WCSession: is it possible to cancel queued message?

Question

Is there any way to cancel messages sent by the sendMessage(_:replyHandler:errorHandler:) method of WCSession ?

From the documentation :

Messages are queued serially and delivered in the order in which you sent them.

Answer 1

No. That type of transfer is not cancellable, as

• the OS would have immediately sent any sendMessage data to a reachable counterpart

  Use the [sendMessage] method to transfer data to a reachable counterpart. These methods are intended for immediate communication between your iOS app and WatchKit extension.

  Data sent using the [sendMessage], and transferCurrentComplicationUserInfo: methods has a higher priority and is transmitted right away .

• the OS provides no mechanism to specifically cancel a message

  The only WCSession objects that have a cancel method are WCSessionUserInfoTransfer , and WCSessionFileTransfer , since lower-priority transferUserInfo or transferFile data is not sent immediately, but at an optimum time determined by the OS.