolor]; postcell.postername.textcolor = [uicolor whitecolor]; postcell.postcontent.textcolor = [uicolor whitecolor];  pfobject *postobject = [postsarray objectatindex:indexpath.row]; postcell.postername.text = [postobject objectforkey:@"postername"]; postcell.postcontent.text = [postobject objectforkey:@"postcontent"]; uiactivityindicatorview *spinner = [[uiactivityindicatorview alloc]initwithframe:postcell.posterimage.frame]; [postcell.posterimage addsubview:spinner]; spinner.color = [uicolor whitecolor]; [spinner startanimating]; imagefile = [postobject objectforkey:@"posterpicture"]; [imagefile getdatainbackgroundwithblock:^(nsdata *data, nserror *error) {     if (!error) {          dispatch_async(dispatch_get_main_queue(), ^{         [spinner removefromsuperview];         postcell.posterimage.image = [uiimage imagewithdata:data];         [tableview reloadinputviews];          });     }      else {          dispatch_async(dispatch_get_main_queue(), ^{             [spinner removefromsuperview];         });     } }];  return postcell;  } 

i using parse populate cells in tableview. each cell contains username, user's picture, , actual post content. when run app, username , post content loaded each cell. picture not loaded until cell moved off screen , moved back. here code involving query:

-(void)retrievefromparse {  pfquery *retrieveposts = [pfquery querywithclassname:@"posts"]; [retrieveposts orderbydescending:@"createdat"]; retrieveposts.cachepolicy = kpfcachepolicycachethennetwork; [retrieveposts findobjectsinbackgroundwithblock:^(nsarray *objects, nserror *error) {      if (!error) {          postsarray = [[nsarray alloc] initwitharray:objects];           dispatch_async(dispatch_get_main_queue(), ^{             [self.tableview reloaddata];         });     }          dispatch_async(dispatch_get_main_queue(), ^{             [self.refreshcontrol endrefreshing];     }); }]; } 

here code tableview:

 -(void)imagefromimagefile:(pffile *)imagefile forcell:(posttableviewcell *)cell {     posttableviewcell *workingcell = cell;     uiactivityindicatorview *spinner = [[uiactivityindicatorview alloc]initwithframe:postcell.posterimage.frame];     [workingcell.posterimage addsubview:spinner];     spinner.color = [uicolor whitecolor];     [spinner startanimating];     [imagefile getdatainbackgroundwithblock:^(nsdata *data, nserror *error) {         if (!error) {             if(workingcell == cell){                 dispatch_async(dispatch_get_main_queue(), ^{                     [spinner removefromsuperview];                     workingcell.posterimage.image = [uiimage imagewithdata:data];                     [workingcell setneedslayout];                  });             }else{                  dispatch_async(dispatch_get_main_queue(), ^{                     [spinner removefromsuperview];                 });             }         }     }];  }   -(uitableviewcell *)tableview:(uitableview *)tableview cellforrowatindexpath:(nsindexpath *)indexpath {      postcell = [tableview dequeuereusablecellwithidentifier:@"postcellone"];       if (postcell == nil ) {          postcell = [[posttableviewcell alloc] initwithstyle:uitableviewcellstyledefault reuseidentifier:@"postcellone"];       }      postcell.backgroundcolor = [uicolor blackcolor];     postcell.postername.textcolor = [uicolor whitecolor];     postcell.postcontent.textcolor = [uicolor whitecolor];      pfobject *postobject = [postsarray objectatindex:indexpath.row];     postcell.postername.text = [postobject objectforkey:@"postername"];     postcell.postcontent.text = [postobject objectforkey:@"postcontent"];      imagefile = [postobject objectforkey:@"posterpicture"];     cell.posterimage.image = nil;     [self imagefromimagefile:imagefile forcell:cell];      return postcell;  }