Question

大家好，我正在尝试使用swift进行xcode 6的基本线条绘制测试。但我的碰撞系统根本不起作用。这是我的碰撞系统的代码：

func drawLines() {
     CGPathMoveToPoint(path, nil, location.x, location.y)
     CGPathAddLineToPoint(path, nil, self.frame.size.width/2, self.frame.size.height / 5)

     drawLine.append(SKShapeNode())
     drawLine[index] = SKShapeNode()

     line.append(drawLine[index])
     line[index].path = path
     line[index].strokeColor = UIColor.redColor()
     line[index].lineWidth = 5.0
     line[index].physicsBody = SKPhysicsBody(rectangleOfSize: line[index].frame.size)
     line[index].physicsBody.dynamic = false
     line[index].zPosition = 1
     self.addChild(line[index])
     index++
}

我无法弄清楚问题，但我认为我在那段代码中犯了一个错误。这是我的其余代码：

class GameScene: SKScene {

var line: [SKShapeNode] = []
var drawLine: [SKShapeNode] = []
var path = CGPathCreateMutable()
var touch: UITouch!
var location:CGPoint!
var index = 0
let player = SKSpriteNode(imageNamed: "player")

override func didMoveToView(view: SKView) {

    player.position = CGPointMake(self.frame.size.width / 2, self.frame.size.height / 2)
    player.physicsBody = SKPhysicsBody(rectangleOfSize: player.size)
    player.physicsBody.dynamic = true
    self.physicsWorld.gravity = CGVectorMake(0,-1)
    player.zPosition = 1
    self.addChild(player)
}

override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
    /* Called when a touch begins */
    touch = touches.anyObject() as UITouch!
    location = touch.locationInNode(self)
    drawLines()
}

func drawLines() {
    CGPathMoveToPoint(path, nil, location.x, location.y)
    CGPathAddLineToPoint(path, nil, self.frame.size.width/2, self.frame.size.height / 5)

    drawLine.append(SKShapeNode())
    drawLine[index] = SKShapeNode()

    line.append(drawLine[index])
    line[index].path = path
    line[index].strokeColor = UIColor.redColor()
    line[index].lineWidth = 5.0
    line[index].physicsBody = SKPhysicsBody(rectangleOfSize: line[index].frame.size)
    line[index].physicsBody.dynamic = false
    line[index].zPosition = 1
    self.addChild(line[index])
    index++

}



override func update(currentTime: CFTimeInterval) {
    /* Called before each frame is rendered */
}

-------------------编辑-------------------

我现在将这行代码用于我的线的物理学：

line[index].physicsBody = SKPhysicsBody(rectangleOfSize: 
          CGSizeMake(line[index].frame.width*2 ,line[index].frame.height*2))

我认为这个问题是，当我以某个角度绘制线条时，矩形不会随之转动，所以我的矩形最终会变大。

Answer 1

据我所知，touchesBegan会返回一个NSSet个触摸（粗略的触摸数组），因此您可能希望循环遍历它们或通过其索引访问特定触摸。我建议像下面的代码一样循环浏览。

override func touchesBegan(touches:NSSet) {
    for touch: AnyObject in touches {
        var location:CGPoint = touch.locationInNode(self.scene)
        performSomethingCrazy(withLocationAt: location)
    }
}

享受。

sprite-kit碰撞无法正常工作

1 个答案: