how to detect two nodes collision point in Sprite kit and objective c

Question

I have two SKSpriteNode's, i know how to detect if they are in same place, but I cant figure out how to detect in which place of node they have collision. I particular want to know one of nodes collision place, because I want to add different applyImpulse on nodes height ends, so another node will change direction.

Answer 1

didBeginContact is passend an SKPhysicsContact when 2 bodies collide. SKPhysocsContact has a property contactPoint which is a CGPoint and is the contact point between the two physics bodies, in scene coordinates. From this and the positions of your 2 bodies when they collide, you could work out where exactly on the bodies the collision took place.

Answer 2

You can get the contact point like:

CGPoint collidedPoint = contact.contactPoint;

You can get the x & y points like below:

NSLog(@"collidedPoint x= %f | %f",collidedPoint.x,collidedPoint.y); 
// Prints like: collidedPoint x= 424.855835 | 46.139378

Keep Coding........ :)