PerformFetch is never called

Question

I'm trying to implement background fetch in xamarin.ios application, inspite of enabling background fetch, It is never getting called.

public override bool FinishedLaunching (UIApplication app, NSDictionary options)
{
   // tried this also 
   // UIApplication.SharedApplication.SetMinimumBackgroundFetchInterval(UIApplication.BackgroundFetchIntervalMinimum);

   UIApplication.SharedApplication.SetMinimumBackgroundFetchInterval(60);

   // Other code
}


public override async void PerformFetch(UIApplication application, Action<UIBackgroundFetchResult> completionHandler)
{          
    Console.WriteLine("Perform fetch called..!!");
    var result = await FetchImage("https://www.xamarin.com/content/images/pages/branding/assets/xamagon.png");

    completionHandler(result);
}

Answer 1

Did you you request the right permissions in your info.plist?

You set your minimum background fetchinterval to 60, while its suggested not to go under 900.

I would suggest to take a look at this xamarin blogpost about performing Background data fetches . It is detailed and nicely explained.