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Quickstart

Channelize.io iOS Call SDK along with API SDK and UI SDK helps you achieve the complete calling and real-time messaging solution.

NOTE: Channelize.io iOS Call SDK is using Channelize.io API SDK for networking and real-time events.

Install iOS Call SDK

Step 1: Integration

Note: Please make sure you use same integration method for all SDKs.

1. Manual Integration

Install SDK
  1. Download the Channelize Call SDK zip file from here.
  2. Extract the downloaded file to a folder. It will provide ChannelizeCall.xcframework file.
  3. Add it to your project in same way you have added ChannelizeAPI SDK.
Install Pods

Add following pods to the existing Podfile that you had created while installing API SDK.

Note: Don't put pod 'SDWebImageFLPlugin' if you are using UI SDK also. SDWebImageFLPlugin is already installed

  pod 'SDWebImageFLPlugin'
  pod 'AgoraRtcEngine_iOS', '2.9.0'

Now run below command to install the pods after navigating to project directory through terminal

pod install --verbose

2. Through Cocoapods

Install UI Kit Pod

Add UI Kit pod to the existing Podfile that you had created while installing API SDK.

pod 'ChannelizeCall', '>= 4.20.12'

Now run below command to install the pods after navigating to project directory through terminal

pod install --repo-update --verbose

Step 2: Create .plist file

Get you AGORA API Key by following steps mentioned here and add it to your Channelize-Info.plist file.

<key>AGORA_API_KEY</key>
<string>YOUR_AGORA_KEY</string>

Step 3: Project Settings

Go to Xcode Project > Capabilities pane.

Add Background Modes capabilities and Push Notification capabilities if not already added in your's project. If already added you can skip this part.

Select the checkbox for Voice over IP, remote notifications and background fetch as shown in image.

Now go to Xcode Project > General pane > Frameworks, Libraries, and Embeded Content. Add Callkit Framework as shown below.

Step 4: Create Voip Certificates

To recieve incoming call, you need to upload VoIP Certificate PEM File and VoIP Key PEM File in your Channelize dashboard.

For detailed Instructions please Click here.

Step 5: Use SDK Methods

Now use all classes and methods with the import statement.

import ChannelizeCall

Integrate Call SDK using API & UI SDKs

If you are using both Channelize.io iOS API and UI SDK, then you just need to enable the call feature in UI SDK by adding below lines of code in the customizations.

CHConstants.isChannelizeCallAvailable = true   // Set it true, if you want to enable call functionality otherwise set it to false.

Integrate Call SDK using API SDK

If you are not using Channelize.io UI SDK, follow the below process to make an outgoing call and handle an incoming call.

Make an Outgoing Call

Call the below method to start an outgoing call.

NameTypeRequiredDescription
navigationControllerUINavigationControlleryesCurrent navigation Controller of the app
userCHUseryesCHUser object of the call receiver.
typeStringyesThe type of call you want to make. Possible values are "voice" or "video"
 
CHCall.launchCallViewController(navigationController: UINAVIGATIONCONTROLLER, user: userObject, type: "video")

Receive an Incoming Call

Receive an incoming call following the below steps.

Step 1. Import Pushkit framework in AppDelegate.swift file.

Step 2: Create a variable for push registry

let pushRegistry = PKPushRegistry(queue: DispatchQueue.main)

Step 3: In didFinishLaunchingWithOptions method paste following code

pushRegistry.delegate = self
pushRegistry.desiredPushTypes = [.voIP]

Step 4: Confirm AppDelegate class to PKPushRegistryDelegate protocols and paste following code:

func pushRegistry(_ registry: PKPushRegistry, didUpdate pushCredentials: PKPushCredentials, for type: PKPushType) {
    let deviceToken = pushCredentials.token.reduce("", {$0 + String(format: "%02X", $1) })
    debugPrint("Token recieved - ",deviceToken)
    Channelize.updateVoipToken(token: deviceToken, completion: {(status,errorString) in
        if status {
            print("Voip Token Updated")
        } else {
            print("Failed to Update Voip Token with error \(errorString ?? "")")
        }
    })
}

func pushRegistry(_ registry: PKPushRegistry, didReceiveIncomingPushWith payload: PKPushPayload, for type: PKPushType) {

    if let callId = payload.dictionaryPayload["callId"] as? String{
        if let uid = payload.dictionaryPayload["userId"] as? String{
            if let uuidString = payload.dictionaryPayload["uuid"] as? String{
                if let uuid = UUID(uuidString: uuidString){
                    let call = CHActiveCall(uuid: uuid, callId: callId, uid: uid, isOutgoing: false)
                    call.displayName = payload.dictionaryPayload["displayName"] as? String
                    call.profileImageUrl = payload.dictionaryPayload["profileImageUrl"] as? String
                    if let callType = payload.dictionaryPayload["type"] as? String{
                        if callType == "video"{
                            call.type = .video
                        }
                    }
                    let backgroundTaskIdentifier = UIApplication.shared.beginBackgroundTask(expirationHandler: nil)
                    CHCall.showIncomingCall(call: call, completion: {_ in
                            UIApplication.shared.endBackgroundTask(backgroundTaskIdentifier)
                    })
                }
            }
        }
    }
}

func pushRegistry(_ registry: PKPushRegistry, didInvalidatePushTokenFor type: PKPushType) {
    print("\(#function) token invalidated")
}

Configuring Channelize.io Call SDK

To configure iOS Call SDK you need to add the following code in didFinishLaunchingWithOptions function of your project's AppDelegate.swift file.

    CHCall.configureVoiceVideo()

Xcode 11 and iOS 13 Changes

On iOS 13.0 and later, all VoIP pussh notifications be reported to the CallKit as a new call. If you fail to report a call to CallKit, the system will terminate your app. Repeatedly failing to report calls may cause the system to stop delivering any more VoIP push notifications to your app. If this occurs, the user will need to reinstall the app to get VoIP push notifications again.

Earlier, Channelize use VoIP notifications to handle call related functions like invite, end, reject, recieved and accept. Due to Apple's new guidelines, we are now using VoIP for only invite call action, which will reported as a call to Callkit. For other actions, we are now using Silent Push Notifications.

Configure App for Silent Push Notifications

Make sure you have implemented basic Push Notifications functionality mentioned here Push Notifications

After that, in func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any], fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) function in your AppDelegate file, put below code

func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any], fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {
    if (userInfo["callId"] as? String) != nil {
        CHCall.processCallActionNotification(userInfo: userInfo)
    }
    // Put your logic if you are already using Silent Push Notifications.
}
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