How to avoid loop download image in cellForRowAtIndexPath?

i use code below download image, found code keep downloading never stop, can avoid it?

code:

 - (uitableviewcell *)tableview:(uitableview *)tableview cellforrowatindexpath:(nsindexpath *)indexpath {     static nsstring *cellidentifier = @"appsearchcell";     uitableviewcell *cell = [tableview dequeuereusablecellwithidentifier:cellidentifier]; 	     if (cell == nil) {         cell = [[uitableviewcell alloc] initwithstyle:uitableviewcellstyledefault reuseidentifier:cellidentifier]; 	cell.backgroundcolor = [uicolor orangecolor];         cell.imageview.image = nil;     }  #define kbgqueue dispatch_get_global_queue(dispatch_queue_priority_default, 0)      dispatch_async(kbgqueue, ^{         nsstring *iconurl = [searchresultsiconurl objectatindex:indexpath.row];         nsdata *imagedata = [nsdata datawithcontentsofurl:[nsurl urlwithstring:iconurl]];                  dispatch_async(dispatch_get_main_queue(), ^{             cell.imageview.image = [uiimage imagewithdata:imagedata];             [tableview reloadrowsatindexpaths:[nsarray arraywithobject:indexpath] withrowanimation:uitableviewrowanimationnone];         });     });          return cell; }

 

first thing not want doing download in call. slow down loading of table.

loop calling "reloadrowsatindexpaths" going trigger cellforrowatindexpath

suggestion start download in viewdidload or viewwillappear method , update table without going loop.

 

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