截屏 & 錄制

可能是由于SceneKit原本是設(shè)計(jì)用來做游戲渲染的框架，只提供了一個(gè)截屏的接口snapshot，拍照尚可調(diào)用，而錄制并不是特別方便。

首先有一個(gè)view：

@IBOutlet var sceneView: ARSCNView!

截屏

ps：截屏中可以看到AR物體

截屏：獲取UIImage對(duì)象

let re = SCNRenderer(device: sceneView.device, options: nil)
re.scene = sceneView.scene
let image = re.snapshot(atTime: CACurrentMediaTime(), with: UIScreen.main.bounds.size, antialiasingMode: .multisampling4X)

錄制

要設(shè)置session的代理，代理中返回?cái)?shù)據(jù)

ps：錄制中不可以看到AR物體，只有攝像頭畫面

sceneView.session.delegate = self
func session(_ session: ARSession, didUpdate frame: ARFrame) {
    let cvBuffer = frame.capturedImage
}

錄制中如果需要同時(shí)有AR物體，還有另外一種錄制方法

//ARSCNView的代理
func renderer(_ renderer: SCNSceneRenderer, didAdd node: SCNNode, for anchor: ARAnchor) {
    renderer.delegate = self
}
//SCNSceneRenderer的代理
func renderer(_ renderer: SCNSceneRenderer, updateAtTime time: TimeInterval) {
    if renderer.currentRenderPassDescriptor.colorAttachments[0].texture == nil {
        return
    }
    let t = renderer.currentRenderPassDescriptor.colorAttachments[0].texture!
    var outPixelbuffer: Unmanaged<CVPixelBuffer>?
    if t.iosurface == nil {
        return
    }
    CVPixelBufferCreateWithIOSurface(kCFAllocatorDefault, t.iosurface!, nil, &outPixelbuffer)
    let buffer = outPixelbuffer?.takeRetainedValue()
}