在后台运行 iOS 应用

Question

我想定期将用户的当前纬度和经度发布到服务器。当应用程序在前台运行时，发布工作正常。但是如果应用程序在后台运行，有什么方法可以做到吗？

Answer 1

As far as I know you should not call any time consuming functions in applicationDidEnterBackground since the app will get suspended after a short amount of time.

From Apple's IOS Programming Guide

Most applications that enter the background state are moved to the suspended state shortly thereafter. While in this state, the application does not execute any code and may be removed from memory at any time. Applications that provide specific services to the user can request background execution time in order to provide those services.

Answer 2

Maybe this's just what you're searching for?

http://mobile.tutsplus.com/tutorials/iphone/ios-multitasking-background-location/

Answer 3

AR Body detection

if the user does the correct move then a message shows to say that the move was correct if not then a message is sent to say that you didn't complete the move