Rounded and shadowed UINavigationBar

-(void)initTableView
{
    //Aspecto
    [[UINavigationBar appearance] setBackgroundImage:[UIImage imageNamed:FONDO_BARRA_INICIAL] forBarMetrics:UIBarMetricsDefault];

    //Tabla
    self.tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
    [self.tableView setBackgroundView:nil];
    [self.tableView setBackgroundColor:RGB2UICOLOR(247.0f, 247.0f, 247.0f, 1.0f)];
    [self.tableView setSeparatorStyle:UITableViewCellSeparatorStyleSingleLine];
    [self.tableView setBounces:YES];


    CALayer *capa = [self.navigationController navigationBar].layer;
    [capa setShadowColor: [[UIColor blackColor] CGColor]];
    [capa setShadowOpacity:0.85f];
    [capa setShadowOffset: CGSizeMake(0.0f, 1.5f)];
    [capa setShadowRadius:2.0f];
    [capa setShouldRasterize:YES];


    //Redondeamos
    CGRect bounds = capa.bounds;
    bounds.size.height += 10.0f;    //Para que pueda salir la sombra...
    UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:bounds
                                                   byRoundingCorners:(UIRectCornerTopLeft | UIRectCornerTopRight)
                                                         cornerRadii:CGSizeMake(10.0, 10.0)];
    // Create the shape layer and set its path
    CAShapeLayer *maskLayer = [CAShapeLayer layer];
    maskLayer.frame = bounds;
    maskLayer.path = maskPath.CGPath;

    // Set the newly created shape layer as the mask for the image view's layer
    [capa addSublayer:maskLayer];
    capa.mask = maskLayer;

}