如何在SpriteKit中为场景制作边框

Question

I am trying to make border for the two sides in a scene but there is some kind of error the here is the code i used

let leftEdge : SKNode = SKNode()
            leftEdge.physicsBody = SKPhysicsBody(edgeFromPoint: CGPointZero, toPoint: CGPointMake(0.0, self.size.height + 100))

            leftEdge.position = CGPointZero;

            self.addChild(leftEdge)

            let rightEdge : SKNode = SKNode()
            rightEdge.physicsBody = SKPhysicsBody(edgeFromPoint: CGPointZero, toPoint: CGPointMake(0.0, self.size.height + 100))
            rightEdge.position = CGPointMake(self.size.width, 0.0);

            self.addChild(rightEdge)

but the top border and bottom border get the borders and the two sides its seems like they have border outside the the scene cause i shoot object toward them it goes out of the scene and get back so the question how i make borders only for the two sides the left and the right

Answer 1

try this

let border = SKPhysicsBody(edgeLoopFrom: self.frame)
    border.friction = 0
    border.restitution = 1
    self.physicsBody = border

obviously you can add your own physics to your border.