How to add Wishlist button field in views in drupal 7?
Most straightforward way is to use views to render your product display nodes. Instead of "fields" choose "node" and then choose your display mode. Perhaps use display_suite or panels to get more advanced control over what your products look like when rendered.

Sidenote, there's a great video I created that shows you how to use hook_form_alter to move the wishlist button around.