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Xamarin.iOS project issue

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Nasir Ahmed

We have an Xamarin.Forms project.  I have updated the Xamarin.Forms and UrbanAirship  nuget packages to the latest versions. MY .NetStandard and Android  projects are compiling fine. My Xamarin iOS   project is throwing following errors: 

C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\MSBuild\Xamarin\iOS\Xamarin.iOS.Common.targets(795,3): error MT2101: Can't resolve the reference 'Foundation.NSArray Foundation.NSArray::FromNSObjects(!!0[])', referenced from the method 'System.Void UrbanAirship.UAScheduleInfoBuilder::set_Triggers(UrbanAirship.UAScheduleTrigger[])' in 'Xamarin.iOS, Version=0.0.0.0, Culture=neutral, PublicKeyToken=84e04ff9cfb79065'.
2> --- inner exception


 Mono.Linker.MarkException: Error processing method: 'System.Void UrbanAirship.UAScheduleInfoBuilder::set_Triggers(UrbanAirship.UAScheduleTrigger[])' in assembly: 'AirshipBindings.dll' ---> Mono.Cecil.ResolutionException: Failed to resolve Foundation.NSArray Foundation.NSArray::FromNSObjects(!!0[])

 

 

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  • Avatar
    Chilun Liu

    Hello Nasir,

    May I ask if you can return the following information in order for me to troubleshoot the problem?

    - The version of Xamarin.iOS you have installed (I would recommend updating to the latest if you haven't already done so).
    - The version of the Airship SDK you are using
    - A screenshot of your Project list/solution explorer so I can see which packages are installed and where
     
    Kind regards,
    Chilun Liu
    Senior Technical Support Engineer
    Airship
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  • Avatar
    Nasir Ahmed

    Thanks.

     

    Here are the info you needed:

     

    1- Xamarin.forms version 4.2.0709249

    2- Airship versions are as below

     

    - .netstandard is installed in all projects.

    - other nugetpackage are installed in relevant projects. 

    3- solution explorer. I am not sure though what view you are looking for. 

     
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  • Avatar
    Chilun Liu

    Hi Nasir,

    Can you install the urbanairship.portable package through NuGet as well?

     

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  • Avatar
    Chilun Liu

    Hi Nasir,

    Can you install the urbanairship.portable package through NuGet as well?

     

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  • Avatar
    Nasir Ahmed

    It didn't make any difference.

     

    I have installed urbanairship.portable in all three projects, cleaned the solution and build did give the same error for IOS project. 

     

    Severity Code Description Project File Line Suppression State
    Error Can't resolve the reference 'Foundation.NSArray Foundation.NSArray::FromNSObjects(!!0[])', referenced from the method 'System.Void UrbanAirship.UAScheduleInfoBuilder::set_Triggers(UrbanAirship.UAScheduleTrigger[])' in 'Xamarin.iOS, Version=0.0.0.0, Culture=neutral, PublicKeyToken=84e04ff9cfb79065'. Healthbit.iOS

     
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  • Avatar
    Chilun Liu

    May I ask if you can email support@airship.com with this information as well as providing your App Key?

    Here is a link to some instructions on finding your App Key - https://support.airship.com/hc/en-us/articles/213491663-How-do-I-find-my-App-Key-or-App-Secret-

     

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