tencent cloud

// Obtain the SDKAppID from the Instant Messaging (IM) console.
// Add a V2TIMSDKListener event listener. The self is the implementation class of id<V2TIMSDKListener>. This step can be skipped if you do not need to listen for events from the IM SDK.
[[V2TIMManager sharedInstance] addIMSDKListener:self];
// Initialize the IM SDK. After calling this API, you can immediately call the log-in API.
[[V2TIMManager sharedInstance] initSDK:sdkAppID config:config];

// After the SDK is initialized, it will trigger various events, such as connection status and expiration of log-in credentials
- (void)onConnecting {
    NSLog(@"The IM SDK is connecting to the Cloud Virtual Machine");
}

- (void)onConnectSuccess {
    NSLog(@"The IM SDK has successfully connected to the Cloud Virtual Machine");
}

// Remove event listener
// The self is the implementation class of id<V2TIMSDKListener>
[[V2TIMManager sharedInstance] removeIMSDKListener:self];
// Deinitialize the SDK
[[V2TIMManager sharedInstance] unInitSDK];

// Create TRTC SDK instance (single instance pattern)
self.trtcCloud = [TRTCCloud sharedInstance];
// Set event listeners
self.trtcCloud.delegate = self;

// Notifications from various SDK events (e.g., error codes, warning codes, audio and video status parameters, etc.)
- (void)onError:(TXLiteAVError)errCode errMsg:(nullable NSString *)errMsg extInfo:(nullable NSDictionary *)extInfo {
    NSLog(@"%d: %@", errCode, errMsg);
}

- (void)onWarning:(TXLiteAVWarning)warningCode warningMsg:(nullable NSString *)warningMsg extInfo:(nullable NSDictionary *)extInfo {
    NSLog(@"%d: %@", warningCode, warningMsg);
}

// Remove event listener
self.trtcCloud.delegate = nil;
// Destroy TRTC SDK instance (single instance pattern)
[TRTCCloud destroySharedIntance];

// Log in: userID can be defined by the user and userSig can be generated as per step 1
[[V2TIMManager sharedInstance] login:userID userSig:userSig succ:^{
    NSLog(@"success");
} fail:^(int code, NSString *desc) {
    // The following error codes indicate an expired userSig, and you need to generate a new one for log-in again.
    // 1. ERR_USER_SIG_EXPIRED(6206).
    // 2. ERR_SVR_ACCOUNT_USERSIG_EXPIRED(70001).
    // Note: Do not call the log-in API in case of other error codes. Otherwise, the IM SDK may enter an infinite loop of log-in.
    NSLog(@"failure, code:%d, desc:%@", code, desc);
}];

// Log out
[[V2TIMManager sharedInstance] logout:^{
    NSLog(@"success");
} fail:^(int code, NSString *desc) {
    NSLog(@"failure, code:%d, desc:%@", code, desc);
}];

- (void)setupTRTC {
    // Set video encoding parameters to determine the picture quality seen by remote users
    TRTCVideoEncParam *encParam = [[TRTCVideoEncParam alloc] init];
    encParam.videoResolution = TRTCVideoResolution_960_540;
    encParam.videoFps = 15;
    encParam.videoBitrate = 850;
    encParam.resMode = TRTCVideoResolutionModePortrait;
    [self.trtcCloud setVideoEncoderParam:encParam];
 
    // Enable local camera preview (you can specify to use the front/rear camera for video capture)
    [self.trtcCloud startLocalPreview:self.isFrontCamera view:self.previewView];
}

// Construct custom data
NSDictionary *dic = @{
    @"cmd": @"av_call",
    @"msg": @{
        // Specify the call type (video call, audio call)
        @"callType": @"videoCall",
        // Specify the TRTC room ID (caller can generate it randomly)
        @"roomId": @"xxxRoomId",
    },
};
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dic
                                                   options:NSJSONWritingPrettyPrinted
                                                     error:nil];
if (jsonData) {
    NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
    // Send call invitation signaling
    [[V2TIMManager sharedInstance] invite:self.receiverId data:jsonString onlineUserOnly:false offlinePushInfo:self.offlinePushInfo timeout:self.timeout succ:^{
        // Successfully send call invitation signaling
        // Render call page, play call ringtone
    } fail:^(int code, NSString *desc) {
        // Failed to send call invitation signaling
        // Prompt call failure, you can try to retry
    }];
}

[[V2TIMManager sharedInstance] addSignalingListener:self];

