iOS Backgrounding and Updating an Application in the Background

iOS Backgrounding with Tasks

Run tasks that don't have to die when app enters background

• Creating Background-Safe Task: You can use this pattern anywhere in your application where you don't want a task being interrupted should the user put the app into the background. A great candidate for this pattern would be tasks such as sending a new user's registration information to your server, or verifying login information. 

https://developer.xamarin.com/guides/ios/application_fundamentals/backgrounding/part_3_ios_backgrounding_techniques/ios_backgrounding_with_tasks/#background_tasks_in_ios7

Updating an Application in the Background

Update the app at regular intervals

• Region Monitoring and Significant Location Changes Service 
• Background Fetch 

https://developer.xamarin.com/guides/ios/application_fundamentals/backgrounding/part_3_ios_backgrounding_techniques/updating_an_application_in_the_background/#background_fetch

iOS Backgrounding Guidance

Refer to the following diagram to choose a backgrounding technique
https://developer.xamarin.com/guides/ios/application_fundamentals/backgrounding/part_5_ios_backgrounding_guidance/

iOs7

Multi Platform implementation (Xamarin.Form)

Using Messanger
http://arteksoftware.com/backgrounding-with-xamarin-forms/ 

More Info

• http://www.solarityllc.com/blog/the-road-to-xamarin-certification-introduction-to-backgrounding-running-finite-length-tasks-ios210
• https://spin.atomicobject.com/2016/06/15/ios-background-xamarin-part-1/
• https://spin.atomicobject.com/2016/06/16/ios-background-xamarin-part-2/
• https://krumelur.me/2015/11/25/ios-background-transfer-what-about-uploads/
• http://backstopmedia.booktype.pro/developing-an-ios-7-edge/3-update-and-running-in-the-background-michael/