ios - array has 10 nil objects? -

so have 4 types of arrays,

@property nsmutablearray *snowimagearray; @property nsmutablearray *dogimagearray; @property nsmutablearray *catimagearray; @property nsmutablearray *rabbitimagearray; 

these arrays store custom objects standardurl, username,etc . created array called

  @property nsmutablearray *allimagearray; 

where stored 4 object arrays in allimagearray. want populate allimagearray in collection view.. far have in cellforitematindexpath method... looped through array this..

nsarray *allimagearray = [self.allimagearray objectatindex:indexpath.row];         nslog(@"%@",allimagearray);         (nsmutablearray *searchdataimage in allimagearray) {         (imagehelper *imagehelper in searchdataimage) {             nsurl *url = [nsurl urlwithstring:imagehelper.standardphotourl];             nsdata *data = [[nsdata alloc]initwithcontentsofurl:url];             uiimage *image = [uiimage imagewithdata:data];             cell.imageview.image = image;         }     } 

now reason allimagearray has 10 objects literally have nothing in them prints 10 objects has @"0 objects".. instantiated allimagearray in viewdidload. double checked methods , made sure did 4 times dog, snow, rabbit & cat:

             [self.rabbitimagearray addobject:imagehelper]; //adds objects array              [self.allimagearray addobject:self.rabbitimagearray];              [self.tableview reloaddata] 

please tell me did wrong? :/

try initialize arrays before adding objects:

self.snowimagearray = [nsmutablearray new]; self.dogimagearray = [nsmutablearray new]; self.catimagearray = [nsmutablearray new]; self.rabbitimagearray = [nsmutablearray  new];  self.allimagearray = [nsmutablearray new];