- (void)touchesBegan: (CGPoint)point
{

   [path moveToPoint:point];
}

- (void)touchesMoved: (CGPoint)point
{
    [path addLineToPoint: point]; // (4)
    [self setNeedsDisplay];

 }

- (void)drawRect:(CGRect)rect {
    [[UIColor whiteColor] setStroke];
    [path stroke];
}