SINCallClientDelegate
Objective-C
@protocol SINCallClientDelegate <NSObject>Swift
protocol SINCallClientDelegate : NSObjectProtocolThe delegate of a SINCallClient object must adopt the SINCallClientDelegate protocol.
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                  Tells the delegate that an incoming call has been received. To receive further events related to this call, a SINCallDelegate should be assigned to the call. The call has entered the SINCallStateInitiatingstate.Important Thread safety notes: Should be called on main thread/main GCD queue. DeclarationObjective-C - (void)client:(id<SINCallClient>)client didReceiveIncomingCall:(id<SINCall>)call;ParametersclientThe client informing the delegate that an incoming call was received. The delegate of the incoming call object should be set by the implementation of this method. callThe incoming call. 
 SINCallClientDelegate Protocol Reference
        SINCallClientDelegate Protocol Reference