iOS SDK V2 - Reference
The Plivo iOS SDK allows you to create applications capable of making and receiving calls in your iOS app. This document gives an overview of different classes and methods available in Plivo iOS SDK v2.
Initialization of Application
Registering an endpoint
The following code demonstrates registering an endpoint using a Plivo SIP URI and its password.
NSString *username = @"Tatooine";
NSString *password = @"Jabba";
PlivoEndpoint *endpoint = [[PlivoEndpoint alloc] init];
[endpoint login:username AndPassword:password];
Access to Microphone
We have to provide Microphone access before making an outbound call or receiving an incoming call using AVFoundation
import AVFoundation
//Request Record permission
let session = AVAudioSession.sharedInstance()
if (session.responds(to: #selector(AVAudioSession.requestRecordPermission(_:)))) {
AVAudioSession.sharedInstance().requestRecordPermission({(granted: Bool)-> Void in
if granted {
print("granted AVAudioSession permission")
do {
try session.setCategory(AVAudioSession.Category.playAndRecord, mode: .default, options: [])
try session.setActive(true)
}
catch {
print("Couldn't set Audio session category")
}
} else{
print("not granted AVAudioSession permission")
}
})
}
Examples for basic call actions
Making an outbound call
The following code demonstrates making an outbound call from the SDK.
NSString *toURI = @"sip:Coruscant@phone.plivo.com";
PlivoOutgoing *outgoing = [endpoint createOutgoingCall];
[outgoing call:toURI];
Receiving a call
The following code demonstrates receiving an incoming call in the SDK.
(void)onIncomingCall:(PlivoIncoming*)incoming
{
*// Answer the call*
[incoming answer];
}
Note: For more information on implementing incoming call in your iOS application, see the push notification section.
Classes and Methods
Class: PlivoEndpoint (PlivoEndpoint.h)
PlivoEndpoint (PlivoEndpoint.h) class allows you to register a Plivo SIP Endpoint. Once an endpoint is registered, you can make or receive calls using the endpoint. Following are the methods available in the PlivoEndpoint class.
Method 1: Registering an Endpoint
You can register an endpoint using:
- Username, Password, and Device Token.
- Username, Password, and Timeout.
- Username and Password.
Registering an Endpoint- Using Username, Password and Device Token
Following are the parameters to be passed:
- username(username of the endpoint).
- password(password of the endpoint).
- token(device token for VOIP push notifications), Device token from APNS can be obtained by registering for Push Notifications.
If the endpoint is successfully registered a notification would be sent to the delegate registerSuccess. In case of a failure a notification is sent to the delegate registerFailure.
(void)login:(NSString *)username AndPassword:(NSString *)password DeviceToken:(NSData*)token;
Usage
func login(withUserName userName: String, andPassword password: String, deviceToken token: Data) {
endpoint.login(userName, andPassword: password, deviceToken: token)
}
Registering an Endpoint- Using Username, Password and Timeout
Following are the parameters to be passed:
- username(username of the endpoint).
- password(password of the endpoint).
- regTimeout(Expiration time for registration in seconds).
If the endpoint is successfully registered a notification would be sent to the delegate registerSuccess. In case of a failure a notification is sent to the delegate registerFailure.
(void)login:(NSString *)username AndPassword:(NSString *)password RegTimeout:(int)regTimeout;
Usage
func login(withUserName userName: String, andPassword password: String, withRegTimeout timeout: int) {
endpoint.login(userName, andPassword: password, regTimeout: timeout)
}
Registering an Endpoint- Using Username and Password
Following are the parameters to be passed:
- username(username of the endpoint).
- password(password of the endpoint).
If the endpoint is successfully registered, a notification will be sent to the registerSuccess delegate. In case of a failure, a notification is sent to the registerFailure delegate.
(void)login:(NSString*) username AndPassword:(NSString*) password;
Usage
func login(withUserName userName: String, andPassword password: String) {
UtilClass.makeToastActivity()
endpoint.login(userName, andPassword: password)
}
Method 2: Unregister an Endpoint
This method is used to unregister an endpoint.
(void)logout;
Method 3: Create Object for initiating Outbound calls
Calling this method returns a PlivoOutgoing object, linked to the registered endpoint. Calling this method on an unregistered PlivoEndpoint object returns an empty object.
(PlivoOutgoing*)createOutgoingCall;
Class: PlivoOutgoing (PlivoOutgoing.h)
PlivoOutgoing class contains methods to make and control an outbound call.
Method 1: Initiate Outbound calls
Calling this method on the PlivoOutgoing object with the SIP URI would initiate an outbound call.
