精灵不在萤幕上（左右）

Question

I am making a game with a Sprite that moves around the screen, I have created a collision for the edges using self.physicsBody = SKPhysicsBody(edgeLoopFromRect: self.frame) This seems to work for the top and bottom of the screen but the left and right sides the Sprite just moves off screen. I'm not sure why this is, appreciate any advice for a beginner. I included code for a scrolling background I have set up. I also have other enemy sprites spawning off screen and moving into view, maybe this effects the boundary?

class GameScene: SKScene, SKPhysicsContactDelegate{

struct PhysicsCategory {
  static let None      : UInt32 = 0
  static let All       : UInt32 = UInt32.max    
  static let Edge   : UInt32 = 0b1
  static let Spaceman: UInt32 = 0b10
  static let Ship: UInt32 = 0b11

}

override func didMoveToView(view: SKView) {
    /* Setup your scene here */



    self.physicsBody = SKPhysicsBody(edgeLoopFromRect: self.frame)
    self.physicsBody?.categoryBitMask = PhysicsCategory.Edge
    physicsWorld.contactDelegate = self


    // Repeating Background
    var bgTexture = SKTexture(imageNamed: "spacebackground")
    var movebg = SKAction.moveByX(-bgTexture.size().width, y: 0, duration: 9)
    var replacebg = SKAction.moveByX(bgTexture.size().width, y: 0, duration: 0)
    var moveForever = SKAction.repeatActionForever(SKAction.sequence([movebg, replacebg]))
    for var i:CGFloat=0; i<3; i++ {

        var wave = SKSpriteNode(texture: bgTexture)
        wave.position = CGPoint(x: bgTexture.size().width/2 + bgTexture.size().width * i, y: CGRectGetMidY(self.frame))
        wave.size.height = self.frame.height

        wave.runAction(moveForever)

        self.addChild(wave) 
    }


    Spaceman.texture = (Texture1)
    Spaceman.position = CGPoint(x: self.frame.size.width/2, y: self.frame.size.height/2)
   Spaceman.setScale(0.4)



    Spaceman.physicsBody=SKPhysicsBody(rectangleOfSize: TheBat.size)
    Spaceman.physicsBody?.affectedByGravity = true
    Spaceman.physicsBody?.dynamic = true
    Spaceman.physicsBody?.allowsRotation = false
    Spaceman.physicsBody?.categoryBitMask = PhysicsCategory.Spaceman
    Spaceman.physicsBody?.contactTestBitMask = PhysicsCategory.Ship
    Spaceman.physicsBody!.collisionBitMask = PhysicsCategory.Edge

    self.addChild(Spaceman)

Answer 1

Check to make sure your sceneview is set to the bounds of the viewcontroller, this should be done where you are adding the scene to the view, should be one of these

/* Set the scale mode to scale to fit the window */
    scene.size = skView.bounds.size
    scene.scaleMode = .ScaleToFit;

/* Set the scale mode to scale to fit the window */
    scene.size = skView.bounds.size
    scene.scaleMode = .AspectFit;

if it is .AspectFill, you will go outside the screen bounds.

Also do showPhysics = true in your SKView to display what your collision bounds are.