Correctly rounded images in UITableViewCell

gistfile1.m

- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath {
  UIRectCorner cornerDef;
  if (indexPath.row == 0) {
    cornerDef = UIRectCornerTopLeft|UIRectCornerTopRight;
  } else if (indexPath.row == 1) {
    cornerDef = UIRectCornerBottomLeft|UIRectCornerBottomRight;
  }
  CAShapeLayer *maskLayer = [CAShapeLayer layer];
  UIBezierPath *roundedPath = [UIBezierPath bezierPathWithRoundedRect:cell.bounds
      byRoundingCorners:cornerDef cornerRadii:CGSizeMake(9.0f, 9.0f)];
  maskLayer.fillColor = [[UIColor whiteColor] CGColor];
  maskLayer.backgroundColor = [[UIColor clearColor] CGColor];
  maskLayer.path = [roundedPath CGPath];
  [cell.imageView.layer setMask:maskLayer];
  [cell.imageView.layer setMasksToBounds:YES];
  [cell.imageView setNeedsDisplay];
}