Last updated: 2023-11-29 18:22:50Download PDF
This document describes how to quickly integrate the TUICallKit component. Performing the following key steps generally takes about an hour, after which you can implement the video call feature with complete UIs.

Environment Preparations

iOS 9.0 (API level 16) or later.

Step 1. Activate the service

TUICallKit is an audio & video communication component built upon Tencent Cloud's paid PaaS services, Chat and Real-time Communication (TRTC) . In order for you to better experience the Call feature, we offer a 7-day free trial version for each SDKAppID (Note: no additional call duration is provided with the free trial version), You can activate the Call free trial version in the (Real-time Communication)TRTC console, with the specific operation steps as follows:

1. Log into the TRTC console > Call, and create a new application.

2. In the create pop-up window, select Call as the product and enter the application name. You can also choose to associate with an existing application to open Call for an existing TRTC application. After making the selection, click on Create application.

3. After completing the application creation, you will be directed to the application details page by default. In the pop-up window, select the "Trial Free" version and click on "Claim now".

4. After confirming the pop-up content, click on "Free Trail" to successfully open the trial version of audio and video calling.

5. After opening, you can view the version information on the current page and refer to the integration guide for integration.

Step 2. Download and import the component

Use CocoaPods to import the component as follows:
1. Add the following dependency to your Podfile.
pod 'TUICallKit'
2. Run the following command to install the component:
pod install
If the latest version of TUICallKit cannot be installed, run the following command to update the local CocoaPods repository list:
pod repo update

Step 3. Configure the project

Your app needs mic and camera permissions to implement audio/video communication. Add the two items below to Info.plist of your app. Their content is what users see in the mic and camera access pop-up windows.
<string>CallingApp needs to access your camera to capture video.</string>
<string>CallingApp needs to access your mic to capture audio.</string>


Step 4. Log in to the TUICallKit component

Add the following code to your project to call the relevant APIs in TUICore to log in to the TUICallKit component. This step is very important, as the user can use the component features properly only after a successful login. Carefully check whether the relevant parameters are correctly configured:
#import <TUICore/TUILogin.h>

// Log in to the component
[TUILogin login:1400000001 // Replace it with the `SDKAppID` obtained in step 1.
userID:@"denny" // Replace it with your `UserID`.
userSig:@"xxxxxxxxxxx" // You can calculate a `UserSig` in the console and enter it here.
NSLog(@"login success");
} fail:^(int code, NSString *msg) {
NSLog(@"login failed, code: %d, error: %@", code, msg);

import TUICore

// Log in to the component
TUILogin.login(1400000001, // Replace it with the `SDKAppID` obtained in step 1.
userID: "denny", // Replace it with your `UserID`.
userSig: "xxxxxxxxxxx") { // You can calculate a `UserSig` in the console and enter it here.
print("login success")
} fail: { (code, message) in
print("login failed, code: \(code), error: \(message ?? "nil")")

Parameter description: The key parameters used by the login function are as detailed below:
sdkAppId: Obtained in the last step in step 1 and not detailed here.
userId: The ID of the current user, which is a string that can contain only letters (a–z and A–Z), digits (0–9), hyphens (-), or underscores (_).
userSig: The authentication credential used by Tencent Cloud to verify whether the current user is allowed to use the TRTC service. You can get it by using the SecretKey to encrypt the information such as SDKAppID and UserID. You can generate a temporary UserSig by clicking the UserSig generation button in the console.

For more information, see UserSig.
Many developers have contacted us with many questions regarding this step. Below are some of the frequently encountered problems:
sdkAppId is invalid.
userSig is set to the value of Secretkey mistakenly. The userSig is generated by using the SecretKey for the purpose of encrypting information such as sdkAppId, userId, and the expiration time. But the value of the userSig that is required cannot be directly substituted with the value of the SecretKey.
userId is set to a simple string such as 1, 123, or 111, and your colleague may be using the same userId while working on a project simultaneously. In this case, login will fail as TRTC doesn't support login on multiple terminals with the same UserID. Therefore, we recommend you use some distinguishable userId values during debugging.
The sample code on GitHub uses the genTestUserSig function to calculate userSig locally, so as to help you complete the current integration process more quickly. However, this scheme exposes your SecretKey in the application code, which makes it difficult for you to upgrade and protect your SecretKey subsequently. Therefore, we strongly recommend you run the userSig calculation logic on the server and make the application request the userSig calculated in real time every time the application uses the TUICallKit component from the server.

