I have a Watch OS 2 application that communicates with the iOS app via WCSession method sendMessage:replyHandler:errorHandler: The iOS application reply correctly but time to time I get the error ...

Making a connection between iOS and iWatch devices, xCode writes [WC] WCSession counterpart app not installed. After a lot of research, I've found a solution, maybe it will be helpful for someone...

I'm working on an app that share data between iPhone and Apple Watch, using WCSession method sendMessage:replyHandler:errorHandler: After implementing that method I get the error like: WCSession ...

Situation: Since our users have updated their iOS to 11 and/or WatchOS to 4, our iOS app doesn't seem to fire any scheduled timers when the app gets started by our WatchOS app. Maybe we are doing...

I've having issues synchronizing user credentials between iOS and watchOS. My basic set up is that my iOS app and watchOS app both need to talk to a backend server, and they both need an access t...

I just converted a Swift 2 app to Swift 3, using the convert function of Xcode 8. My code has a class marked as WCSessionDelegate. In Swift 2 it compiled without the methods sessionDidBecomeIna...

I have an existing iOS 9.2 and watchOS 2.1 app that uses sendMessage and transferUserInfo to send data from the iPhone to the Apple Watch. If sendMessage fails, I am using transferUserInfo to queue...

So I am using Watch Connectivity to request an array from the iPhone to the Watch. The idea was to sendMessage from the watch, and the iPhone will reply with the array within the didReceiveMessag...

When sending data using the WatchConnectivity framework, either from the phone to the watch or vice-versa, how big can the payload be before the framework gives me the WCErrorCodePayloadTooLarge er...

What is the difference between transferCurrentComplicationUserInfo and transferUserInfo? I want to send data from my AppDelegate to a clock kit complication. transferCurrentComplicationUserInfo s...

I wonder at what point one would call activateSession() on a WCSession object on the watch and on the iOS device. In the documentation it says: Always assign a delegate and activate your session ...