How to Implement Interactive Live Streaming in iOS Apps: A Swift/Objective-C SDK Guide

1struct JoinStreamView: View {
2    @State var streamId: String = ""
3    @State var name: String = ""
4
5    var body: some View {
6        NavigationView {
7            ZStack {
8                // Background styling
9                
10                VStack {
11                    // App title headers
12                    
13                    // Create Stream Button
14                    NavigationLink(
15                        destination: LiveStreamView(
16                            userName: name.isEmpty ? "Guest" : name, 
17                            mode: .SEND_AND_RECV
18                        )
19                    ) {
20                        ActionButton(title: "Create Live Stream", icon: "plus.circle.fill")
21                    }
22                    
23                    // Stream ID input field
24                    
25                    // Join options
26                    HStack {
27                        // Join as Host button (SEND_AND_RECV mode)
28                        // Join as Audience button (RECV_ONLY mode)
29                    }
30                }
31            }
32        }
33    }
34}
35

1class LiveStreamViewController: ObservableObject {
2    var token = "YOUR_TOKEN"
3    @Published var meeting: Meeting? = nil
4    @Published var participants: [Participant] = []
5    @Published var streamID: String = ""
6
7    // Initialize a stream with specific mode (host or audience)
8    func initializeStream(streamId: String, userName: String, mode: Mode) {
9        // Initialize the meeting with VideoSDK
10        meeting = VideoSDK.initMeeting(
11            meetingId: streamId,
12            participantName: userName,
13            micEnabled: true,
14            webcamEnabled: true,
15            mode: mode
16        )
17        
18        // Join the stream and add event listeners
19        meeting?.join()
20        meeting?.addEventListener(self)
21    }
22    
23    // Create a new stream
24    func joinRoom(userName: String, mode: Mode) {
25        // API call to create new room
26    }
27    
28    // Join existing stream
29    func joinStream(streamId: String, userName: String, mode: Mode) {
30        // Join with provided stream ID
31    }
32}
33
34// Event listeners for meeting events
35extension LiveStreamViewController: MeetingEventListener {
36    func onMeetingJoined() {
37        // Handle local participant joining
38    }
39    
40    func onParticipantJoined(_ participant: Participant) {
41        // Add new participant to the list
42    }
43    
44    // Other event handling methods
45}
46
47// Event listeners for participant events
48extension LiveStreamViewController: ParticipantEventListener {
49    func onStreamEnabled(_ stream: MediaStream, forParticipant participant: Participant) {
50        // Handle media stream being enabled
51    }
52    
53    func onStreamDisabled(_ stream: MediaStream, forParticipant participant: Participant) {
54        // Handle media stream being disabled
55    }
56}
57

1struct LiveStreamView: View {
2    @ObservedObject var liveStreamViewController = LiveStreamViewController()
3    @State private var currentMode: Mode
4    @State var isUnMute: Bool = true
5    @State var camEnabled: Bool = true
6
7    // Check if the user is in audience mode
8    private var isAudienceMode: Bool {
9        // Logic to determine if user is in audience mode
10    }
11
12    var body: some View {
13        VStack {
14            if liveStreamViewController.participants.isEmpty {
15                Text("Stream Initializing")
16            } else {
17                VStack {
18                    // Stream ID information
19                    
20                    // Participant videos
21                    List {
22                        // Display participants who are broadcasting
23                    }
24                    
25                    // Media controls for hosts
26                    if !isAudienceMode {
27                        HStack {
28                            // Mic toggle button
29                            // Camera toggle button
30                        }
31                    }
32                    
33                    // General controls
34                    HStack {
35                        // Leave stream button
36                        
37                        // Mode switching button
38                        Button {
39                            let newMode: Mode = isAudienceMode ? .SEND_AND_RECV : .RECV_ONLY
40                            liveStreamViewController.meeting?.changeMode(newMode)
41                            currentMode = newMode
42                        } label: {
43                            Text(isAudienceMode ? "Switch to Host" : "Switch to Audience")
44                        }
45                    }
46                }
47            }
48        }
49        .onAppear {
50            // Initialize VideoSDK and join stream
51        }
52    }
53}
54

1import ActivityKit
2import WidgetKit
3
4// Define the Live Activity attributes
5struct StreamActivityAttributes: ActivityAttributes {
6    public struct ContentState: Codable, Hashable {
7        var viewerCount: Int
8        var isLive: Bool
9        var elapsedTime: TimeInterval
10        var recentMessage: String?
11    }
12    
13    var streamTitle: String
14    var channelName: String
15    var broadcasterName: String
16}
17
18// Add Live Activity methods to your controller
19extension LiveStreamViewController {
20    // Start Live Activity
21    func startLiveActivity() {
22        // Initialize activity with streaming metadata
23    }
24    
25    // Update Live Activity with new information
26    func updateLiveActivity(viewerCount: Int, recentMessage: String? = nil) {
27        // Update the activity with new data
28    }
29    
30    // End Live Activity when stream ends
31    func endLiveActivity() {
32        // Finalize the activity
33    }
34}
35

1extension LiveStreamViewController {
2    func optimizeForNetworkConditions() {
3        // Set up network quality monitoring
4        
5        // Set initial stream quality
6        meeting?.localParticipant.setQuality(.high)
7    }
8    
9    @objc func handleNetworkQualityChange(_ notification: Notification) {
10        if let quality = notification.userInfo?["quality"] as? NetworkQuality {
11            // Adjust video quality based on network conditions
12            switch quality {
13            case .poor:
14                meeting?.localParticipant.setQuality(.low)
15                showNetworkWarningUI()
16            case .good:
17                meeting?.localParticipant.setQuality(.medium)
18                hideNetworkWarningUI()
19            case .excellent:
20                meeting?.localParticipant.setQuality(.high)
21                hideNetworkWarningUI()
22            }
23        }
24    }
25}
26