Step 5. Make a call

One-to-one video call

You can call the call function of TUICallKit and specify the call type and the callee's userId to make an audio/video call.
#import <TUICallKit/TUICallKit.h>

// Make a one-to-one video call. Suppose the `userId` is `mike`.
[[TUICallKit createInstance] call:@"mike" callMediaType:TUICallMediaTypeVideo];

import TUICallKit

// Make a one-to-one video call. Suppose the `userId` is `mike`.
TUICallKit.createInstance().call(userId: "mike", callMediaType: .video)

The ID of the target user, such as "mike".
The call media type, such as TUICallMediaTypeVideo.

Group video call

You can call the groupCall function of TUICallKit and specify the call type and the list of callees' UserID values to make a group audio/video call.
#import <TUICallKit/TUICallKit.h>

[[TUICallKit createInstance] groupCall:@"12345678" userIdList:@[@"denny", @"mike", @"tommy"] callMediaType:TUICallMediaTypeVideo];

import TUICallKit

TUICallKit.createInstance().groupCall(groupId: "12345678", userIdList: ["denny", "mike", "tommy"], callMediaType: .video)
The group ID, such as @"12345678".
The list of userId values of the target users, such as @[@"denny", @"mike", @"tommy"].
The call media type, such as TUICallMediaTypeVideo.
You can create a group as instructed in Android, iOS, and macOS. You can also use Chat TUIKit to integrate chat and call scenarios at one stop.
TUICallKit currently doesn't support making a group video call among users not in a group. If you have such a need, please contact

Step 6. Answer a call

After step 4, when receiving an incoming call, the TUICallKit component will automatically display the call answering UI.

Step 7. Implement more features

1. Nickname and profile photo settings

To customize the nickname or profile photo, use the following API for update:
[[TUICallKit createInstance] setSelfInfo:@"nickname" avatar:@"profile photo URL" succ:^{

} fail:^(int code, NSString *errMsg) {


TUICallKit.createInstance().setSelfInfo(nickname: "nickname", avatar: "profile photo URL", succ: {

}) { code, desc in


The update of the callee's nickname and profile photo may be delayed during a call between non-friend users due to the user privacy settings. After a call is made successfully, the information will also be updated properly in subsequent calls.

2. Offline call push

You can make/answer audio or video calls after completing the above steps. However, if you want your users to be able to receive call invitations even when your application is in the background or after it is closed, then you need to also implement the offline call push feature. For more information, see Offline Call Push (iOS).

3. Floating window

To implement the floating window feature in your application, call the following API when initializing the TUICallKit component:
[[TUICallKit createInstance] enableFloatWindow:YES];


4. Listening on the call status

To listen on the call status (for example, the start or end of a call or the call quality during a call), listen on the following events:
#import <TUICallEngine/TUICallEngine.h>

[[TUICallEngine createInstance] addObserver:self];

- (void)onCallBegin:(TUIRoomId *)roomId callMediaType:(TUICallMediaType)callMediaType callRole:(TUICallRole)callRole {

- (void)onCallEnd:(TUIRoomId *)roomId callMediaType:(TUICallMediaType)callMediaType callRole:(TUICallRole)callRole totalTime:(float)totalTime {

- (void)onUserNetworkQualityChanged:(NSArray<TUINetworkQualityInfo *> *)networkQualityList {


import TUICallEngine


public func onCallBegin(roomId: TUIRoomId, callMediaType: TUICallMediaType, callRole: TUICallRole) {

public func onCallEnd(roomId: TUIRoomId, callMediaType: TUICallMediaType, callRole: TUICallRole, totalTime: Float) {

public func onUserNetworkQualityChanged(networkQualityList: [TUINetworkQualityInfo]) {


5. Custom ringtone

You can use the following API to customize the ringtone:
[[TUICallKit createInstance] setCallingBell:filePath];

TUICallKit.createInstance().setCallingBell(filePath: filePath)

6. Custom call timeout period

You can set callParams when invoke call, groupCall,inviteUser to change your call timeout period.
TUICallParams *callParams = [TUICallParams new];
callParams.offlinePushInfo = [TUIOfflinePushInfo new];
callParams.timeout = 30;
callParams.userData = @"user data";
[[TUICallKit createInstance] call:@"mike" callMediaType:TUICallMediaTypeVideo params:callParams succ:nil fail:nil];
let callParams = TUICallParams()
let offlinePushInfo = TUIOfflinePushInfo()
callParams.offlinePushInfo = offlinePushInfo
callParams.timeout = 30
callParams.userData = "user data"
TUICallKit.createInstance().call(userId: "mike", callMediaType: .video, params: callParams) {



1. What should I do if I receive the error message "The package you purchased does not support this ability"?

The error message indicates that your application's audio/video call capability package has expired or is not activated. You can claim or activate the audio/video call capability as instructed in step 1 to continue using TUICallKit.

2. How to purchase official version?

please refer to Purchase Official Version.

Suggestions and Feedback

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