如何在 SwiftUI 中更改 SceneView 3D 对象的背景颜色

Question

有人知道如何更改 SceneView 对象的背景颜色吗？ 我正在尝试将背景属性放置到 SceneView，但它并没有改变它，仍然具有默认背景。In this case I wanted to the background be green, but it's keeps gray/white

import SwiftUI
import SceneKit

struct ContentView: View {
    var body: some View {
    
        ZStack{
            Color.red
            SceneView(
                scene: SCNScene(named: "Earth.scn"),
                options: [.autoenablesDefaultLighting,.allowsCameraControl]
            )
            .frame(width: UIScreen.main.bounds.width, height: UIScreen.main.bounds.height/2, alignment: .center)
            .background(Color.green)
            .border(Color.blue, width: 3)
        
        }
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}

Answer 1

您看到的灰色来自SCNScene 的background 属性。您需要将其设置为UIColor.green。

struct ContentView: View {
    var body: some View {
        
        ZStack{
            Color.red
            SceneView(
                scene: {
                    let scene = SCNScene(named: "Earth.scn")!
                    scene.background.contents = UIColor.green /// here!
                    return scene
                }(),
                options: [.autoenablesDefaultLighting,.allowsCameraControl]
            )
            .frame(width: UIScreen.main.bounds.width, height: UIScreen.main.bounds.height/2, alignment: .center)
            .border(Color.blue, width: 3)
            
        }
    }
}

结果：