null is not an object (evaluating 'app.keyWindow.rootViewController')

[bradseefeld]

Your Environment

• Plugin version: 1.9.0-beta3
• Platform: iOS
• OS version: 11.4
• Device manufacturer / model: iPhone 6
• Nativescript version (tns info):

  ⚠ Update available for component nativescript. Your current version is 4.1.0 and the latest available version is 4.1.2.
  ⚠ Update available for component tns-core-modules. Your current version is 4.1.0 and the latest available version is 4.1.1.
  ✔ Component tns-android has 4.1.3 version and is up to date.
  ✔ Component tns-ios has 4.1.1 version and is up to date.

• Plugin config

  BackgroundGeolocation.ready({
    reset: true,
    desiredAccuracy: 0,
    distanceFilter: 5,
    desiredOdometerAccuracy: 10
  });

  Expected Behavior

  Starts tracking on iOS

Actual Behavior

Does not track. Instead the .ready call results in the .catch being triggered. The error is

null is not an object (evaluating 'app.keyWindow.rootViewController')
CONSOLE LOG file:///app/tns_modules/log4ts/build/appenders/ConsoleAppender.js:14:20: 2018-07-20 08:35:51 WARN [Tracker] - getAdapter@file:///app/tns_modules/nativescript-background-geolocation-lt/api.js:552:56
file:///app/tns_modules/nativescript-background-geolocation-lt/api.js:154:51
ZoneAwarePromise@file:///app/tns_modules/nativescript-angular/zone-js/dist/zone-nativescript.js:777:37
ready@file:///app/tns_modules/nativescript-background-geolocation-lt/api.js:145:27
init@file:///app/tracking/tracker.js:31:77
LocationService@file:///app/tracking/services/location.service.js:8:21
_createClass@file:///app/tns_modules/@angular/core/bundles/core.umd.js:10925:28
_createProviderInstance$1@file:///app/tns_modules/@angular/core/bundles/core.umd.js:10899:38
initNgModule@file:///app/tns_modules/@angular/core/bundles/core.umd.js:10852:53
NgModuleRef_@file:///app/tns_modules/@angular/core/bundles/core.umd.js:12107:21
createNgModuleRef@file:///app/tns_modules/@angular/core/bundles/core.umd.js:12096:28

Steps to Reproduce

1. Use config above on iOS
2. Run app in iOS emulator.

Context

Debug logs

I attempt to call getLogs in my catch, but this returns no log data.

[bradseefeld]

This happens if you call BackgroundGeolocation.ready() prior to init'ing your app component (in angular). This was easy for us to do since we were calling .ready in a constructor of something that was being injected into the app component. Strangely, this works fine on android, but fails on iOS. Delaying the .ready call fixes the issue.