#pragma mark - V2TIMSignalingListener

// Callee receives the call request. The inviteID is the request ID, and inviter is the caller ID
- (void)onReceiveNewInvitation:(NSString *)inviteID inviter:(NSString *)inviter groupID:(NSString *)groupID inviteeList:(NSArray<NSString *> *)inviteeList data:(NSString *)data {
    if (data && ![data isEqualToString:@""]) {
        NSData *jsonData = [data dataUsingEncoding:NSUTF8StringEncoding];
        NSDictionary *dictionary = [NSJSONSerialization JSONObjectWithData:jsonData
                                                                   options:NSJSONReadingMutableContainers
                                                                     error:nil];
        if (dictionary) {
            NSString *command = dictionary[@"cmd"];
            NSDictionary *msg = dictionary[@"msg"];
            if ([command isEqualToString:@"av_call"]) {
                NSString *callType = msg[@"callType"];
                NSString *roomId = msg[@"roomId"];
                
                // Render call page, play call ringtone
            }
        }
    }
}

if ([callType isEqualToString:@"videoCall"]) {
    // Set video encoding parameters to determine the picture quality seen by remote users
    TRTCVideoEncParam *encParam = [[TRTCVideoEncParam alloc] init];
    encParam.videoResolution = TRTCVideoResolution_960_540;
    encParam.videoFps = 15;
    encParam.videoBitrate = 850;
    encParam.resMode = TRTCVideoResolutionModePortrait;
    [self.trtcCloud setVideoEncoderParam:encParam];

    // Enable local camera preview (you can specify to use the front/rear camera for video capture)
    [self.trtcCloud startLocalPreview:self.isFrontCamera view:self.previewView];
}

[[V2TIMManager sharedInstance] cancel:inviteId data:data succ:^{
    // Successfully cancel the call request
    // Terminate the call page, and stop the call ringtone
} fail:^(int code, NSString *desc) {
    // Failed to cancel call request
    // Prompt cancel failure, and you can retry
}];

#pragma mark - V2TIMSignalingListener

- (void)onInvitationCancelled:(NSString *)inviteID inviter:(NSString *)inviter data:(NSString *)data {
    // Terminate the call page, and stop the call ringtone
}

#pragma mark - V2TIMSignalingListener

- (void)onInvitationTimeout:(NSString *)inviteID inviteeList:(NSArray<NSString *> *)inviteeList {
    // Prompt call timeout. Terminate the call page, and stop the call ringtone
}

[[V2TIMManager sharedInstance] accept:inviteId data:data succ:^{
    // Answer successfully, render the call page, and stop the call ringtone
    if ([callType isEqualToString:@"videoCall"]) {
        // Start video call
        [self startVideoCall];
    } else {
        // Start audio call
        [self startAudioCall];
    }
} fail:^(int code, NSString *desc) {
    // Answer failed, prompt for exception or retry
}];

#pragma mark - V2TIMSignalingListener

- (void)onInviteeAccepted:(NSString *)inviteID invitee:(NSString *)invitee data:(NSString *)data {
    if ([self.callType isEqualToString:@"videoCall"]) {
        // Start video call
        [self startVideoCall];
    } else {
        // Start audio call
        [self startAudioCall];
    }
}

- (void)startAudioCall {
    TRTCParams *params = [[TRTCParams alloc] init];
    // TRTC authentication credential, generated on the server
    params.sdkAppId = SDKAPPID;
    // TRTC application ID, obtained from the console
    params.userSig = USERSIG;
    // Take the room ID string as an example
    params.strRoomId = self.roomId;
    // Username, it is recommended to stay sync with IM
    params.userId = self.userId;
    
    [self.trtcCloud startLocalAudio:TRTCAudioQualitySpeech];
    [self.trtcCloud enterRoom:params appScene:TRTCAppSceneAudioCall];
}

// Mark whether the call is in progress
@property (nonatomic, assign) BOOL isOnCalling;

#pragma mark - TRTCCloudDelegate

// Event callback for the result of entering the room
- (void)onEnterRoom:(NSInteger)result {
    if (result > 0) {
        // Room entry successful, indicates that the call is in progress
        self.isOnCalling = YES;
    } else {
        // Failed to enter the room, prompt for call exception
        self.isOnCalling = NO;
    }
}

- (void)startVideoCall {
    TRTCParams *params = [[TRTCParams alloc] init];
    // TRTC authentication credential, generated on the server
    params.sdkAppId = SDKAPPID;
    // TRTC application ID, obtained from the console
    params.userSig = USERSIG;
    // Take the room ID string as an example
    params.strRoomId = self.roomId;
    // Username, it is recommended to stay sync with IM
    params.userId = self.userId;
    
    [self.trtcCloud startLocalAudio:TRTCAudioQualitySpeech];
    [self.trtcCloud enterRoom:params appScene:TRTCAppSceneVideoCall];
}

// Mark whether the call is in progress
@property (nonatomic, assign) BOOL isOnCalling;

