Contoh & Kasus Penggunaan

Panduan ini menyajikan contoh praktis untuk pola aplikasi watch yang umum menggunakan @capgo/capacitor-watch. TypeScript di sisi phone berfungsi untuk kedua iOS dan Android; lihat sampel UI di bawah menggunakan SwiftUI (Apple Watch). Gunakan payload yang sama di Wear OS dengan jalur Data Layer dari panduan setup Wear OS.

Contoh 1: Pelacak Kesehatan & Kebugaran

Sinkronisasi data workout antara watch dan phone.

Watch (SwiftUI)

import SwiftUI
import CapgoWatchSDK

struct WorkoutView: View {
    @ObservedObject var connector = WatchConnector.shared
    @State private var heartRate: Double = 0
    @State private var calories: Double = 0
    @State private var isTracking = false

    var body: some View {
        VStack(spacing: 12) {
            // Heart Rate Display
            HStack {
                Image(systemName: "heart.fill")
                    .foregroundColor(.red)
                Text("\(Int(heartRate)) BPM")
                    .font(.title2)
            }

            // Calories
            HStack {
                Image(systemName: "flame.fill")
                    .foregroundColor(.orange)
                Text("\(Int(calories)) cal")
            }

            // Start/Stop Button
            Button(isTracking ? "Stop" : "Start") {
                toggleTracking()
            }
            .buttonStyle(.borderedProminent)
            .tint(isTracking ? .red : .green)
        }
        .onReceive(Timer.publish(every: 1, on: .main, in: .common).autoconnect()) { _ in
            if isTracking {
                updateMetrics()
            }
        }
    }

    private func toggleTracking() {
        isTracking.toggle()
        if isTracking {
            // Notify phone that workout started
            connector.sendMessage([
                "event": "workoutStarted",
                "timestamp": Date().timeIntervalSince1970
            ])
        } else {
            // Send final summary to phone
            do {
                try connector.updateApplicationContext([
                    "workoutComplete": true,
                    "totalCalories": calories,
                    "avgHeartRate": heartRate,
                    "endTime": Date().timeIntervalSince1970
                ])
            } catch {
                print("Failed to update context: \(error)")
            }
        }
    }

    private func updateMetrics() {
        // Simulate heart rate (in real app, use HealthKit)
        heartRate = Double.random(in: 120...160)
        calories += Double.random(in: 0.1...0.3)

        // Send real-time updates if phone is reachable
        if connector.isReachable {
            connector.sendMessage([
                "heartRate": heartRate,
                "calories": calories,
                "timestamp": Date().timeIntervalSince1970
            ])
        }
    }
}

Ponsel (Capacitor)

import { CapgoWatch } from '@capgo/capacitor-watch';

class WorkoutTracker {
  private heartRateData: number[] = [];
  private totalCalories = 0;

  async initialize() {
    // Listen for real-time workout updates
    await CapgoWatch.addListener('messageReceived', (event) => {
      const { heartRate, calories, timestamp } = event.message;

      if (heartRate) {
        this.heartRateData.push(heartRate);
        this.updateUI(heartRate, calories);
      }

      if (event.message.event === 'workoutStarted') {
        this.onWorkoutStarted(timestamp);
      }
    });

    // Listen for workout completion via context
    await CapgoWatch.addListener('applicationContextReceived', (event) => {
      if (event.context.workoutComplete) {
        this.onWorkoutComplete(event.context);
      }
    });
  }

  private onWorkoutStarted(timestamp: number) {
    console.log('Workout started at:', new Date(timestamp * 1000));
    this.heartRateData = [];
    this.totalCalories = 0;
  }

  private onWorkoutComplete(data: any) {
    const avgHeartRate = data.avgHeartRate;
    const totalCalories = data.totalCalories;

    // Save to your backend
    this.saveWorkout({
      avgHeartRate,
      totalCalories,
      endTime: data.endTime,
      heartRateHistory: this.heartRateData
    });
  }

  private updateUI(heartRate: number, calories: number) {
    // Update your app's UI
    document.getElementById('heart-rate')!.textContent = `${Math.round(heartRate)} BPM`;
    document.getElementById('calories')!.textContent = `${Math.round(calories)} cal`;
  }

  private async saveWorkout(data: any) {
    // Save to your backend
    console.log('Saving workout:', data);
  }
}

const tracker = new WorkoutTracker();
tracker.initialize();

Contoh 2: Remote Smart Home

Kontrol perangkat smart home dari watch Anda.

