make library For Draw a line iphone sdk

make library For Draw a line iphone sdk

I am developing a library for a draw a line but UIView's or UIImageView's
touch method not called.
(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
i try but this method not calling in library. this code work fine in demo.