My physics Contacts do not make contact with SpriteKit

Question

This is the first question I wrote on the stack. I use Xcode 7.3.1, iOS 9.3 and Swift 2. Also tested directly on the simulator and my iPad. I conducted numerous searches, read 2 Spritekit physics books, and watched numerous video tutorials as well as written ones. I already wrote body physics without problems, and many times with smaller projects, but this one just doesn't give me feedback. This question was asked here earlier in specific cases, i.e. 2 collisions with the same spriton or what is the difference between collisionBitMask and contactTestBitMask. I know about the differences and also know that every object you want to contact needs a BitMask category. Firstly, I assigned the global Physicalbody structure (I tried the binary bitmask and the corresponding Int32, corresponding to each of them without success) or the physical delegate,and each SKSpritenode corresponds to its paired contacts / s. I tried many ways to implement didBeginContact (regarding how it is structured), none of them changed the other. I used to mention feedback. I destroyed everyone except my main player, bullet, newEnemy and the enemy. When I try to even print the result of a contact or a collision with the console, it looks like it is not even readable. I have no activity. These spritenodes are within class 1 (GameScene), I tried separate classes for each functional sprinoid without any luck. In addition, with separate classes, it seems that everything is getting worse even if there are protocols for communication between classes and subclasses. Which, using separate classes, is still new to me, but I know this is the preferred way. I will only show the code which,I believe should be seen to minimize, but let me know if there is anything else to see. I just want the bullets to hit the planes, and I can go from there to other objects.

import AVFoundation
import SpriteKit
import GameKit

// Binary connections for collision and colliding
struct PhysicsCategory {
    static let GroundMask : UInt32 = 1    //0x1 << 0
    static let BulletMask : UInt32 = 2    //0x1 << 1
    static let PlayerMask : UInt32 = 4    //0x1 << 2
    static let EnemyMask  : UInt32 = 8    //0x1 << 3
    static let EnemyFire  : UInt32 = 16   //0x1 << 4
    static let All        : UInt32 = UInt32.max // all nodes
}

class GameScene: SKScene, SKPhysicsContactDelegate {

    // Starting scene, passed to didMoveToView
    func startScene() {

        // Sets the physics delegate and physics body
        view?.showsPhysics = true
        self.physicsWorld.gravity = CGVectorMake(0, 0)
        self.physicsBody = SKPhysicsBody(edgeLoopFromRect: self.frame)
        self.physicsWorld.contactDelegate = self // Physics delegate set
    }

    func setupPlayer() {

        player = SKScene(fileNamed: "Player")!.childNodeWithName("player")! as! SKSpriteNode

        // Body physics for player planes
        player.physicsBody = SKPhysicsBody(texture: SKTexture(imageNamed: "MyFokker2.png"), size: player.size)
        player.physicsBody?.dynamic = false
        player.physicsBody?.usesPreciseCollisionDetection = true
        player.physicsBody?.categoryBitMask = PhysicsCategory.PlayerMask
        player.physicsBody?.contactTestBitMask = PhysicsCategory.EnemyFire
        player.physicsBody?.collisionBitMask = 0

        player.removeFromParent()
        self.addChild(player) // Add our player to the scene
    }

    // Create the ammo for our plane to fire
    func fireBullets() {

        bullet = SKSpriteNode(imageNamed: "fireBullet")

        // Body physics for plane bulets
        bullet.physicsBody = SKPhysicsBody(rectangleOfSize: bullet.size)
        bullet.physicsBody?.dynamic = false
        bullet.physicsBody?.usesPreciseCollisionDetection = true
        bullet.physicsBody?.categoryBitMask = PhysicsCategory.BulletMask
        bullet.physicsBody?.contactTestBitMask = PhysicsCategory.EnemyMask
        bullet.physicsBody?.collisionBitMask = 0

        self.addChild(bullet) // Add bullet to the scene
    }

    func spawnEnemyPlanes() {
        let enemy1 = SKScene(fileNamed: "Enemy1")!.childNodeWithName("enemy1")! as! SKSpriteNode
        let enemy2 = SKScene(fileNamed: "Enemy2")!.childNodeWithName("enemy2")! as! SKSpriteNode
        let enemy3 = SKScene(fileNamed: "Enemy3")!.childNodeWithName("enemy3")! as! SKSpriteNode
        let enemy4 = SKScene(fileNamed: "Enemy4")!.childNodeWithName("enemy4")! as! SKSpriteNode

        enemyPlanes = [enemy1, enemy2, enemy3, enemy4]

        // Generate a random index
        let randomIndex = Int(arc4random_uniform(UInt32(enemyPlanes.count)))

        // Get a random enemy
        newEnemy = (enemyPlanes[randomIndex])

        // Added randomEnemy physics
        newEnemy.physicsBody = SKPhysicsBody(rectangleOfSize: newEnemy.size)
        newEnemy.physicsBody?.dynamic = false
        newEnemy.physicsBody?.usesPreciseCollisionDetection = true
        newEnemy.physicsBody?.categoryBitMask = PhysicsCategory.EnemyMask
        newEnemy.physicsBody?.contactTestBitMask = PhysicsCategory.BulletMask
        newEnemy.physicsBody?.collisionBitMask = 0

        newEnemy.removeFromParent()
        self.addChild(newEnemy)
    }

    func spawnEnemyFire() {

        enemyFire = SKScene(fileNamed: "EnemyFire")!.childNodeWithName("bullet")! as! SKSpriteNode

        enemyFire.removeFromParent()
        self.addChild(enemyFire) // Generate enemy fire

        // Added enemy fire physics
        enemyFire.physicsBody = SKPhysicsBody(rectangleOfSize: enemyFire.size)
        enemyFire.physicsBody?.dynamic = false
        enemyFire.physicsBody?.usesPreciseCollisionDetection = true
        enemyFire.physicsBody?.categoryBitMask = PhysicsCategory.EnemyFire
        enemyFire.physicsBody?.contactTestBitMask = PhysicsCategory.PlayerMask
        enemyFire.physicsBody?.collisionBitMask = 0
    }

    func didBeginContact(contact: SKPhysicsContact) {

        if !self.gamePaused && !self.gameOver {

            // beginContact constants
            firstBody = contact.bodyA
            secondBody = contact.bodyB

            if (contact.bodyA.categoryBitMask < contact.bodyB.categoryBitMask) {    
                firstBody = contact.bodyA
                secondBody = contact.bodyB
            } else {   
                firstBody = contact.bodyB
                secondBody = contact.bodyA
            }

            // Contact statements
            if ((firstBody.categoryBitMask & PhysicsCategory.BulletMask != 0) && (secondBody.categoryBitMask & PhysicsCategory.EnemyMask != 0)) {   
                print("Bullet hit Enemy")
            }
            else if ((firstBody.categoryBitMask & PhysicsCategory.PlayerMask != 0) && (secondBody.categoryBitMask & PhysicsCategory.EnemyFire != 0)) {
                print("EnemyFire hit our Player")
            }
        }
    }
}

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Answer 1

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