ios - Image data Shows nil while retrieving image from JSON Array in objective c -

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i new in ios. , trying load images custom uitableviewcell unfortunately not getting desired results.

in didfinishlaunching method

    imagearray=[[nsmutablearray alloc] init];     imagearray=[responsedict valueforkey:@"empimg"];     nslog(@"image array =%@",imagearray);

table view cellforrowatindexpath method

- (uitableviewcell *)tableview:(uitableview *)tableview cellforrowatindexpath:(nsindexpath *)indexpath {     static nsstring *sti=@"sti";     newjoineecell *cell = (newjoineecell *)[tableview dequeuereusableheaderfooterviewwithidentifier:sti];     if (cell == nil)     {         nsarray *nib = [[nsbundle mainbundle] loadnibnamed:@"newjoineecell" owner:self options:nil];         cell = [nib objectatindex:0];         cell.accessorytype=uitableviewcellaccessorynone;     }      nsdata *imagedata=[[nsdata alloc]initwithcontentsofurl:[nsurl urlwithstring:[imagearray objectatindex:indexpath.row]] ];     uiimage *image11=[[uiimage alloc]initwithdata:imagedata];     cell.propic.image=image11;      return cell;  }

by debugging imagedata shows nil value while imagearray contain 13 objects 

"http://url/uploadedfiles/mksfdf.png"


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