how to run code logic in the background in swift

Asked Feb 09 '17 at 20:06

Active Feb 09 '17 at 20:23

Viewed 223 times

I am new to swift. Here is the following thing I am trying.

Track the location and motion status of the user in the background. When user's motion status goes from walking to running I want to track the location. And when the app comes to foreground I want to pin the tracked location where the user started running from walking.

It works fine when the app is in foreground entire time. But it does not work when the app is in background.

How shall I implement the code for the logic to be executed in the background?

Location service in the background:

edited Feb 09 '17 at 20:23

asked Feb 09 '17 at 20:06

Subhransu Mishra

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What kind of location permissions have you requested, _When In Use_ or _Always_? – eshirima Feb 09 '17 at 20:11
@EmilDavid Always – Subhransu Mishra Feb 09 '17 at 20:13
Have you turned on location updates in Background mode? – eshirima Feb 09 '17 at 20:14
Yes location update in background is on. – Subhransu Mishra Feb 09 '17 at 20:24
Then I'd recommend in your _AppDelegate_ inside the `applicationDidEnterBackground` method, to start a background thread to run your logic on. This [answer](http://stackoverflow.com/a/6653110/4962554) explains a similar issue and this [answer](http://stackoverflow.com/a/25070476/4962554) is a good intro for Swift threading. – eshirima Feb 09 '17 at 20:43
Make sure the Background fetch is turned on as well in your app capabilities – eshirima Feb 09 '17 at 20:48

how to run code logic in the background in swift

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