ios - Swift physicsbody 边缘识别问题

Question

以下代码识别场景的底部和顶部边缘，并且球按预期反弹。然而，场景的左边缘和右边缘总是被破坏。如果施加足够的力，球会离开屏幕然后最终返回。就好像场景的边缘超出了iphone模拟器窗口的边缘。有人可以帮忙吗？谢谢。

import SpriteKit

class GameScene: SKScene {
    override func didMoveToView(view: SKView){
        self.physicsBody = SKPhysicsBody(edgeLoopFromRect: self.frame)
        backgroundColor = UIColor.cyanColor()
        var ball = SKSpriteNode(imageNamed: "ball")
        ball.position = CGPoint(x: self.size.width/2, y: self.size.height/2)
        self.addChild(ball)
        ball.physicsBody = SKPhysicsBody(circleOfRadius: ball.frame.size.height/2)
        let push = CGVectorMake(10, 10)
        ball.physicsBody.applyImpulse(push)

    }
}

Answer 1

例如，您可以尝试更改 self.physicsBody 的大小；

self.physicsBody = SKPhysicsBody(edgeLoopFromRect: CGRectMake(self.frame.origin.x, self.frame.origin.y, self.size.width, self.size.height))

并根据需要更改参数self.size.width