How to properly fix contacts in SpriteKit? - xcode

Question

I use this code and it has to work, but it doesn't:
static const uint32_t platformCategory = 0x1 << 1;
static const uint32_t playerCategory = 0x1 << 2;
Code of player:
self.player = [SKSpriteNode spriteNodeWithImageNamed:#"player"];
self.player.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:self.player.size];
self.player.physicsBody.dynamic = false;
self.player.physicsBody.friction = 0;
self.player.physicsBody.usesPreciseCollisionDetection = true;
self.player.physicsBody.categoryBitMask = playerCategory;
self.player.physicsBody.collisionBitMask = platformCategory;
self.player.physicsBody.contactTestBitMask = platformCategory;
[self addChild:self.player];
And code of "platforms":
- (void)addPlatformRight {
int plType = arc4random()%3;
SKSpriteNode * platform = [SKSpriteNode spriteNodeWithImageNamed:[NSString stringWithFormat:#"platform%d", plType]];
platform.position = CGPointMake(self.frame.size.width+100, self.frame.size.height-200);
platform.size = CGSizeMake(platform.size.width*1.2, platform.size.height*2);
platform.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:platform.size];
platform.physicsBody.dynamic = false;
platform.physicsBody.friction = 0;
platform.physicsBody.usesPreciseCollisionDetection = true;
platform.physicsBody.categoryBitMask = platformCategory;
platform.physicsBody.contactTestBitMask = playerCategory;
platform.physicsBody.collisionBitMask = playerCategory;
[self addChild:platform];
[platform runAction:[SKAction sequence:#[[SKAction rotateByAngle:M_PI/4.0*8 duration:3], [SKAction removeFromParent]]]];
}
And
- (void)didBeginContact:(SKPhysicsContact *)contact {
NSLog(#"contact");
}
Unfortunately, this doesn't work. Are there any errors?

Answer 1

two overlapping non-dynamic bodies do not generate contact events, at least one of them has to be dynamic