iOS Question moreBackgroundTime and #PlistExtra

[Alessandro71]

referring to this code, that allows some more time when the app goes to background

[SOLVED] How to job.postString before app goes to background

Hi, I would like to send to an http server when the user has pressed the Back Button. If i send the request in the Application_Background, the app seems to be 'backgrounded' before the request has been sent. (I dont see the request on the http server ...) Is it a way to workaround ? I had...

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Sub Application_Background
   Dim nativeMe As NativeObject = Me
   nativeMe.RunMethod("moreBackgroundTime", Null)
End Sub

#If OBJC
- (void)moreBackgroundTime {
   UIApplication* app = [UIApplication sharedApplication];
   UIBackgroundTaskIdentifier bgTask = [app beginBackgroundTaskWithExpirationHandler:^{
     [app endBackgroundTask: bgTask];
   }];
}
#end if

does it need a UIBackgroundModes processing plist entry?

#PlistExtra: </array>
#PlistExtra: <key>UIBackgroundModes</key>
#PlistExtra: <array>
#PlistExtra:   <string>processing</string>
#PlistExtra: </array>

I've found it used in a project that has these plist, but I'm not sure if it's a requirement or not