Watch (SwiftUI)

import SwiftUI
import CapgoWatchSDK

struct SmartHomeView: View {
    @ObservedObject var connector = WatchConnector.shared
    @State private var devices: [SmartDevice] = []
    @State private var isLoading = false

    var body: some View {
        NavigationView {
            Group {
                if isLoading {
                    ProgressView("Loading...")
                } else if devices.isEmpty {
                    Text("No devices")
                        .foregroundColor(.secondary)
                } else {
                    List(devices) { device in
                        DeviceRow(device: device, onToggle: { toggleDevice(device) })
                    }
                }
            }
            .navigationTitle("Home")
            .toolbar {
                Button(action: refreshDevices) {
                    Image(systemName: "arrow.clockwise")
                }
            }
        }
        .onAppear {
            refreshDevices()
        }
        .onChange(of: connector.lastMessage) { message in
            handleMessage(message)
        }
    }

    private func refreshDevices() {
        guard connector.isReachable else {
            // Load from cached context
            loadFromContext()
            return
        }

        isLoading = true
        connector.sendMessage(["action": "getDevices"]) { reply in
            DispatchQueue.main.async {
                isLoading = false
                if let deviceList = reply["devices"] as? [[String: Any]] {
                    devices = deviceList.compactMap { SmartDevice(from: $0) }
                }
            }
        }
    }

    private func toggleDevice(_ device: SmartDevice) {
        connector.sendMessage([
            "action": "toggleDevice",
            "deviceId": device.id,
            "newState": !device.isOn
        ]) { reply in
            DispatchQueue.main.async {
                if reply["success"] as? Bool == true {
                    // Update local state
                    if let index = devices.firstIndex(where: { $0.id == device.id }) {
                        devices[index].isOn.toggle()
                    }
                }
            }
        }
    }

    private func loadFromContext() {
        if let deviceList = connector.applicationContext["devices"] as? [[String: Any]] {
            devices = deviceList.compactMap { SmartDevice(from: $0) }
        }
    }

    private func handleMessage(_ message: [String: Any]) {
        // Handle push updates from phone
        if let update = message["deviceUpdate"] as? [String: Any],
           let deviceId = update["id"] as? String,
           let isOn = update["isOn"] as? Bool {
            if let index = devices.firstIndex(where: { $0.id == deviceId }) {
                devices[index].isOn = isOn
            }
        }
    }
}

struct SmartDevice: Identifiable {
    let id: String
    let name: String
    let type: String
    var isOn: Bool

    init?(from dict: [String: Any]) {
        guard let id = dict["id"] as? String,
              let name = dict["name"] as? String,
              let type = dict["type"] as? String,
              let isOn = dict["isOn"] as? Bool else {
            return nil
        }
        self.id = id
        self.name = name
        self.type = type
        self.isOn = isOn
    }
}

struct DeviceRow: View {
    let device: SmartDevice
    let onToggle: () -> Void

    var body: some View {
        HStack {
            Image(systemName: iconName)
                .foregroundColor(device.isOn ? .yellow : .gray)
            Text(device.name)
            Spacer()
            Toggle("", isOn: .constant(device.isOn))
                .labelsHidden()
                .onTapGesture { onToggle() }
        }
    }

    var iconName: String {
        switch device.type {
        case "light": return device.isOn ? "lightbulb.fill" : "lightbulb"
        case "thermostat": return "thermometer"
        case "lock": return device.isOn ? "lock.fill" : "lock.open"
        default: return "power"
        }
    }
}

