What is the actaully value of a UIApplicationBackgroundFetchIntervalMinimum?

Question

I want to customize the background selection for an iOS app.

I do:

func application( application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]? ) -> Bool { ... application.setMinimumBackgroundFetchInterval( UIApplicationBackgroundFetchIntervalMinimum) ... 

if I check and print UIApplicationBackgroundFetchIntervalMinimum in the debugger, it says 0 - what is the value really?

I tried looking at the api but no luck https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIApplication_Class/#//apple_ref/occ/instm/UIApplication/setMinimumBackgroundFetchInterval :

Answer 1

Apple did not indicate how long UIApplicationBackgroundFetchIntervalMinimum , however in practice it is about 10 minutes.