“But my child doesn’t comply when I offer “Yes-When deals” Instead of obeying, he throws tantrums or hits!”

Everyone
wins
with “Yes-When deals”, regardless of your child’s response.  Here’s why:  If your
child does not give you the compliance that you are requesting in your “Yes-When
deal’, then you withhold the privilege that he wants.  If (or when!) your child
tantrums or hits, you continue to withhold the privilege.  It’s “magic.”  Your
child eventually (over the course of his entire
toddler-hood/child-hood/adolescence) learns a very valuable lesson: “Tantrums
get me nothing and nowhere,” and “I can earn many privileges without throwing a
tantrum or hitting (by just following along with some simple ‘Yes-When deals’!” 
If you view the “Yes-When deal” as a way of life and a long-term tool,
then you will be able to view your child’s resistance, tantrums, or aggressive
behavior simply as a necessary early part of the long-term learning process. 
Have patience, set reasonable criteria in your “Yes-When deal”, and maintain
consistency.