Ponsel (Capacitor)

import { CapgoWatch } from '@capgo/capacitor-watch';

interface SmartDevice {
  id: string;
  name: string;
  type: string;
  isOn: boolean;
}

class SmartHomeController {
  private devices: SmartDevice[] = [];

  async initialize() {
    // Handle requests from watch
    await CapgoWatch.addListener('messageReceivedWithReply', async (event) => {
      const { action, deviceId, newState } = event.message;

      let response: any = { success: false };

      switch (action) {
        case 'getDevices':
          response = { devices: this.devices };
          break;

        case 'toggleDevice':
          const success = await this.toggleDevice(deviceId, newState);
          response = { success };
          break;
      }

      await CapgoWatch.replyToMessage({
        callbackId: event.callbackId,
        data: response
      });
    });

    // Load initial devices
    await this.loadDevices();

    // Keep watch updated with device states
    await this.syncDevicesToWatch();
  }

  private async loadDevices() {
    // Load from your smart home API
    this.devices = [
      { id: '1', name: 'Living Room', type: 'light', isOn: true },
      { id: '2', name: 'Bedroom', type: 'light', isOn: false },
      { id: '3', name: 'Thermostat', type: 'thermostat', isOn: true },
      { id: '4', name: 'Front Door', type: 'lock', isOn: true }
    ];
  }

  private async toggleDevice(deviceId: string, newState: boolean): Promise<boolean> {
    try {
      // Call your smart home API
      const device = this.devices.find(d => d.id === deviceId);
      if (device) {
        device.isOn = newState;

        // Push update to watch
        const info = await CapgoWatch.getInfo();
        if (info.isReachable) {
          await CapgoWatch.sendMessage({
            data: {
              deviceUpdate: { id: deviceId, isOn: newState }
            }
          });
        }
        return true;
      }
      return false;
    } catch (error) {
      console.error('Failed to toggle device:', error);
      return false;
    }
  }

  private async syncDevicesToWatch() {
    // Update application context for offline access
    await CapgoWatch.updateApplicationContext({
      context: { devices: this.devices }
    });
  }

  // Call this when devices change on the phone
  async onDeviceStateChanged(deviceId: string, isOn: boolean) {
    const device = this.devices.find(d => d.id === deviceId);
    if (device) {
      device.isOn = isOn;
      await this.syncDevicesToWatch();
    }
  }
}

const controller = new SmartHomeController();
controller.initialize();

Contoh 3: Notification Center

Kirim notifikasi kustom ke watch.

Ponsel (Capacitor)

import { CapgoWatch } from '@capgo/capacitor-watch';

class NotificationService {
  async sendNotification(title: string, body: string, data?: any) {
    const info = await CapgoWatch.getInfo();

    if (info.isReachable) {
      // Send immediately if watch is reachable
      await CapgoWatch.sendMessage({
        data: {
          type: 'notification',
          title,
          body,
          data,
          timestamp: Date.now()
        }
      });
    } else {
      // Queue for later delivery
      await CapgoWatch.transferUserInfo({
        userInfo: {
          type: 'notification',
          title,
          body,
          data,
          timestamp: Date.now()
        }
      });
    }
  }

  async sendUrgentAlert(message: string) {
    // Use sendMessage for urgent alerts (requires watch to be reachable)
    const info = await CapgoWatch.getInfo();

    if (!info.isReachable) {
      console.warn('Watch not reachable for urgent alert');
      return false;
    }

    await CapgoWatch.sendMessage({
      data: {
        type: 'urgentAlert',
        message,
        haptic: 'warning',
        timestamp: Date.now()
      }
    });

    return true;
  }
}

// Usage
const notifications = new NotificationService();

// Regular notification (queued if watch unavailable)
await notifications.sendNotification(
  'Order Update',
  'Your order has shipped!',
  { orderId: '12345' }
);

