how to remove a UIView from the collision behavior in swift -

i have been programming break out app swift class , have been able figure out except how remove 1 of top paddles collision behavior. if tell me how remove collisionbehavior's array of items, great. thank you.

set dynamic flag false?

the default value yes. if value no, physics body ignores forces , impulses applied it. property ignored on edge-based bodies; automatically static.

skphysicsbody class reference