一定时间后修改 sceneView.pointOfView

Question

在一段时间后通过代码修改 sceneView.pointOfView 属性时，更新的 pointOfView 值不会立即影响 3D 模型，直到发生点击或与模型交互。为什么会出现这种行为？我们该如何解决这个问题？

我更新pointOfView的代码：

import SceneKit

func setupScene() {
    
    guard let scene = SCNScene(named: mockup.fileName) else  {
        print("Unable to load scene file.")
        return
    }
    
    sceneView.allowsCameraControl = true
    sceneView.backgroundColor = .clear
    sceneView.autoenablesDefaultLighting = true
    sceneView.isJitteringEnabled = true
    sceneView.isPlaying = false
    sceneView.scene = scene
    
    
    // If we update the point of view directly, there is no problem.
    //updatePointOfViewAfter(seconds: 0)
    
    // Updating after a few seconds will not take effect unless the user taps or interacts with the 3D model.
    updatePointOfViewAfter(seconds: 3)
    
}


func updatePointOfViewAfter(seconds: Double) {

    DispatchQueue.main.asyncAfter(deadline: .now() + seconds) {
        if let newPointOfView = self.sceneView.pointOfView {
            newPointOfView.position = SCNVector3(x: newPointOfView.position.x + 10,
                                                 y: newPointOfView.position.y + 10,
                                                 z: newPointOfView.position.z + 10)
            
            self.sceneView.pointOfView = newPointOfView
        }
    }
    
}

Answer 1

我不太确定，但在这里尝试一下（在场景视图配置期间）

sceneView.rendersContinuously = true