// Urgent alert (requires watch to be active)
const sent = await notifications.sendUrgentAlert('Security alert: New login detected');

Watch (SwiftUI)

import SwiftUI
import WatchKit
import CapgoWatchSDK

struct NotificationView: View {
    @ObservedObject var connector = WatchConnector.shared
    @State private var notifications: [WatchNotification] = []
    @State private var showAlert = false
    @State private var alertMessage = ""

    var body: some View {
        NavigationView {
            List(notifications) { notification in
                NotificationRow(notification: notification)
            }
            .navigationTitle("Notifications")
        }
        .onReceive(connector.$lastMessage) { message in
            handleMessage(message)
        }
        .alert("Alert", isPresented: $showAlert) {
            Button("OK") { }
        } message: {
            Text(alertMessage)
        }
    }

    private func handleMessage(_ message: [String: Any]) {
        guard let type = message["type"] as? String else { return }

        switch type {
        case "notification":
            let notification = WatchNotification(
                id: UUID().uuidString,
                title: message["title"] as? String ?? "",
                body: message["body"] as? String ?? "",
                timestamp: Date(timeIntervalSince1970: (message["timestamp"] as? Double ?? 0) / 1000)
            )
            notifications.insert(notification, at: 0)

            // Play haptic
            WKInterfaceDevice.current().play(.notification)

        case "urgentAlert":
            alertMessage = message["message"] as? String ?? "Alert"
            showAlert = true

            // Play strong haptic for urgent alerts
            if let hapticType = message["haptic"] as? String {
                switch hapticType {
                case "warning":
                    WKInterfaceDevice.current().play(.notification)
                    DispatchQueue.main.asyncAfter(deadline: .now() + 0.3) {
                        WKInterfaceDevice.current().play(.notification)
                    }
                default:
                    WKInterfaceDevice.current().play(.notification)
                }
            }

        default:
            break
        }
    }
}

struct WatchNotification: Identifiable {
    let id: String
    let title: String
    let body: String
    let timestamp: Date
}

struct NotificationRow: View {
    let notification: WatchNotification

    var body: some View {
        VStack(alignment: .leading, spacing: 4) {
            Text(notification.title)
                .font(.headline)
            Text(notification.body)
                .font(.caption)
                .foregroundColor(.secondary)
            Text(notification.timestamp, style: .relative)
                .font(.caption2)
                .foregroundColor(.secondary)
        }
        .padding(.vertical, 4)
    }
}

Contoh 4: Data Sync Service

Sinkronkan data antara ponsel dan watch.

import { CapgoWatch } from '@capgo/capacitor-watch';

class DataSyncService {
  private syncQueue: any[] = [];
  private isSyncing = false;

  async initialize() {
    // Listen for sync requests from watch
    await CapgoWatch.addListener('messageReceivedWithReply', async (event) => {
      if (event.message.action === 'sync') {
        const data = await this.getDataForSync(event.message.lastSyncTime);
        await CapgoWatch.replyToMessage({
          callbackId: event.callbackId,
          data: { items: data, syncTime: Date.now() }
        });
      }
    });

    // Listen for data from watch
    await CapgoWatch.addListener('userInfoReceived', (event) => {
      this.handleWatchData(event.userInfo);
    });

    // Monitor connectivity for sync opportunities
    await CapgoWatch.addListener('reachabilityChanged', (event) => {
      if (event.isReachable && this.syncQueue.length > 0) {
        this.processSyncQueue();
      }
    });
  }

  // Push important data to watch (guaranteed delivery)
  async pushToWatch(data: any) {
    await CapgoWatch.transferUserInfo({
      userInfo: {
        type: 'dataUpdate',
        data,
        timestamp: Date.now()
      }
    });
  }

  // Update shared state (latest value only)
  async updateSharedState(state: any) {
    await CapgoWatch.updateApplicationContext({
      context: {
        ...state,
        lastUpdated: Date.now()
      }
    });
  }

