线上地址
https://itunes.apple.com/cn/app/weare/id1304227680?mt=8
开源地址
https://github.com/SherlockQi/HeavenMemoirs

WeAre.gif

技术点

AR初始化

在新建项目时可以直接创建 AR 项目, xcode 会创造一个 AR 项目的模板.

也可以创建普通的项目,在需要实现 AR 功能的控制器中实现如下代码进行初始化.

   import ARKit
   let sceneView = ARSCNView()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        sceneView.frame = view.bounds
        view.addSubview(sceneView)

        sceneView.delegate = self
        sceneView.showsStatistics = true
      
        // 创建一个场景,系统默认是没有的
        let scene = SCNScene()
        sceneView.scene = scene

          //不允许用户操作摄像机
         sceneView.allowsCameraControl = false
          //抗锯齿
         sceneView.antialiasingMode = .multisampling4X

    }
    
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        let configuration = ARWorldTrackingConfiguration()
        sceneView.session.run(configuration)
    }
    
    override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)
        sceneView.session.pause()
    }

添加节点

        //我使用的是 SCNPlane 来充当相框,也可以使用"厚度"很小的 SCNBox
        let photo = SCNPlane(width: 1, height: 1)
        //photo.cornerRadius = 0.01
        let image = UIImage(named: "0")
        //纹路可以使图片,也可以是颜色
        photo.firstMaterial?.diffuse.contents = image
        //photo.firstMaterial?.diffuse.contents = UIColor.red
        let photoNode = SCNNode(geometry: photo)
        //节点的位置
        let vector3 = SCNVector3Make(-1, -1, -1) 
        photoNode.position = vector3
        sceneView.scene.rootNode.addChildNode(photoNode)

         let text = SCNText(string: "文字", extrusionDepth: 0.1)
         text.font = UIFont.systemFont(ofSize: 0.4)
         let textNode = SCNNode(geometry: text)
         textNode.position = SCNVector3Make(0,0, -1)
         //文字的图片/颜色
         text.firstMaterial?.diffuse.contents = UIImage(named: color)
         sceneView.scene.rootNode.addChildNode(textNode)

可供选择的几何图形
SCNText 文字  
SCNPlane 平面  
SCNBox 盒子  
SCNPyramid 锥形  
SCNSphere 球  
SCNCylinder 圆柱  
SCNCone 圆锥  
SCNTube 圆筒  
SCNCapsule 胶囊  
SCNTorus 圆环  
SCNFloor 地板  
SCNShape 自定义

全景图实现

想象自己站在一个球的球心处,球的内表面涂着壁画,那么是不是就实现了全景图.
所以用一个Sphere 节点包裹着相机节点(也就是0位置节点),再设置Sphere节点的内表面纹理,就实现了功能.
        let sphere = SCNSphere(radius: 15)
        let sphereNode = SCNNode(geometry: sphere)
        sphere.firstMaterial?.isDoubleSided = true
        sphere.firstMaterial?.diffuse.contents = image
        sphereNode.position = SCNVector3Zero
        scene.rootNode.addChildNode(sphereNode)

播放视频

            let height:CGFloat = CGFloat(width) * videoSize.height/videoSize.width
            let box = SCNBox(width: width, height: height, length: 0.3, chamferRadius: 0)
            boxNode.geometry = box;
            boxNode.geometry?.firstMaterial?.isDoubleSided = true
            boxNode.position = SCNVector3Make(0, 0, -5);
            box.firstMaterial?.diffuse.contents = UIColor.red
            self.scene.rootNode.addChildNode(boxNode);
            
            
            let avplayer = AVPlayer(url: url)
            avplayer.volume = rescoucceConfiguration.video_isSilence ? 0.0 : 3.0
            videoPlayer = avplayer
            let videoNode = SKVideoNode(avPlayer: avplayer)
            NotificationCenter.default.addObserver(self, selector: #selector(playEnd(notify:)), name: NSNotification.Name.AVPlayerItemDidPlayToEndTime, object: nil)
            
            videoNode.size = CGSize(width: 1600, height: 900)
            videoNode.position = CGPoint(x: videoNode.size.width/2, y: videoNode.size.height/2)
            videoNode.zRotation = CGFloat(Float.pi)
            let skScene = SKScene()
            skScene.addChild(videoNode)
            skScene.size = videoNode.size
            box.firstMaterial?.diffuse.contents = skScene
            videoNode.play()

粒子效果

            /*
              particleName = "bokeh.scnp"
              particleName = "rain.scnp"
              particleName = "confetti.scnp"
            **/
            particleSytem = SCNParticleSystem(named: particleName, inDirectory: nil){
            particleNode.addParticleSystem(particleSytem)
            particleNode.position = SCNVector3Make(0, Y, 0)
            self.scene.rootNode.addChildNode(particleNode)

