Is it possible to deactivate collisions in physics bodies in spriteKit?

Question

I\'m looking at doing the best way to collect items with my hero in my spriteKit game for iOs, and after to try a few ways to do it, my conclusion is the best way would be t

Answer 1

you can do this by setting the categoryBitMask and contactBitMasks of the player and the item objects, but making sure that you do not set the collisionBitMask for either to interact with each other (see below)

static const int playerCategory = 1;
static const int worldCategory = 2;
static const int objectCategory = 4;    

....

SKSpriteNode *player, *item;

....

player.physicsBody.categoryBitMask = playerCategory;
player.physicsBody.collisionBitMask = worldCategory;
player.physicsBody.contactTestBitMask = worldCategory;

....

item.physicsBody.categoryBitMask = objectCategory;
item.physicsBody.contactTestBitMask = playerCategory | worldCategory;
item.physicsBody.collisionBitMask = worldCategory;

this way the physics body will pick up collisions between the player and world objects, the item and world objects, but not between the player and items. It will trigger a call to didBeginContact, where you can delete your item node, add health, etc.

Hope this helps!