(void)call:(NSString *)sipURI error:(NSError **)error;
Method 2: Initiate Outbound calls with custom SIP headers
Calling this method on the PlivoOutgoing object with the SIP URI would initiate an outbound call with custom SIP headers.
(void)call:(NSString *)sipURI headers:(NSDictionary *)headers error:(NSError **)error;
Usage
func call(withDest dest: String, andHeaders headers: [AnyHashable: Any], error: inout NSError?) -> PlivoOutgoing {
/* construct SIP URI , where kENDPOINTURL is a contant contaning domain name details*/
let sipUri: String = "sip:\(dest)\(kENDPOINTURL)"
/* create PlivoOutgoing object */
outCall = (endpoint.createOutgoingCall())!
/* do the call */
outCall?.call(sipUri, headers: headers, error: &error)
return outCall!
}
//To Configure Audio
func configureAudioSession() {
endpoint.configureAudioDevice()
}
Method 3: Mute a call
Calling this method on the PlivoOutgoing object mutes the call.
(void)mute;
Usage
func onIncomingCall(_ incoming: PlivoIncoming) {
..
// assign incCall var
incCall = incoming
}
// to mute incoming call
if (incCall != nil) {
incCall?.mute()
}
Method 4: Unmute a call
Calling this method on the PlivoOutgoing object unmutes the call.
(void)unmute;
Usage
if (incCall != nil) {
incCall?.unmute()
}
Method 5: Send Digits
Calling this method on the PlivoOutgoing object with the digits sends DTMF on that call. DTMF input only supports 0-9 , *, and #.
(void)sendDigits:(NSString*)digits;
Usage
func getDtmfText(_ dtmfText: String) {
if (incCall != nil) {
incCall?.sendDigits(dtmfText)
..
}
}
Method 6: Hangup a call
Calling this method on the PlivoOutgoing object would hang up the call.
(void)hangup;
Usage
if (self.incCall != nil) {
print("Incoming call - Hangup");
self.incCall?.hangup()
self.incCall = nil
}
Method 7: Hold a call
Calling this method on the PlivoOutgoing object disconnects the audio devices during an audio interruption.
(void)hold;
Usage
if (incCall != nil) {
incCall?.hold()
}
if (outCall != nil) {
outCall?.hold()
}
Phone.sharedInstance.stopAudioDevice()
Method 8: Unhold a call
Calling this method on the PlivoOutgoing object reconnects the audio devices after an audio interruption.
(void)unhold;
Description
Usage
if (incCall != nil) {
incCall?.unhold()
}
if (outCall != nil) {
outCall?.unhold()
}
Phone.sharedInstance.startAudioDevice()
Class: PlivoIncoming(PlivoIncoming.h)
PlivoIncoming class contains methods to handle incoming call. An object of this class will be received on the following delegate.
(void)incomingCall:(PlivoIncoming*) incoming;
Method 1: Answer an Incoming call
Calling this method on the PlivoIncoming object answers the call.
(void)answer;
Usage
func provider(_ provider: CXProvider, perform action: CXAnswerCallAction) {
//Answer the call
incCall?.answer()
outCall = nil
action.fulfill()
Method 2: Reject an Incoming call
Calling this method on the PlivoIncoming object rejects the call.
(void)reject;
Usage
if (self.incCall != nil) {
print("Incoming call - Reject");
self.incCall?.reject()
self.incCall = nil
}
PlivoEndpoint Delegates
Delegate 1: On Login
Delegate
(void)onLogin;
Description When registration to an endpoint is successful.
Parameters Error details
Return Value None
Delegate 2: Handling Login Failure
Delegate
(void)onLoginFailure;
Description This delegate gets called when registration to an endpoint fails.
Parameters None
Return Value None
Delegate 3: Handling Login Failure with Errors
Delegate
(void)onLoginFailedWithError:(NSError *)error;
Description This delegate gets called when registration to an endpoint fails.
Parameters Error details
Return Value None
Delegate 4: On Incoming Call
Delegate
(void)onIncomingCall:(PlivoIncoming*)incoming;
Description This delegate gets called when there is an incoming call to a registered endpoint
Parameters Incoming object
Return Value None
Delegate 5: On Incoming Call Rejected
Delegate
(void)onIncomingCallRejected:(PlivoIncoming*)incoming;
Description On an incoming call, if the call is disconnected by the caller, this delegate would be triggered with the PlivoIncoming object.
Parameters Incoming object
Return Value None
Delegate 6: On Incoming Call Hangup
Delegate
(void)onIncomingCallHangup:(PlivoIncoming*)incoming;
Description On an incoming call, if the call is disconnected by the caller after being answered, this delegate would be triggered with the PlivoIncoming object.
