0

I am trying to get an existing Xamarin native iOS app using MvvmCross to build and deploy but it crashes on every startup with 

+ "[MSAppDelegateForwarder addAppDelegateSelectorToSwizzle:]: unrecognized selector sent to class"

Searching around on "MSAppDelegateForwarder addAppDelegateSelectorToSwizzle" I see a lot of references to the Microsoft App Center project. I have disabled App Center in the app and uninstalled the packages but am still getting this error.

I have also discovered that I am getting this error logged on build 

Class MSService is implemented in both /System/Library/PrivateFrameworks/MailServices.framework/MailServices (0x2718caf70) and /var/containers/Bundle/Application/3FDD6329-9949-4E57-8CA1-7E295EABC7F0/(MyApp).iOS.app/(MyApp).iOS (0x106c54118). One of the two will be used. Which one is undefined.

I have cleaned, rebuilt, deleted bin and obj files, deleted the packages file and even removed and reinstalled Visual Studio Mac. I am not sure where to go from here. Has anyone run into this exception before?

Sev
  • 883
  • 1
  • 14
  • 34
  • Can you try disabling swizzling in AppCenter? https://learn.microsoft.com/en-us/appcenter/sdk/distribute/xamarin#disable-automatic-forwarding-of-application-delegates-methods-to-app-center-services and https://learn.microsoft.com/en-us/appcenter/sdk/push/xamarin-ios#disable-automatic-method-forwarding-to-app-center-services. What AppCenter modules are used? – Guillaume Perrot Jul 29 '19 at 20:56
  • your second question (about class being implemented in two files) is "solved" in this question: https://stackoverflow.com/questions/30581884/class-is-implemented-in-both-one-of-the-two-will-be-used – Misiakw Jul 30 '19 at 09:49
  • Great suggestion on disabling swizzling, however that did not work. – Sev Jul 30 '19 at 13:23

0 Answers0