Geolocation + iOS + background mode = Fail

cordova
1

Hi guys can you save me from the project’s cliff.

Background:

I have a Ionic project based on Map template. What it does is tracking the walking route of user and draw it to google map.

Problem appears on iOS devices with background running. I cannot get the GPS data correctly.
FYI: BackgroundMode plugin installed and set up.

Scenario 1: Use cordova-plugin-geolocation plugin

It does not work. No GPS data collected when turning off screen.

Scenario 2: Use plain JS with navigator.geolocation.getCurrentPosition

It works. GPS data collected but not correct. Data is somehow duplicated (!!) from previous ones. Thing get back to normal when I open
the app again.

Any idea would help.

Plugins used:
cordova-plugin-background-mode 0.6.5
cordova-plugin-customurlscheme 4.1.5
cordova-plugin-device 1.1.1
cordova-plugin-geolocation 2.1.0
cordova-plugin-splashscreen 3.2.1
cordova-plugin-statusbar 2.1.2
cordova-plugin-whitelist 1.2.1
ionic-plugin-keyboard 2.0.1

Edited:
Target platform?
iOS 7+, and Android 4.1+ as required by Ionic.

Test device iOS version?
iOS 9 on iPhone 5

Have you tested your App in the foreground?
Yes I do. To clarify, here is more detailed test:

I have two test functions: One array for gps collecting and one counter for background mode checking. Both are running under interval set.

(on iOS)
Foreground:
Counter works, number is increased.
GPS works, data is added to array.

Background:
Counter works, number is increased.
GPS not works, data is either not collected (with ngCordova geolocation plugin) or is oddly duplicated with JS navigator.geolocation

2

i was only in contact with this:

I was not part as a developer only as someone outstanding with a little eye on the ionic development. but they used this plugin for tracking of shippings around the world… so i think this should also work in background mode. but it costs.

You have to fulfill strict standards to be allowed to handle background tasks on iOS! So i think the most of the plugins does not fullfil the requirements.

greets.