CODEWITHSUNDEEP
xcodeswiftswift2xcode7
Larisa
Larisa

Reputation: 791

Define physicsBody of a SKSpriteNode in a separate SKSpriteNode subclass - Swift2

I have a class called Bird, that is a SKSpriteNode. I do have it initialized, but I can't figure out how to set physicsBody and other properties of it in that same class rather than in GameScene class.

Bird class:

import SpriteKit

class Bird: SKSpriteNode {

    init() {
        let texture = SKTexture(imageNamed: "birdy")
        let size = texture.size()

        super.init(texture: texture, color: UIColor.clearColor(), size: CGSizeMake(size.width/4, size.height/4))
        }

        required init?(coder aDecoder: NSCoder) {
            fatalError("init(coder:) has not been implemented")
        }
    }

A function for setting the properties of Bird in GameScene:

var birdSprite: Bird!

func setupBird() {
    birdSprite = Bird()
    birdSprite.position = CGPointMake(size.width*0.5, size.height*0.2)
    birdSprite.zPosition = Layer.Bird.rawValue
    self.addChild(birdSprite)

    birdSprite.physicsBody = SKPhysicsBody(circleOfRadius: birdSprite.size.width/2)
    birdSprite.physicsBody?.categoryBitMask = PhysicsCategory.Bird
    birdSprite.physicsBody?.collisionBitMask = PhysicsCategory.None
    birdSprite.physicsBody?.contactTestBitMask = PhysicsCategory.Desk
    birdSprite.physicsBody?.allowsRotation = false
    birdSprite.physicsBody?.restitution = 0
    birdSprite.physicsBody?.usesPreciseCollisionDetection = true
}

I tried setting its physics body by defining it in Bird class, with self.physicsBody = ..., but that gave me an error, as well as setting it the same way inside the init function, so I didn't include it here in the code.

The reason I want to do it in a separate class is that I would like to learn how to write well organized code, so that the code would be more readable and self explanatory. But I am more or less a beginner at Swift and programming in general, so the lack of experience and knowledge is giving me some troubles.

Any help or suggestion is welcome!

Upvotes: 0

Views: 368

Answers (1)

Ivens Denner
Ivens Denner

Reputation: 533

Have you tried to set these properties after the call to super.init()?

Since the properties you want to set are from the superclass, these can only be setted after this call, like in:

init() {
    let texture = SKTexture(imageNamed: "birdy")
    let size = texture.size()

    super.init(texture: texture, color: UIColor.clearColor(), size: CGSizeMake(size.width/4, size.height/4))

    self.physicsBody = SKPhysicsBody(circleOfRadius: self.size.width/2)
}

I don't know exactly what did you do first in the init(), but maybe this is the case.

Upvotes: 2

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