swift scenekit 类 viewcontroller 没有初始化器

Question

我完全按照教程进行操作，当教程说要运行程序时，我收到错误消息，“类 gameviewcontroller 没有初始化器”

我完全复制了它，所以我不知道哪里出了问题，但我认为可能是我检索节点时出现的问题。

var cameraNode: SCNNode
var shelfNode: SCNNode
var baseCanNode: SCNNode

func createScene(){

cameraNode = levelScene.rootNode.childNode(withName: "camera", recursively: true)!
shelfNode = levelScene.rootNode.childNode(withName: "shelf", recursively: true)!

guard let canScene = SCNScene(named: "resources.scnassets/Can.scn") else { return }
baseCanNode = canScene.rootNode.childNode(withName: "can", recursively: true)!
}

请告诉我我做错了什么。

谢谢。

Answer 1

只在末尾加上感叹号

var cameraNode: SCNNode!
var shelfNode: SCNNode!
var baseCanNode: SCNNode!

代替

var cameraNode: SCNNode
var shelfNode: SCNNode
var baseCanNode: SCNNode