Parameters Incoming object
Return Value None
Delegate 7: On Incoming Digit
Delegate
(void)onIncomingDigit:(NSString*)digit;
Description On an active endpoint, this delegate would be called with the digit received on the call.
Parameters String for DTMF digit
Return Value None
Delegate 8: On Outgoing Call Answer
Delegate
(void)onOutgoingCallAnswered:(PlivoOutgoing*)call;
Description When an outgoing call is answered, this delegate would be called with the PlivoOutgoing object.
Parameters Outgoing object
Return Value None
Delegate 9: On Outgoing Call Ringing
Delegate
(void)onOutgoingCallRinging:(PlivoOutgoing*)call;
Description When an outgoing call is ringing, this delegate would be called with the PlivoOutgoing object.
Parameters Outgoing object
Return Value None
Delegate 10: On Outgoing Call Rejected
Delegate
(void)onOutgoingCallRejected:(PlivoOutgoing*)call;
Description When an outgoing call is rejected by the called number, this delegate would be called with the PlivoOutgoing object.
Parameters Outgoing object
Return Value None
Delegate 11: On Outgoing Call Hangup
Delegate
(void)onOutgoingCallHangup:(PlivoOutgoing*)call;
Description When an outgoing call is disconnected by the called number after the call has been answered.
Parameters Outgoing object
Return Value None
Delegate 12: On Outgoing Call Invalid
Delegate
(void)onOutgoingCallInvalid:(PlivoOutgoing*)call;
Description When an outgoing call is made to an invalid number, this delegate would be called with the PlivoOutgoing object.
Parameters Outgoing object
Return Value None
Receiving Incoming SIP Headers
You can receive custom SIP headers on an incoming call as a part of the PlivoIncoming object on the ‘onIncomingCall’ delegate. For example:
(void)onIncomingCall:(PlivoIncoming*)incoming
{
if ([incoming.extraHeaders count] > 0) {
NSLog(@"-- Incoming call extra headers --");
for (NSString *key in incoming.extraHeaders) {
NSString *value = [incoming.extraHeaders objectForKey:key];
NSLog(@"%@ => %@", key, value);
}
}
*// Answer the call here.*
}
Resetting your Endpoint
You must manually reset the endpoint object and create a new object for the following two cases:
- Your application goes in and out of network connectivity.
- Your application became active after coming up from the background.
An example for the same is provided below.
(void)applicationDidBecomeActive:(UIApplication *)application
{
[PlivoEndpoint resetEndpoint];
self.endpoint = [[PlivoEndpoint alloc] init];
}
Methods supporting Pushkit and Callkit in PlivoEndpoint
APIs for pushkit Integration
Method 1: Register Token
This method is used to register the device token for VOIP push notifications.
(void)registerToken:(NSData*)token;
Method 2: Relay Push Notification
pushInfo is the NSDictionary object forwarded by the apple push notification.
(void)relayVoipPushNotification:(NSDictionary *)pushInfo;
Usage
func pushRegistry(_ registry: PKPushRegistry, didReceiveIncomingPushWith payload: PKPushPayload, forType type: PKPushType)
{
Phone.sharedInstance.relayVoipPushNotification(payload.dictionaryPayload)
payload.dictionaryPayload contains below info:
{
alert = "plivo";
callid = "ABC-456-DEF-789-GHI";
sound = default;
}
Pass the payload.dictionaryPayload to relayVoipPushNotification API and then you will receive incoming calls the same way.
}
APIs for Callkit Integration
Following are the three apis that are required for Apple Callkit integration.
Method 1: Configure Audio Session
This method is used to Configure audio session before the call.
(void)configureAudioSession
Method 2: Start Audio Device
Depending on the call status (Hold or Active) you’ll want to start or stop processing the call’s audio. Use this method to signal the SDK to start audio I/O units when receiving the audio activation callback from CallKit.
(void)startAudioDevice
Method 3: Stop Audio Device
Depending on the call status(Hold or Active) you’ll want to start, or stop processing the call’s audio , use this method to signal the SDK to stop audio I/O units when receiving deactivation or reset callbacks from CallKit
(void)configureAudioSession
Usage
To Configure Audio
func configureAudioSession() {
endpoint.configureAudioDevice()
}
Start the Audio service to handle audio interruptions use AVAudioSessionInterruptionTypeBegan and AVAudioSessionInterruptionTypeEnded.
func startAudioDevice() {
endpoint.startAudioDevice()
}
func stopAudioDevice() {
endpoint.stopAudioDevice()
}
To turn on the speakers
do {
try audioSession.overrideOutputAudioPort(AVAudioSessionPortOverride.speaker)
} catch let error as NSError {
print("audioSession error: \(error.localizedDescription)")
}
To turn off the speakers
set AVAudioSessionPortOverride:none