Can one parent claim abandonment even if that parent wont let you see the child?

The problem with this issue becomes how to prove that the other parent was not allowing you to see the child. It quickly becomes a he said she said whether the child was abandoned. That being said, a divorce does not have to be filed in order to obtain time sharing so the parent not being allowed access has to request court assistance as soon as possible in order to short circuit the abandonment argument.