Selecting UITableViewCells in grouped UITableViews with custom color or view

gistfile1.m

#import <QuartzCore/QuartzCore.h>

@implementation CustomTableViewController

-(void)setSelectionViewForCell:(UITableViewCell*)cell withRoundedRectCorners:(UIRectCorner)rectCorners
{
    CGRect cellRect = CGRectMake(0, 0, cell.bounds.size.width-18, cell.bounds.size.height);
    UIView *view = [[UIView alloc] initWithFrame:cellRect];
    
    if (rectCorners != 0) { //we need rounded corners, beginning or end of a tableViewSection
        
        UIBezierPath * maskPath = [UIBezierPath bezierPathWithRoundedRect:cellRect  byRoundingCorners:rectCorners cornerRadii:CGSizeMake(10.f, 10.f)];
        CAShapeLayer *maskLayer = [CAShapeLayer layer];
        maskLayer.frame = cellRect;
        maskLayer.path = maskPath.CGPath;
        view.layer.mask = maskLayer;
    }
    [view setBackgroundColor:[UIColor redColor]];
    [cell setSelectedBackgroundView:view];
}

@end