Ios App Background Fetch

In ios 7 apple has introduced another feature to allow apps to run more or less in the background background fetch.

Ios app background fetch. There is no way to force background fetches to execute at exact intervals. To support background app refresh for your app do the following. You need add uibackgroundmodes key with the fetch value in your app s info plist file info plist source contains.

Perform fetch with completion handler method in your app delegate. Email notifications on the other hand are something the user wants to be delivered in a timely fashion and push notifications are much better about doing that. Background fetch allows your app to continuously fetch data from the network when it is in the background.

In ios 7 apple added support for background fetch a kind of smart per app crontab that wakes up at opportunistic times. Call the set minimum background fetch interval method of uiapplication at launch time. Key uibackgroundmodes key array string fetch string array 2.

Enable the background fetch capability in your app. Edit your app target s scheme and you ll see an option to simulate launching from a background fetch event. Ios checks how much data and battery power was used during previous background fetches when scheduling future callbacks.

The goal of background fetch is allow apps to freshen their ui avoiding the need for the user s most frequently used apps to do a refresh cycle every time they re brought to the front. As an example consider the facebook app. Prior to background fetch you might do this by getting new data in viewwillappear.

Launch due to a background fetch event try this in the simulator.