Round two corners of UIView

-(void) setMaskTo:(UIView*)view byRoundingCorners:(UIRectCorner)corners withRadius:(CGFloat)radius;
{
    UIBezierPath* rounded = [UIBezierPath bezierPathWithRoundedRect:view.bounds byRoundingCorners:corners cornerRadii:CGSizeMake(radius, radius)];
    CAShapeLayer* shape = [[CAShapeLayer alloc] init];
    [shape setPath:rounded.CGPath];

    view.layer.mask = shape;
}

// function Call
[self setMaskTo:view1 byRoundingCorners:UIRectCornerTopLeft|UIRectCornerBottomLeft withRadius:20.0];