  // Queue data for sync when watch becomes available
  queueForSync(data: any) {
    this.syncQueue.push(data);
    this.attemptSync();
  }

  private async attemptSync() {
    const info = await CapgoWatch.getInfo();
    if (info.isReachable) {
      await this.processSyncQueue();
    }
  }

  private async processSyncQueue() {
    if (this.isSyncing || this.syncQueue.length === 0) return;

    this.isSyncing = true;

    while (this.syncQueue.length > 0) {
      const item = this.syncQueue.shift();
      await CapgoWatch.transferUserInfo({ userInfo: item });
    }

    this.isSyncing = false;
  }

  private async getDataForSync(lastSyncTime: number): Promise<any[]> {
    // Return data modified since lastSyncTime
    // This would query your database/API
    return [];
  }

  private handleWatchData(data: any) {
    console.log('Received from watch:', data);
    // Process and save data from watch
  }
}

Praktik Terbaik

1. Pilih Metode Transfer yang Tepat

Metode	Kasus Penggunaan	Pengiriman
sendMessage	Interaktif, sensitif waktu	Instan (gagal jika tidak terhubung)
updateApplicationContext	Status aplikasi saat ini	Hanya nilai terbaru
transferUserInfo	Data penting	Antrean, terjamin

2. Tangani Offline dengan Baik

async function smartSend(data: any, important: boolean) {
  const info = await CapgoWatch.getInfo();

  if (info.isReachable) {
    // Send immediately
    await CapgoWatch.sendMessage({ data });
  } else if (important) {
    // Queue for later
    await CapgoWatch.transferUserInfo({ userInfo: data });
  } else {
    // Update context (will be available when watch opens app)
    await CapgoWatch.updateApplicationContext({ context: data });
  }
}

3. Minimalkan Ukuran Data

// Bad - sending large objects
connector.sendMessage(["user": fullUserObject])

// Good - send only what's needed
connector.sendMessage([
    "userId": user.id,
    "name": user.displayName,
    "avatarUrl": user.avatarUrl
])

4. Gunakan Haptics dengan Tepat

import WatchKit

// Success feedback
WKInterfaceDevice.current().play(.success)

// Failure feedback
WKInterfaceDevice.current().play(.failure)

// Navigation feedback
WKInterfaceDevice.current().play(.click)

// Notification
WKInterfaceDevice.current().play(.notification)

5. Cache pada Watch

class DataCache {
    private let defaults = UserDefaults.standard

    func save(_ data: [String: Any], forKey key: String) {
        if let encoded = try? JSONSerialization.data(withJSONObject: data) {
            defaults.set(encoded, forKey: key)
        }
    }

    func load(forKey key: String) -> [String: Any]? {
        guard let data = defaults.data(forKey: key),
              let dict = try? JSONSerialization.jsonObject(with: data) as? [String: Any] else {
            return nil
        }
        return dict
    }
}

Langkah Berikutnya

• Membuat aplikasi watchOS - Setup Apple Watch
• Membuat aplikasi Wear OS - Setup modul Wear OS
• Referensi API - Dokumentasi lengkap API
• Repositori GitHub - Source code dan issue

Lanjut ke Examples & Use Cases

Jika Anda menggunakan Contoh & Kasus Penggunaan untuk merencanakan pekerjaan plugin native, hubungkan dengan Menggunakan @capgo/capacitor-watch untuk fitur native di Menggunakan @capgo/capacitor-watch, Direktori Plugin Capgo untuk alur kerja produk di Direktori Plugin Capgo, Plugin Capacitor oleh Capgo untuk detail implementasi pada Capacitor Plugins oleh Capgo Menambahkan atau Memperbarui Plugin untuk detail implementasi di Menambahkan atau Memperbarui Plugin, dan Alternatif Plugin Ionic Enterprise untuk alur kerja produk dalam Alternatif Plugin Ionic Enterprise.