arkit场景视图仅显示1个arkit对象

Question

我下面的代码只显示在触摸1个arkit对象开始功能。我希望用户能够在arkit场景视图中显示几个相同arkit对象。现在作为下一个被放置在另外一个被删除的用户可以放置一个图像，但一旦。

   override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {

    //Handle the shooting
    guard let frame = sceneView.session.currentFrame else { return }
    let camMatrix = SCNMatrix4(frame.camera.transform)
    let direction = SCNVector3Make(-camMatrix.m31 * 5.0, -camMatrix.m32 * 10.0, -camMatrix.m33 * 5.0)
    let position = SCNVector3Make(camMatrix.m41, camMatrix.m42, camMatrix.m43)
    let scene = SCNScene(named: "art.scnassets/dontCare.scn")!

    // Set the scene to the view
 sceneView.scene = scene
}

Answer 1

傻米莉，每次你改变整个场景，而是将节点添加到sceneView.scene

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {


guard let frame = sceneView.session.currentFrame else { return }
let camMatrix = SCNMatrix4(frame.camera.transform)

let position = SCNVector3Make(camMatrix.m41, camMatrix.m42, camMatrix.m43)
let object = SCNScene(named: "art.scnassets/dontCare.scn")!.rootNode
object.position = position

sceneView.scene.rootNode.addChildNode(object)

}

Answer 2

你必须加上ARSCNView多个子节点

let careScene = SCNScene.init(named: "art.scnassets/dontCare.scn")
let childNode = (careScene?.rootNode.childNode(withName: "Frame", recursively: false))!
childNode.position = SCNVector3(x,y,z)
scenView.scene.rootNode.addChildNode(childNode)