iOS/watchos2 - Why doesn't session:didReceiveApplicationContext: fire? -

i have read q/a below, , it's great. i'm doing in test project, , works fine.

i've created real project, in watch extension, session: didreceiveapplicationcontext: not fire.

here send code:

-(void)sendplisttowatch:(nsmutabledictionary *)dictionary {     nslog(@"%s", __function__);     if ([wcsession defaultsession]) {         nsdictionary *applicationdict = @{@"favorites.plist":dictionary};         [[wcsession defaultsession] updateapplicationcontext:applicationdict error:nil];          nslog(@"sent dictionary");     } else {         nslog(@"not paired");     } } 

and receive code on watch:

- (void)awakewithcontext:(id)context {     [super awakewithcontext:context];      if ([wcsession issupported]) {         [self.session activatesession];         self.session = [wcsession defaultsession];         self.session.delegate = self;     } }  - (void)willactivate {     [super willactivate]; }  - (void)diddeactivate {     [super diddeactivate]; }    - (void)session:(nonnull wcsession *)session didreceiveapplicationcontext:(nonnull nsdictionary<nsstring *,id> *)applicationcontext {     nsstring *string = [applicationcontext objectforkey:@"dictionary"];      nsmutabledictionary *dictionary = [applicationcontext objectforkey:@"dictionary"];      dispatch_async(dispatch_get_main_queue(), ^{         nslog (@"applicationcontext: %@", applicationcontext);     });  } 

send messages between ios , watchos watchconnectivity in watchos2

i've watched wwdc connectivity session, , find this site helpful.

any ideas (perhaps it's not code, missing or incorrect plist setting?)

i've run similar issue (ios 9.3, watchos 2.2) session: didreceiveapplicationcontext: delegate method wouldn't fire when expected. appears there's undocumented behavior whereby if dictionary matches previous value sent, call updateapplicationcontext() fails silently, neither sending dictionary nor throwing error (see https://forums.developer.apple.com/thread/46107).

the solution offered in thread add nsuuid().uuidstring every dictionary while testing. worked me.