Native linking failed, undefined Objective-C class Xamarian

Question

I'm using Xamarin Studio to build iOS app.

But I am getting this weird builds with follow error.

Error MT5211: Native linking failed, undefined Objective-C class: PayPalTouch. The symbol '_OBJC_CLASS_$_PayPalTouch' could not be found in any of the libraries or frameworks linked with your application. (MT5211)

Error MT5202: Native linking failed. Please review the build log. (MT5202)

Trying many ways following the stack overflow discussions. But still no good!

Any idea how can i fix it?

Thank you

Answer 1

I fixed similar issues by adding a [Protocol] tag before every classes in error.

https://developer.xamarin.com/guides/ios/advanced_topics/registrar/