Delphi IOS 后台运行
audio
location
voip
newsstand-content
external-accessory
bluetooth-central
bluetooth-peripheral
fetch
remote-notification
https://developer.apple.com/library/ios/documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/BackgroundExecution/BackgroundExecution.html
原文：http://www.cnblogs.com/cb168/p/5065607.html