Swift ARKit Guide: Augmented Reality Development

import ARKit
import RealityKit
import SwiftUI

struct ARViewContainer: UIViewRepresentable {
    func makeUIView(context: Context) -> ARView {
        let arView = ARView(frame: .zero)

        // Create AR session
        let config = ARWorldTrackingConfiguration()
        config.planeDetection = [.horizontal, .vertical]

        arView.session.run(config)

        return arView
    }

    func updateUIView(_ uiView: ARView, context: Context) {}
}

struct BasicARView: View {
    var body: some View {
        ARViewContainer()
            .edgesIgnoringSafeArea(.all)
    }
}

class PlaneDetectionManager: NSObject, ARSessionDelegate {
    private var arView: ARView?

    func setupPlaneDetection(in arView: ARView) {
        self.arView = arView

        let config = ARWorldTrackingConfiguration()
        config.planeDetection = [.horizontal, .vertical]

        arView.session.delegate = self
        arView.session.run(config)
    }

    func session(_ session: ARSession, didUpdate anchors: [ARAnchor]) {
        for anchor in anchors {
            if let planeAnchor = anchor as? ARPlaneAnchor {
                handlePlaneAnchor(planeAnchor)
            }
        }
    }

    private func handlePlaneAnchor(_ anchor: ARPlaneAnchor) {
        // Create visualization for detected plane
        let plane = ARPlaneAnchor(anchor)
        print("Plane detected: \(anchor.alignment)")
    }
}

extension ARView {
    func addPlaneVisualization(for anchor: ARPlaneAnchor) {
        // Create plane mesh
        let mesh = MeshResource(
            generatePlane(width: anchor.extent.x, depth: anchor.extent.z)
        )

        let material = SimpleMaterial(
            color: .blue.withAlphaComponent(0.5),
            isMetallic: false
        )

        let modelEntity = ModelEntity(mesh: mesh, materials: [material])

        let anchorEntity = AnchorEntity(anchor: anchor)
        anchorEntity.addChild(modelEntity)

        self.scene.addAnchor(anchorEntity)
    }
}

class ObjectPlacementManager {
    func placeObject(in arView: ARView, at location: CGPoint) {
        // Get raycast result
        let results = arView.raycast(from: location, allowing: .estimatedPlane, alignment: .horizontal)

        guard let result = results.first else {
            print("No plane detected")
            return
        }

        // Create 3D object
        let entity = create3DObject()

        // Place object
        let anchorEntity = AnchorEntity(world: result.worldTransform)
        anchorEntity.addChild(entity)

        arView.scene.addAnchor(anchorEntity)
    }

    private func create3DObject() -> Entity {
        // Create sphere
        let sphere = ModelEntity(
            mesh: MeshResource.generateSphere(radius: 0.1),
            materials: [SimpleMaterial(color: .red, isMetallic: false)]
        )

        // Add gesture interaction
        sphere.generateCollisionShapes(recursive: true)

        return sphere
    }
}

struct InteractiveARView: View {
    var body: some View {
        ARViewContainer()
            .gesture(
                TapGesture()
                    .onEnded { value in
                        handleTap(at: value.location)
                    }
            )
    }

    private func handleTap(at location: CGPoint) {
        // Handle tap to place object
        print("Tapped at: \(location)")
    }
}

extension Entity {
    func addDragGesture(to arView: ARView) {
        arView.installGestures([.translation], for: self)
    }
}

class ObjectInteractionManager {
    func setupInteractions(for entity: Entity, in arView: ARView) {
        // Enable gestures
        entity.generateCollisionShapes(recursive: true)
        arView.installGestures([.translation, .rotation], for: entity)
    }
}

class ImageTrackingManager {
    func setupImageTracking(in arView: ARView, referenceImages: Set<ARReferenceImage>) {
        let config = ARImageTrackingConfiguration()
        config.trackingImages = referenceImages
        config.maximumNumberOfTrackedImages = 1

        arView.session.run(config)
    }

    func loadReferenceImages() -> Set<ARReferenceImage> {
        var images = Set<ARReferenceImage>()

        // Load images from assets
        if let image = UIImage(named: "referenceImage"),
           let cgImage = image.cgImage {

            let referenceImage = ARReferenceImage(
                cgImage: cgImage,
                orientation: .up,
                physicalWidth: 0.1
            )

            referenceImage.name = "Reference"
            images.insert(referenceImage)
        }

        return images
    }
}

import ARKit

class FaceTrackingManager {
    func setupFaceTracking(in arView: ARView) {
        guard ARFaceTrackingConfiguration.isSupported else {
            print("Face tracking not supported")
            return
        }

        let config = ARFaceTrackingConfiguration()
        config.isLightingEstimationEnabled = true

        arView.session.run(config)
    }

    func createFaceEntity() -> Entity {
        // Create face mask
        let faceMask = ModelEntity(
            mesh: .generateSphere(radius: 0.1),
            materials: [SimpleMaterial(color: .white.withAlphaComponent(0.5), isMetallic: false)]
        )

        return faceMask
    }
}

class LightEstimationManager {
    func setupLighting(in arView: ARView) {
        let config = ARWorldTrackingConfiguration()
        config.environmentTexturing = .automatic
        config.frameSemantics = .sceneDepth

        arView.environment.lighting.intensity = 1000
        arView.environment.lighting.usesImageBasedLighting = true

        arView.session.run(config)
    }
}

struct SwiftUIARView: View {
    @State private var showAR = false

    var body: some View {
        VStack {
            if showAR {
                ARViewContainer()
                    .edgesIgnoringSafeArea(.all)
            } else {
                Button("Start AR Experience") {
                    showAR = true
                }
                .padding()
                .background(Color.blue)
                .foregroundColor(.white)
                .cornerRadius(10)
            }
        }
    }
}