ios - NSRangeException in cellForRowAtIndexPath -

we using - (uitableviewcell *)cellforrowatindexpath:(nsindexpath *)indexpath; method retrieve cell @ specific index path. - (uitableviewcell *)cellforrowatindexpath:(nsindexpath *)indexpath return object representing cell of table or nil if cell not visible or indexpath out of range. repeating calls - (uitableviewcell *)cellforrowatindexpath:(nsindexpath *)indexpath causes nsrange exception. can reason?

nsindexpath *ip = [nsindexpath indexpathforrow:index insection:0];         customcell *cell = (customcell *)[tableview_ cellforrowatindexpath:ip]; 

code

 - (uitableviewcell *)tableview:(uitableview *)tableview cellforrowatindexpath:(nsindexpath *)indexpath { customcell *cell = nil; static nsstring *cellidentifier = @"cell"; cell = (customcell *)[tableview dequeuereusablecellwithidentifier:cellidentifier];  if (cell == nil) {     nsarray *nibs = [[nsbundle mainbundle] loadnibnamed:@"customcell" owner:self options:nil];     cell = [nibs objectatindex:0]; } imagecache *imagecache = [[imagecache alloc]initwithurl:sentcard.sentimage];     uiimage *cachedimage = [imagecache fetchimagefromcache];     if (cachedimage!=nil) {         cell.cardimage.image = [utility scaleimagetosize:cell.cardimage.frame.size image:cachedimage];         [cell.loadingindicator stopanimating];     }     else {         imagecache.cachedelegate = self;         imagecache.cacheduration = 24.0;         [imagecache fetchimage];     } return cell; } 

you asking cell not being created yet. example, should crash on first cell (index 0). should ask cell (aka cellforrowatindexpath) once table being populated.