#pragma mark - TRTCCloudDelegate

// Event callback for the result of entering the room
- (void)onEnterRoom:(NSInteger)result {
    if (result > 0) {
        // Room entry successful, indicates that the call is in progress
        self.isOnCalling = YES;
    } else {
        // Failed to enter the room, prompt for call exception
        self.isOnCalling = NO;
    }
}

// Pull remote video stream
- (void)onUserVideoAvailable:(NSString *)userId available:(BOOL)available {
    // The remote user publishes/unpublishes the primary video
    if (available) {
        // Subscribe to the remote user's video stream and bind the video rendering control
        [self.trtcCloud startRemoteView:userId streamType:TRTCVideoStreamTypeBig view:self.previewView];
    } else {
        // Unsubscribe to the remote user's video stream and release the rendering control
        [self.trtcCloud stopRemoteView:userId streamType:TRTCVideoStreamTypeBig];
    }
}

NSDictionary *dic = @{
    @"cmd": @"av_call",
    @"msg": @{
        // Specify the call type (video call, audio call)
        @"callType": @"videoCall",
        // Specify rejection type (Proactive Rejection, Busy Line Rejection)
        @"reason": @"active",
    },
};
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dic
                                                   options:NSJSONWritingPrettyPrinted
                                                     error:nil];
if (jsonData) {
    NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
    [[V2TIMManager sharedInstance] reject:self.inviteId data:jsonString succ:^{
        // Rejection successful. Terminate the call page, and stop the call ringtone
    } fail:^(int code, NSString *desc) {
        // Rejection failed, prompt for exception or retry
    }];
}

#pragma mark - V2TIMSignalingListener

- (void)onInviteeRejected:(NSString *)inviteID invitee:(NSString *)invitee data:(NSString *)data {
    if (data && ![data isEqualToString:@""]) {
        NSData *jsonData = [data dataUsingEncoding:NSUTF8StringEncoding];
        NSDictionary *dictionary = [NSJSONSerialization JSONObjectWithData:jsonData
                                                                   options:NSJSONReadingMutableContainers
                                                                     error:nil];
        if (dictionary) {
            NSString *command = dictionary[@"cmd"];
            NSDictionary *msg = dictionary[@"msg"];
            if ([command isEqualToString:@"av_call"]) {
                NSString *reason = msg[@"reason"];
                if ([reason isEqualToString:@"active"]) {
                    // Prompt that the other party rejects call
                } else if ([reason isEqualToString:@"busy"]) {
                    // Prompt that the other party is busy
                }
                
                // Terminate the call page, and stop the call ringtone
            }
        }
    }
}

- (void)onReceiveNewInvitation:(NSString *)inviteID inviter:(NSString *)inviter groupID:(NSString *)groupID inviteeList:(NSArray<NSString *> *)inviteeList data:(NSString *)data {
    if (data && ![data isEqualToString:@""]) {
        NSData *jsonData = [data dataUsingEncoding:NSUTF8StringEncoding];
        NSDictionary *dictionary = [NSJSONSerialization JSONObjectWithData:jsonData
                                                                   options:NSJSONReadingMutableContainers
                                                                     error:nil];
        if (dictionary) {
            NSString *command = dictionary[@"cmd"];
            NSDictionary *msg = dictionary[@"msg"];
            if ([command isEqualToString:@"av_call"] && self.isOnCalling) {
                NSDictionary *dic = @{
                    @"cmd": @"av_call",
                    @"msg": @{
                        // Specify the call type (video call, audio call)
                        @"callType": @"videoCall",
                        // Specify rejection type (Proactive Rejection, Busy Line Rejection)
                        @"reason": @"busy",
                    },
                };
                NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dic
                                                                   options:NSJSONWritingPrettyPrinted
                                                                     error:nil];
                if (jsonData) {
                    NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
                    // Local call is in progress, and sends busy line rejection signal
                    [[V2TIMManager sharedInstance] reject:inviteID data:jsonString succ:^{
                        // Busy line rejection successful
                    } fail:^(int code, NSString *desc) {
                        // Busy line rejection failed
                    }];
                }
            }
        }
    }
}

- (void)hangup {
    [self.trtcCloud stopLocalAudio];
    [self.trtcCloud stopLocalPreview];
    [self.trtcCloud exitRoom];
}

#pragma mark - TRTCCloudDelegate

- (void)onExitRoom:(NSInteger)reason {
    // Successfully exited the room and hung up the call
    self.isOnCalling = NO;
}

#pragma mark - TRTCCloudDelegate

- (void)onRemoteUserLeaveRoom:(NSString *)userId reason:(NSInteger)reason {
    [self hangup];
}

- (void)onExitRoom:(NSInteger)reason {
    // Successfully exited the room and hung up the call
    self.isOnCalling = NO;
}

// Turn the mic on
[self.trtcCloud muteLocalAudio:NO];
// Turn the mic off
[self.trtcCloud muteLocalAudio:YES];