ios - 我们如何使用 pjsip 和 callkit 处理多个调用

Question

我们正面临一个关于 iOS 的 callKit 框架的问题。

我们必须在应用中实现以下功能。

• 一对一通话(工作正常)。
• 我们可以结束并接听第二个电话(工作正常)。
• 我们可以保留和接听电话(最多 2 个电话)。
• 我们可以在通话之间切换。
• 保持/取消保持当前通话。

问题:我们面临的问题是:

• 保持并接受时，我们可以接受没有音频的第二个电话。

• 调用套件中的切换调用按钮已禁用。

我们已经完成了以下用于处理多个调用的实现:

We are reporting new call by following method.

- (void)reportNewIncomingCallWithUUID:(nonnull NSUUID *)UUID handle:(nonnull NSString *)handle
                       completion:(nullable void (^)(NSError *_Nullable error))completion {

CXCallUpdate *update = [[CXCallUpdate alloc] init];
update.remoteHandle = [[CXHandle alloc] initWithType:CXHandleTypeGeneric value:handle];
update.hasVideo = NO;
update.supportsDTMF = YES;
update.supportsHolding = YES;
update.supportsGrouping = YES;
update.supportsUngrouping = YES;    
[_provider reportNewIncomingCallWithUUID:UUID update:update completion:^(NSError * _Nullable error) {
    completion(error);
    if (!error) {
    }
}];     
}

On second call It will ask user for (End & Accept) OR (Hold & Accept)

this is how we are getting second call view

When we click on hold and accept

    - (BOOL)provider:(CXProvider *)provider executeTransaction:(CXTransaction* )transaction
{
    NSLog(@"executeTransaction : %@", transaction.debugDescription);
    BOOL callEnd = NO;
    BOOL callHold= NO;
    BOOL callAnswer = NO;


    NSPredicate *filter = [NSPredicate predicateWithFormat:@"self isKindOfClass: %@", [CXEndCallAction class]];
    NSArray *ends = [transaction.actions filteredArrayUsingPredicate:filter];
    callEnd = [ends count] >= 1;

    filter = [NSPredicate predicateWithFormat:@"self isKindOfClass: %@", [CXAnswerCallAction class]];
    NSArray *answer = [transaction.actions filteredArrayUsingPredicate:filter];
    callAnswer = [answer count] >= 1;

    filter = [NSPredicate predicateWithFormat:@"self isKindOfClass: %@", [CXSetHeldCallAction class]];
    NSArray *hold = [transaction.actions filteredArrayUsingPredicate:filter];
    callHold = [hold count] >= 1;


    if(callHold && callAnswer){
            pjsua_set_no_snd_dev();
        Call *currentCallObject = [self getCallObjectFromUUID:callAnswer.callUUID];
        if (currentCallObject != nil) {

            pjsua_call_id callId;
            callId = currentCallObject._call_id;            
            [self startAudio];
            [currentCallObject answerCallWithCompletion:^(BOOL isSucceed) {
                if (isSucceed) {
                    CallInfo *callForHold;
                    callForHold = [self getCallToBeHoldFromUUID:callHold.callUUID];                    
                    if (callForHold != nil) {
                        [callForHold holdCurrentCall];
                    }
                }
            }];
        }


        return YES;

    }else{
        return NO;
    }
}

This is how we are accepting second call while hold and accept. Which is working fine with no audio activated for accepted call. and following method is been called :

- (void)provider:(CXProvider *)provider didDeactivateAudioSession:(AVAudioSession *)audioSession{

现在交换电话的按钮被禁用了。

查询:

• 如何解决音频问题？
• 我们可以启用切换调用按钮吗？
• 如果启用该按钮，那么在切换调用时将调用哪个方法？

伙计们，如果有人使用过 callKit 和 pjsip，请帮我解决这个问题。谢谢。

Answer 1

接听电话时请完成保持 Action 以确保callkit保持当前通话。这将启用交换调用按钮。

不要忘记为 CXCallUpdate 启用以下内容:

update.supportsHolding = YES;
update.supportsGrouping = NO;
update.supportsUngrouping = NO;



 -(void)provider:(CXProvider *)provider performSetHeldCallAction:(CXSetHeldCallAction *)action{
               if (action.onHold) {
                    [callForHold holdCurrentCall];
                }else{
                    [callForHold unHoldCurrentCall];
                }

            [action fulfill];
        }

Above is the code for hold. don't forget to do [action fulfill]

当你点击 swap 按钮时，CXHeldCall 会被触发 2 次:

• 一个调用要保持(从action的callUUID中找到调用对象并保持该调用)
• 要取消保持的第二次调用(从操作的 callUUID 中找到调用对象并取消保持该调用)

Cheers ;)