근처 기기와의 연결 + 기기간 비디오/사진 데이터 송수신 기능을 구현합니다.

mirroringBooth/mirroringBooth.xcodeproj/project.pbxproj

@@ -10,9 +10,22 @@
 		8C796EAA2EF52FB200280FED /* mirroringBooth.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = mirroringBooth.app; sourceTree = BUILT_PRODUCTS_DIR; };
 /* End PBXFileReference section */
 
+/* Begin PBXFileSystemSynchronizedBuildFileExceptionSet section */
+		8CC632842EFB1909006EA0E1 /* Exceptions for "mirroringBooth" folder in "mirroringBooth" target */ = {
+			isa = PBXFileSystemSynchronizedBuildFileExceptionSet;
+			membershipExceptions = (
+				Info.plist,
+			);
+			target = 8C796EA92EF52FB200280FED /* mirroringBooth */;
+		};
+/* End PBXFileSystemSynchronizedBuildFileExceptionSet section */
+
 /* Begin PBXFileSystemSynchronizedRootGroup section */
 		8C796EAC2EF52FB200280FED /* mirroringBooth */ = {
 			isa = PBXFileSystemSynchronizedRootGroup;
+			exceptions = (
+				8CC632842EFB1909006EA0E1 /* Exceptions for "mirroringBooth" folder in "mirroringBooth" target */,
+			);
 			path = mirroringBooth;
 			sourceTree = "<group>";
 		};
@@ -254,7 +267,9 @@
 				ENABLE_PREVIEWS = YES;
 				ENABLE_USER_SELECTED_FILES = readonly;
 				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_FILE = mirroringBooth/Info.plist;
 				INFOPLIST_KEY_CFBundleDisplayName = "Mirroring Booth";
+				INFOPLIST_KEY_NSLocalNetworkUsageDescription = "이 앱은 같은 네트워크의 기기와 연결하기 위해 로컬 네트워크 접근이 필요합니다.";
 				"INFOPLIST_KEY_UIApplicationSceneManifest_Generation[sdk=iphoneos*]" = YES;
 				"INFOPLIST_KEY_UIApplicationSceneManifest_Generation[sdk=iphonesimulator*]" = YES;
 				"INFOPLIST_KEY_UIApplicationSupportsIndirectInputEvents[sdk=iphoneos*]" = YES;
@@ -302,7 +317,9 @@
 				ENABLE_PREVIEWS = YES;
 				ENABLE_USER_SELECTED_FILES = readonly;
 				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_FILE = mirroringBooth/Info.plist;
 				INFOPLIST_KEY_CFBundleDisplayName = "Mirroring Booth";
+				INFOPLIST_KEY_NSLocalNetworkUsageDescription = "이 앱은 같은 네트워크의 기기와 연결하기 위해 로컬 네트워크 접근이 필요합니다.";
 				"INFOPLIST_KEY_UIApplicationSceneManifest_Generation[sdk=iphoneos*]" = YES;
 				"INFOPLIST_KEY_UIApplicationSceneManifest_Generation[sdk=iphonesimulator*]" = YES;
 				"INFOPLIST_KEY_UIApplicationSupportsIndirectInputEvents[sdk=iphoneos*]" = YES;

mirroringBooth/mirroringBooth/CameraDevice/Connection/BrowserView.swift

@@ -0,0 +1,79 @@
+//
+//  BrowserView.swift
+//  mirroringBooth
+//
+//  Created by 이상유 on 2025-12-24.
+//
+
+import SwiftUI
+
+struct BrowserView: View {
+
+    private var router: Router
+    private var sender: StreamSender
+    @State private var isConnecting = false
+
+    init(_ router: Router, _ sender: StreamSender) {
+        self.router = router
+        self.sender = sender
+    }
+
+    var body: some View {
+        VStack {
+            Button {
+                router.pop()
+            } label: {
+                Text("뒤로가기")
+                    .font(.headline)
+                    .padding(5)
+            }
+
+            if isConnecting {
+                ProgressView()
+                    .padding()
+                Text("연결 중...")
+                    .font(.subheadline)
+            }
+
+            Text(sender.connectionState.values.joined(separator: "\n"))
+                .font(.subheadline)
+
+            ForEach(sender.peers, id: \.self) { peer in
+                deviceRow(peer)
+            }
+        }
+        .onAppear {
+            sender.startBrowsing()
+        }
+        .onDisappear {
+            sender.stopBrowsing()
+        }
+        .onChange(of: sender.connectionState) { _, newValue in
+            // 연결이 완료되면 카메라 화면으로 이동
+            if newValue.values.contains(where: { $0.contains("연결 완료") }) && isConnecting {
+                isConnecting = false
+                router.push(to: .camera)
+            }
+        }
+    }
+
+    @ViewBuilder
+    func deviceRow(_ peer: String) -> some View {
+        Button {
+            sender.invite(to: peer)
+            isConnecting = true
+        } label: {
+            Text(peer)
+                .padding(5)
+                .overlay {
+                    RoundedRectangle(cornerRadius: 12)
+                        .stroke(style: StrokeStyle(lineWidth: 1))
+                }
+        }
+        .disabled(isConnecting)
+    }
+}
+
+#Preview {
+    BrowserView(Router(), StreamSender())
+}

