Overview
Show the merged observability metrics on top of the call UI so you can see live quality data during a session. Based on what you observe, you can add thresholds later (for example, show a poor-connection message when networkDegradationSource is .local).
Display Stats in the UI
Use a small ObservabilityStats model in your project to hold overlay fields (bandwidth, packet loss, degradation source, network condition labels).
1. Host Publisher and Subscriber Views
Reuse a UIViewRepresentable wrapper (as in the Basic video chat (Swift) tutorial) to embed OTPublisher and OTSubscriber views in SwiftUI:
2. Stats Overlay
Wire @Published var latestObservabilityStats on VonageVideoManager so SwiftUI refreshes when delegate callbacks update state on the main queue.
3. iOS App Lifecycle
iOS-specific: Unlike the Android SDK’s session.onPause() / onResume(), iOS apps typically rely on ScenePhase, audio session interruptions, and your own policy when backgrounding during a call. If the app backgrounds, stats may pause or stop until the session is active again—test on a physical device for realistic network behavior.
Next: Run with a second participant and confirm the overlay updates.
Client Observability
Learn how to use client observability to monitor real-time quality metrics for a video call with Vonage Video SDK.