Apple Game Frameworks and Technologies

Add Code to Destroy Collectibles

Switch back to the Player.swift file, and in the attack() method, above the line that reads var throwDirection = CGVector(dx: 0, dy: 0), add the following code:

// Set up physics for projectile
let physicsBody = SKPhysicsBody(rectangleOf: projectile.size)

physicsBody.affectedByGravity = false
physicsBody.allowsRotation = true
physicsBody.isDynamic = true

physicsBody.categoryBitMask = PhysicsBody.projectile.categoryBitMask
physicsBody.contactTestBitMask = PhysicsBody.projectile.contactTestBitMask
physicsBody.collisionBitMask = PhysicsBody.projectile.collisionBitMask

projectile.physicsBody = physicsBody

This sets the projectile’s physics body to use the projectile category.

Next, ...