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iOS 10 introduced the fadeDuration selector to AVAudioplayer.SetVolume.
This works in Xamarin but when compiled om iOS 9 it sends the selector fadeDuration which is not available. Resulting in a "invalid selector send to instance".
> This works in Xamarin but when compiled om iOS 9 it sends the selector fadeDuration
> which is not available. Resulting in a "invalid selector send to instance".
This is correct, since the selector is only available on iOS 10 and you should be using it only if you are running iOS 10, you can conditionally use API based on the iOS version you are running as documented here https://developer.xamarin.com/recipes/ios/general/projects/environment_checks/#Check_the_iOS_Version
Also you might want to try to set the Volume property instead of using the SetVolume method if iOS < 10
Hope this helps.
Ah great thanks.
I missed the volume option for iOS 9 and below.