Try this: Replace your code
UIImageView *imgView=[[UIImageView alloc] initWithFrame:CGRectMake(20, 5, 90, 70)];
imgView.backgroundColor=[UIColor clearColor];
[imgView.layer setCornerRadius:30];
[imgView.layer setMasksToBounds:YES];
[imgView setImageWithURL:[NSURL URLWithString:imageURL]];
[cell.imageView setImageWithURL:[NSURL URLWithString:imageURL] placeholderImage:[UIImage imageNamed:@"placeholder.png"] ];
with below code And Import "QuartzCore/QuartzCore.h" Framework
cell.imageView.backgroundColor=[UIColor clearColor];
[cell.imageView.layer setCornerRadius:30];
[cell.imageView.layer setMasksToBounds:YES];
[cell.imageView setImageWithURL:[NSURL URLWithString:imageURL] placeholderImage: [UIImage imageNamed:@"placeholder.png"] ];