Receive Watch OS message on iOS device - ios

Question

Hi everyone and thanks for your support in advance,
I just started working with Watch OS 2 and Objective-C and I am trying to send a message to an iPhone device when a button is tapped, I don't know if the next approach is the best but from Apple docs it seems to best feet my needs, as I need to send a request to and paired iOS device and receive some user info, I also read that this only works if the app in in foreground witch is a downside :(
Update 1
- (IBAction)didTappedButton {
WCSession *session = [WCSession defaultSession];
session.delegate = self;
[session activateSession];
if ([session isReachable] == YES) {
NSDictionary *postDictionarry = [[NSDictionary alloc] initWithObjects:[NSArray arrayWithObject:#"retrieveAPISessionKey"] forKeys:[NSArray arrayWithObject:#"request"]];
[self.button setBackgroundColor:[UIColor blueColor]];
[session sendMessage:postDictionarry
replyHandler:^(NSDictionary<NSString *,id> * _Nonnull replyMessage) {
[self postToServer];
}
errorHandler:^(NSError * _Nonnull error) {
[self.button setBackgroundColor:[UIColor redColor]];
[self showAlertViewwithTitle:#"Oops..." andMessage:#"Something went Wrong"];
}];
}else{
[self showAlertViewwithTitle:#"Oops..." andMessage:#"Please pair with a device"];
}
}
And in the AppDelegate of I implemeted the next code in .h:
#import WatchConnectivity;
#interface AppDelegate : UIResponder <UIApplicationDelegate, UIGestureRecognizerDelegate, WCSessionDelegate>
and in the .m:
- (void)session:(nonnull WCSession *)session
didReceiveMessage:(NSDictionary<NSString *,id> *)message
replyHandler:(void(^)(NSDictionary<NSString *,id> *))replyHandler {
NSString *action = message[#"request"];
NSString *actionPerformed;
// more code here...
}
note I am testing on the simulator and have an issues in getting tap gestures and also I see a lot of spinners on the watch simulator
Update 2
- (void)awakeWithContext:(id)context {
[super awakeWithContext:context];
// Configure interface objects here.
WCSession *session = [WCSession defaultSession];
session.delegate = self;
[session activateSession];
}
- (IBAction)didTappedButton {
if ([[WCSession defaultSession] isReachable] == YES) {
NSDictionary *postDictionarry = [[NSDictionary alloc] initWithObjects:[NSArray arrayWithObject:#"retrieveAPISessionKey"] forKeys:[NSArray arrayWithObject:#"request"]];
[self.button setBackgroundColor:[UIColor blueColor]];
[[WCSession defaultSession] sendMessage:postDictionarry
replyHandler:^(NSDictionary<NSString *,id> * _Nonnull replyMessage) {
[self postData];
}
errorHandler:^(NSError * _Nonnull error) {
[self.button setBackgroundColor:[UIColor redColor]];
[self showAlertViewwithTitle:#"Oops..." andMessage:#"Something went Wrong"];
}];
}else{
[self showAlertViewwithTitle:#"Oops..." andMessage:#"Please pair with a device"];
}
}
- (void)postData{
//post stress signal to server
}
- (void)showAlertViewwithTitle:(NSString *)title andMessage:(NSString *)message{
WKAlertAction *act = [WKAlertAction actionWithTitle:#"OK" style:WKAlertActionStyleCancel handler:^(void){}];
NSArray *actions = #[act];
[self presentAlertControllerWithTitle:title message:message preferredStyle:WKAlertControllerStyleAlert actions:actions];
}
So, just succeede in sending the message and also pair devices but now i don't receive the sent dictionary in the iOS app.

Answer 1

You need to activate your WCSession in both the WatchKit App Extension and in the iPhone application. Based on the code you've shown us, it does not appear you are activating it in your iPhone application.
Add the following to your iPhone application:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
if ([WCSession isSupported]) {
WCSession* session = [WCSession defaultSession];
session.delegate = self;
[session activateSession];
}
...
You should then be able to receive the message via your existing session:didReceiveMessage:replyHandler: method.