节点点击事件

      //给 场景视图sceneView 添加点击事件
       let tap = UITapGestureRecognizer(target: self, action: #selector(tapHandle(gesture:)))
       sceneView.addGestureRecognizer(tap)

  @objc func tapHandle(gesture:UITapGestureRecognizer){
        let results:[SCNHitTestResult] = (self.sceneView?.hitTest(gesture.location(ofTouch: 0, in: self.sceneView), options: nil))!
        guard let firstNode  = results.first else{
            return
        }
        // 这就是点击到的节点 可以对他做一些事情 或者根据这个节点的某些属性执行不同的方法
        let node = firstNode.node.copy() as! SCNNode
        if firstNode.node == self.selectNode {
            ...推远照片...
        }else{
            ...拉近照片...
            selectNode = node
        }
    }

节点动画

我的另一篇文章中有详细记录ARKit-动画
//拉近(推远)照片

          //这只是其中一种方法
          let newPosition  = SCNVector3Make(firstNode.node.worldPosition.x*2, firstNode.node.worldPosition.y*2, firstNode.node.worldPosition.z*2)
          let comeOut = SCNAction.move(to: newPosition, duration: 1.2)
          firstNode.node.runAction(comeOut)

自传/公转

            //自转
            let box = SCNBox(width: boxW, height: boxW, length: boxW, chamferRadius: 0)
            let boxNode = SCNNode(geometry: box)
            boxNode.position = vector3
            let emptyNode = SCNNode()
            emptyNode.position = SCNVector3Zero
            emptyNode.rotation = SCNVector4Make(0, 1, 0, Float.pi/Float(L/2) * Float(index))
            emptyNode.addChildNode(boxNode)
            photoRingNode.addChildNode(emptyNode)
            let ringAction = SCNAction.repeatForever(SCNAction.rotateBy(x: 0, y: right, z: 0, duration: 2))
            boxNode.runAction(ringAction)
            //公转 把节点加到一个正在自传的节点上就可以了

录屏

录屏是使用ReplayKit完成的
开始录屏

    协议      
    RPScreenRecorderDelegate,RPPreviewViewControllerDelegate

     RPScreenRecorder.shared().startRecording(handler: nil)
     RPScreenRecorder.shared().delegate = self

录制代理

func screenRecorder(_ screenRecorder: RPScreenRecorder, didStopRecordingWith previewViewController: RPPreviewViewController?, error: Error?) {
        print(error ?? "error")
        if error != nil{
            print("error:", error ?? "")
            DispatchQueue.main.async {
                let string = error?.localizedDescription
                ITTPromptView .showMessage(string, andFrameY: 0)
                print(string ?? "")
                //录制期间失败
                self.showFailReplay()
            }
        }else{
            print("else")
        }
        print("start recording handler")
    }
    //录制失败
    func showFailReplay(){
        let sb = UIStoryboard(name: "Main", bundle: nil)
        let vc = sb.instantiateViewController(withIdentifier: "HKExplainViewController")
        self.navigationController?.pushViewController(vc, animated: true)
        self.replayButtonRight.constant = 85;
        for button in self.smailButtons {
            button.alpha = 1
        }
        self.mainButton.alpha = 1
        UIView.animate(withDuration: 2.5) {
            self.stopReplayButton.alpha = 0
            self.view.layoutIfNeeded()
        }
    }

结束并弹出预览控制器

      RPScreenRecorder.shared().stopRecording { (vc, erroe) in
            vc?.previewControllerDelegate = self
            vc?.title = "We Are"
            self.present(vc!, animated: true, completion: nil)
        }

预览控制器的代理

    func previewController(_ previewController: RPPreviewViewController, didFinishWithActivityTypes activityTypes: Set<String>) {
        print(activityTypes)
        //取消
        if activityTypes.count == 0 {
            previewController.dismiss(animated: true, completion: nil)
        }
        //保存
        if activityTypes.contains("com.apple.UIKit.activity.SaveToCameraRoll"){
            ITTPromptView .showMessage("视频已保存在相册", andFrameY: 0)
            previewController.dismiss(animated: true, completion: nil)
            //检测到您刚刚保存了视频 是否想要分享
            let delay = DispatchTime.now() + .seconds(2)
            DispatchQueue.main.asyncAfter(deadline: delay) {
                self.outputVideo()
            }
        }
    }

目前所有代码已上传至 github https://github.com/SherlockQi/HeavenMemoirs
欢迎(跪求)Star!