ios - Getting (null) when I Parse the number from webservice -


i have display price of product webservice value (null)

 nsarray *arr = [pjson objectforkey:@"response"];     nslog(@"%@",arr);     (int i=0;i<arr.count;i++) {         nsstring *thumbnail_data = [[arr objectatindex:i]objectforkey:@"img"];         nsstring *ring_data = [[arr objectatindex:i]objectforkey:@"name"];         nsstring *id_data = [[arr objectatindex:i]objectforkey:@"id"];          nsstring *cost_data = [[arr objectatindex:i]objectforkey:@"productprice"];         nslog(@"thumbnail: %@",thumbnail_data);         nslog(@"author: %@",ring_data);          nslog(@"author: %@",cost_data);         dictionary = [nsdictionary dictionarywithobjectsandkeys:                       thumbnail_data, img,                       ring_data,name,id_data,id,cost_data,cost,                       nil];         [myobject addobject:dictionary];     }  - (uicollectionviewcell *)collectionview:(uicollectionview *)collectionview cellforitematindexpath:(nsindexpath *)indexpath {      subcatcell =(productcollectionviewcell *)[collectionview dequeuereusablecellwithreuseidentifier:@"productcell" forindexpath:indexpath];     nsdictionary *tmpdict = [myobject objectatindex:indexpath.row];     nsmutablestring *detail;     detail = [nsmutablestring stringwithformat:@"%@",               [tmpdict objectforkey:name]];    // nsnumber *price = [tmpdict objectforkey:cost];     nsmutablestring *price;     price = [nsmutablestring stringwithformat:@"%@",           [tmpdict objectforkey:cost]];     nslog(@"%@",price);     // nsmutablestring *catid;     catid = [nsmutablestring stringwithformat:@"%@",              [tmpdict objectforkey:id]];      nsmutablestring *images;     images = [nsmutablestring stringwithformat:@"%@ ",               [tmpdict objectforkey:img]];      nsurl *url = [nsurl urlwithstring:[tmpdict objectforkey:img]];     nsdata *data = [nsdata datawithcontentsofurl:url];     img= [[uiimage alloc]initwithdata:data];      subcatcell.imageview.image = img;     subcatcell.lblcost.text = [nsstring stringwithformat:@"%@",price];     subcatcell.lblname.text = detail;     return subcatcell; }

when nslog "cost_data" price displayed correctly when nslog "price" in cellforitemindexpath i'm getting "(null)"

may not allocated memory nsdictionary or nsmutablearray. kindly following changes may solved issue.

step 1 : allocate myobject in viewdidload

myobject = [[nsmutablearray alloc] init];

step 2 : replace set of below codes.

nsarray *arr = [pjson objectforkey:@"response"];     nslog(@"%@",arr);     (int i=0;i<arr.count;i++) {         nsstring *thumbnail_data = [[arr objectatindex:i]objectforkey:@"img"];         nsstring *ring_data = [[arr objectatindex:i]objectforkey:@"name"];         nsstring *id_data = [[arr objectatindex:i]objectforkey:@"id"];          nsstring *cost_data = [[arr objectatindex:i]objectforkey:@"productprice"];         nslog(@"thumbnail: %@",thumbnail_data);         nslog(@"author: %@",ring_data);          nslog(@"author: %@",cost_data);       nsdictionary*  dictionary = [nsdictionary dictionarywithobjectsandkeys:                       thumbnail_data, @"img",                       ring_data,@"name",id_data,@"id",cost_data,@"cost",                       nil];         [myobject addobject:dictionary];     }

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