ios - Passing an image from iPhone to Apple Watch not working -

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most tutorials on passing image talk existing images. attempting generate images @ runtime on iphone , pass apple watch.

i using mmwormhole referenced so question didn't images through.

i've tried using + openparentapplication on wkinterfacecontroller directly. error:

property list invalid format: 200 (property lists cannot contain null)

i , see uiimage cannot serialized. try convert uiimage > nsdata > nsstring , send

- (void)awakewithcontext:(id)context {     [super awakewithcontext:context];     self.timer = [nstimer scheduledtimerwithtimeinterval:0.1 target:self selector:@selector(loop) userinfo:nil repeats:true]; };   - (void)loop {     [wkinterfacecontroller openparentapplication:nil reply:^(nsdictionary *replyinfo, nserror *error) {         nsdata *m = replyinfo[@"image"];         uiimage *img = [uiimage imagewithdata:m];         [self.image setimage:img];     }]; //    [self.wormhole passmessageobject:@"hello" identifier:@"hello"]; }    appdelegate     - (void)application:(uiapplication *)application handlewatchkitextensionrequest:(nsdictionary *)userinfo reply:(void (^)(nsdictionary *))reply {         uiimage *image = [uiimage imagenamed:@"cat.png"];         nsdata *data = uiimagepngrepresentation(image);         nsdictionary *d = @{@"image" : data};         reply(d);     }

you need specify app group id on both ends. like:

mmwormhole *wormhole = [[mmwormhole alloc] initwithapplicationgroupidentifier:appgroupid optionaldirectory:kwormholedirectory];

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