I can't getting token value by this getToken() method in iOS devices when app is kill

[vijaySlk]

1. getToken() call after login
2. when my ios app kill then i have getting token null value and if not kill app and login - logout multiple times then i have getting token value
3. ios devices version for testing 12.4
4. plugin and npm
   • cordova-plugin-fcm-with-dependecy-updated": "^6.4.3
   • @ionic-native/fcm": "^5.27.0

5. below my code

   this.fcm.hasPermission().then(hasPermission => {
   console.log('hasPermission_token...', hasPermission);
   
   if (hasPermission) {
       console.log("Has permission for fcm token!");
       setTimeout(() => {
           this.fcm.getToken().then(token => {
               console.log('this is fcm new token', token);
               ///call api save fcm to backend
               this.FCMTokenSave(token, loginUserDetail);
   
           }).catch(err => {
               console.log('fcmtoken_err1', err);
   
           });
       }, 500);
   
       this.fcm.onTokenRefresh().subscribe(token => {
           console.log('this is fcm refresh token', token);
           ///call api save fcm to backend
           this.FCMTokenSave(token, loginUserDetail);
       });
   } else {
       this.toasthelper.presentToast('Please give permission for Notification');
       const w: any = window;
       w.FCMPlugin.requestPushPermissionIOS(() => {
           console.log('push permissions success');
   
           setTimeout(() => {
               this.fcm.getToken().then(token => {
                   console.log('this is fcm new token', token);
                   ///call api save fcm to backend
                   this.FCMTokenSave(token, loginUserDetail);
   
               }).catch(err => {
                   console.log('fcmtoken_err2', err);
   
               });
           }, 500);
           this.fcm.onTokenRefresh().subscribe(token => {
               console.log('this is fcm refresh token', token);
               ///call api save fcm to backend
               this.FCMTokenSaveRefresh(token, loginUserDetail);
           });
       }, (e) => {
           console.log('push permissions fail', e);
           this.toasthelper.presentToast(e.message);
       });
   }
   }).catch(err => {
   console.log('hasPermission_err...', err);
   })

[andrehtissot]

Hi @vijaySlk.

Would you explain what do you mean by "app kill"?

If the app is killed, it means that is not running, right?

[vijaySlk]

app kill means app not running is right but after kill again app open then token value getting null

[andrehtissot]

It makes sense. Because, this token is provided by the SDK, so if it is not yet re-fetched, the value would be null. Would you try something like this:

const getValidToken = () => new Promise((resolve, reject) => {
    const success = (token: string) => {
        if(!token) { return }
        this.fcm.onTokenRefresh().unsubscribe(success);
        resolve(token);
    }
    this.fcm.getToken().then(success).catch(reject);
    this.fcm.onTokenRefresh().subscribe(success);
})

Then calling getValidToken, would not resolve until a non-null value is retrieved.

[vijaySlk]

now i have find one solution remove below plugin ionic cordova plugin add cordova-plugin-firebase-crashlytics npm install @ionic-native/firebase-crashlytics

this plugin conflict to FCM

[andrehtissot]

@vijaySlk Conflicts are never good. Would you share which version you had installed? Just keep a note and check later.

[UsamaParkar]

Hi

@vijaySlk Conflicts are never good. Would you share which version you had installed? Just keep a note and check later.

Hi, I'm experiencing a similar issue where the token is sometimes null, on IOS. I believe your solution regarding promise resolve and reject could be the answer, but I want to under the steps inside the code, since I have some additional steps of my own. I would really appreciate it, if you would help me out with this.

[andrehtissot]

@UsamaParkar I didn't understand what you meant by I want to under the steps inside the code, since I have some additional steps of my own.