SunXiaoShan

let noseOptions = ["👃", "🐽", "💧", " "]
let eyeOptions = ["👁", "🌕", "🌟", "🔥", "⚽️", "🔎", " "]
let mouthOptions = ["👄", "👅", "❤️", " "]
let hatOptions = ["🎓", "🎩", "🧢", "⛑", "👒", " "]
let features = ["nose", "leftEye", "rightEye", "mouth", "hat"]
let featureIndices = [[9], [1064], [42], [24, 25], [20]]

SunXiaoShan

func renderer(_ renderer: SCNSceneRenderer, didUpdate node: SCNNode, for anchor: ARAnchor) {
    guard let faceAnchor = anchor as? ARFaceAnchor, let faceGeometry = node.geometry as? ARSCNFaceGeometry else { return }

    // 更新，臉部表情變化時的位置
    faceGeometry.update(from: faceAnchor.geometry)
    updateFeatures(for: node, using: faceAnchor)
}

SunXiaoShan

public enum SCNFillMode : UInt {
    case fill
    case lines
}

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var originalSource: Any? = nil
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    if originalSource == nil {
        originalSource = sceneView.scene.background.contents
        sceneView.scene.background.contents = UIColor.black
    } else {
        sceneView.scene.background.contents = originalSource
        originalSource = nil
    }
}

SunXiaoShan

extension ViewController: ARSCNViewDelegate {
    
    func renderer(_ renderer: SCNSceneRenderer, nodeFor anchor: ARAnchor) -> SCNNode? {
        guard let faceAnchor = anchor as? ARFaceAnchor,
            let device = sceneView.device else { return nil }
        let faceGeometry = ARSCNFaceGeometry(device: device)
        let node = SCNNode(geometry: faceGeometry)
        node.geometry?.firstMaterial?.fillMode = .lines

        DispatchQueue.main.async {

SunXiaoShan

    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 判斷是否裝置支援 ar face 功能
        guard ARFaceTrackingConfiguration.isSupported else { fatalError() }
        sceneView.delegate = self
    }
    
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)

SunXiaoShan

@IBOutlet weak var sceneView: ARSCNView!

SunXiaoShan

- (void)sendMessage:(NSString *)context {
    if ([self.peripherals count] < 1 || context == nil) {
        return;
    }

    NSData *xmlData = [context dataUsingEncoding:NSUTF8StringEncoding];
    CBPeripheral *peripheral = [self.peripherals firstObject];
    [peripheral writeValue:xmlData forCharacteristic:self.cbCharacteristic type:CBCharacteristicWriteWithResponse];
}

SunXiaoShan

- (void)peripheral:(CBPeripheral *)peripheral
didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic
             error:(NSError *)error {
    if (error) {
        return;
    }

    if (characteristic.value == nil) {
        return;
    }

SunXiaoShan

- (void)centralManager:(CBCentralManager *)central
  didConnectPeripheral:(CBPeripheral *)peripheral {
    [self.centralManager stopScan];

    peripheral.delegate = self;
    [peripheral discoverServices:@[[CBUUID UUIDWithString:kServiceUUID]]];
}

- (void)centralManager:(CBCentralManager *)central
didFailToConnectPeripheral:(CBPeripheral *)peripheral