SpriteKit:子节点不与父SKNode一起旋转

The goal is to rotate a physics body around a point using angular velocity, not zRotation. Because of this, it seems necessary to add a second physics body (the one controlling the rotations), but changing the angular velocity on this parent doesn't move the child. In other words, the parent rotates, but the child remains in place.The goal is to rotate a physics body around a p