mirroringBooth/mirroringBooth/CameraDevice/Connection/StreamSender.swift

@@ -0,0 +1,153 @@
+//
+//  StreamSender.swift
+//  mirroringBooth
+//
+//  Created by 이상유 on 2025-12-28.
+//
+
+import Foundation
+import MultipeerConnectivity
+
+/// 스트림 송신 측 (iPhone)
+/// 다른 기기를 탐색하고 연결하여 스트림 데이터(비디오/사진)를 전송
+@Observable
+final class StreamSender: NSObject {
+
+    /// 연결된 피어들의 상태 정보
+    var connectionState: [String: String] = [:]
+    /// 발견된 피어 목록
+    var peers: [String] = []
+
+    /// 촬영 요청 수신 콜백
+    var onCaptureRequest: (() -> Void)?
+
+    private let serviceType: String
+    /// 현재 기기의 식별자
+    private let identifier: MCPeerID
+    /// Multipeer 연결 세션
+    private let session: MCSession
+    /// 서비스 탐색 (송신 측)
+    private let browser: MCNearbyServiceBrowser
+    /// 발견된 피어 ID 매핑
+    private var discoveredPeers: [String: MCPeerID] = [:]
+
+    init(serviceType: String = "mirroringbooth") {
+        self.serviceType = serviceType
+        self.identifier = MCPeerID(displayName: UIDevice.current.name)
+        self.session = MCSession(
+            peer: identifier,
+            securityIdentity: nil,
+            encryptionPreference: .none
+        )
+        self.browser = MCNearbyServiceBrowser(peer: identifier, serviceType: serviceType)
+
+        super.init()
+        setup()
+    }
+
+    private func setup() {
+        session.delegate = self
+        browser.delegate = self
+    }
+
+    func startBrowsing() {
+        peers.removeAll()
+        discoveredPeers.removeAll()
+        browser.startBrowsingForPeers()
+    }
+
+    func stopBrowsing() {
+        browser.stopBrowsingForPeers()
+    }
+
+    func invite(to id: String) {
+        guard let peerID = discoveredPeers[id] else { return }
+        browser.invitePeer(peerID, to: session, withContext: nil, timeout: 30)
+    }
+
+    func sendPacket(_ data: Data) {
+        // 연결된 피어가 없으면 전송하지 않음
+        guard !session.connectedPeers.isEmpty else {
+            return
+        }
+
+        // 패킷 타입에 따라 전송 모드 결정
+        // SPS/PPS와 Photo는 반드시 전달되어야 하므로 reliable 모드 사용
+        // 프레임 데이터는 실시간성이 중요하므로 unreliable 모드 사용
+        let sendMode: MCSessionSendDataMode = {
+            guard data.count > 0 else { return .unreliable }
+
+            let packetType = data[0]
+            // SPS(0x01), PPS(0x02), Photo(0x05)인 경우 reliable 모드
+            if packetType == 0x01 || packetType == 0x02 || packetType == 0x05 {
+                return .reliable
+            }
+            return .unreliable
+        }()
+
+        do {
+            try session.send(data, toPeers: session.connectedPeers, with: sendMode)
+        } catch {
+            print("Failed to send packet data: \(error)")
+        }
+    }
+
+}
+
+// MARK: - Session Delegate
+extension StreamSender: MCSessionDelegate {
+
+    func session(_ session: MCSession, peer peerID: MCPeerID, didChange state: MCSessionState) {
+        switch state {
+        case .connected:
+            connectionState[peerID.displayName] = "✅ \(peerID.displayName)와 연결 완료"
+        case .connecting:
+            connectionState[peerID.displayName] = "⏳ \(peerID.displayName)와 연결 중"
+        case .notConnected:
+            connectionState.removeValue(forKey: peerID.displayName)
+        default:
+            break
+        }
+    }
+
+    func session(_ session: MCSession, didReceive data: Data, fromPeer peerID: MCPeerID) {
+        // 수신된 데이터가 촬영 요청 패킷인지 확인
+        guard let packet = MediaPacket.deserialize(data),
+              packet.type == .captureRequest else {
+            return
+        }
+
+        // 촬영 요청 콜백 호출
+        onCaptureRequest?()
+    }
+
+    func session(_ session: MCSession, didReceive stream: InputStream, withName streamName: String, fromPeer peerID: MCPeerID) { }
+
+    func session(_ session: MCSession, didStartReceivingResourceWithName resourceName: String, fromPeer peerID: MCPeerID, with progress: Progress) { }
+
+    func session(_ session: MCSession, didFinishReceivingResourceWithName resourceName: String, fromPeer peerID: MCPeerID, at localURL: URL?, withError error: (any Error)?) { }
+
+}
+
+// MARK: - Browser Delegate
+extension StreamSender: MCNearbyServiceBrowserDelegate {
+
+    func browser(
+        _ browser: MCNearbyServiceBrowser,
+        foundPeer peerID: MCPeerID,
+        withDiscoveryInfo info: [String : String]?
+    ) {
+        let displayName = peerID.displayName
+        discoveredPeers[displayName] = peerID
+        guard !peers.contains(displayName) else { return }
+        peers.append(displayName)
+    }
+
+    func browser(
+        _ browser: MCNearbyServiceBrowser,
+        lostPeer peerID: MCPeerID
+    ) {
+
+    }
+
+}

mirroringBooth/mirroringBooth/CameraDevice/Home/HomeView.swift

@@ -0,0 +1,39 @@
+//
+//  HomeView.swift
+//  mirroringBooth
+//
+//  Created by 이상유 on 2025-12-24.
+//
+
+import SwiftUI
+
+struct HomeView: View {
+
+    @State private var router: Router = .init()
+    private let sender = StreamSender()
+
+    var body: some View {
+        NavigationStack(path: $router.path) {
+            Button {
+                router.push(to: .connection)
+            } label: {
+                Text("촬영하기")
+                    .font(.headline)
+                    .padding(5)
+            }
+            .navigationDestination(for: Route.self) { viewType in
+                switch viewType {
+                case .connection:
+                    BrowserView(router, sender)
+                case .camera:
+                    StreamingView(sender)
+                }
+            }
+        }
+    }
+
+}
+
+#Preview {
+    HomeView()
+}