SKPhysicsJointFixed is not binding two nodes together

Question

I'm teaching myself swift while recuperating from back surgery and everyone's help has been awesome while I'm learning swift. I apologize if this seems super simple but I figure it might help the next guy.

I've read the Apple Documentation on fixed joints and was struggling to get this to work. You will notice that the joint is present but doesn't lock the two together.

This seems like a simple fix (and is) but hopefully this will help someone. When you are adding your joint the documentation shows: joint(withBodyA:bodyB:anchor:) For this to work you need to make sure you enter in your sprite to be joined as the "withBodyA" body.

Answer 1

My "bad" joint:

    let jointFixed = SKPhysicsJointFixed.jointWithBodyA(zombie1.physicsBody!, bodyB: zombie2.physicsBody!, anchor: z1.position)
    self.physicsWorld.addJoint(jointFixed)

The fix is to make sure the sprite you are joining to is the first variable:

    let jointFixed = SKPhysicsJointFixed.jointWithBodyA(zombie2.physicsBody!, bodyB: zombie1.physicsBody!, anchor: z1.position)
    self.physicsWorld.addJoint(jointFixed)

As always, triple reading the documentation is the key.