Not able to apply impulse to SKSpriteNode physics body - sprite-kit

Question

I am new to xcode's sprite kit and I'm an trying to apply an impulse to a SKSpriteNode's physics body.
Here is how I create the scene:
self.backgroundColor = [SKColor colorWithRed:0 green:0 blue:0 alpha:1.0];
self.physicsBody = [SKPhysicsBody bodyWithEdgeLoopFromRect:self.frame];
self.physicsBody.friction = 0.0f;
self.physicsWorld.gravity = CGVectorMake(0.0f, 0.0f);
ballCategory = 1;
wallCategory = 2;
self.physicsBody.categoryBitMask = wallCategory;
Here is how I create the player AND give it its impulse:
player = [SKSpriteNode spriteNodeWithImageNamed:filePath];
player.size = CGSizeMake(100, 100);
player.position = CGPointMake(150, 250);
player.physicsBody = [SKPhysicsBody bodyWithEdgeLoopFromRect:player.frame];
player.physicsBody.categoryBitMask = ballCategory;
player.physicsBody.collisionBitMask = wallCategory;
player.physicsBody.friction = 0.0f;
player.physicsBody.restitution = 1.0f;
player.physicsBody.linearDamping = 0.0f;
player.physicsBody.allowsRotation = NO;
[self addChild:player];
CGVector impulse = CGVectorMake(100,100);
[player.physicsBody applyImpulse:impulse];
Is there anything obvious that I am missing because I've been following the iOS Developer Library Sprite Kit Programming Guide perfectly? Thanks in advance for the help!

Answer 1

You are creating the player's physicsBody as an edge body - these are always static (immovable by forces/impulses). You should change that line to:
player.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:player.frame.size];
This example makes it a dynamic volume based on a rectangle which will be affected by physics forces. You can read up on the types of physics bodies here.