我有一个SKShapeNode,我无法应用冲动。我的问题是什么?感谢
代码:
var ball = SKShapeNode()
ball.path = UIBezierPath(roundedRect: CGRect(x:-ballWidth/2, y: -ballHeight/2, width: ballWidth, height: ballHeight), cornerRadius: 64).cgPath
ball.position = CGPoint(x: self.frame.width / 2, y: self.frame.height / 2)
ball.physicsBody = SKPhysicsBody(circleOfRadius: CGFloat(ballWidth / 2));
ball.physicsBody?.affectedByGravity = false
ball.physicsBody?.isDynamic = false
ball.physicsBody?.categoryBitMask = ballCategory
ball.physicsBody?.collisionBitMask = enemyCategory
ball.physicsBody?.contactTestBitMask = enemyCategory
ball.isHidden = false
ball.fillColor = UIColor.blue
ball.strokeColor = UIColor.white
ball.lineWidth = 10
ball.name = "ball"
ball.zPosition = 0
addChild(ball)
ball.physicsBody?.applyImpulse(CGVector(dx: 50, dy: 50))
答案 0 :(得分:4)
ball.physicsBody?.isDynamic = false
意味着忽略冲动和其他力量。您需要将此设置为true。