如何在 Xamarin.iOS 中使用#available / @available

Question

I need to check for API availability in Xamarin.iOS - in Objective-C or Swift i could use these calls:

if (@available(iOS 13, *))

或者

if #available(iOS 13, *)

什么是available关键字的Xamarin.iOS等效项 - 我在 Xamarin ZDB974A63908Z ZDB974238714CAACEDED604 浏览器中找不到任何文档。

Answer 1

The @available mechanism was added to the clang compiler for Objective C with Xcode 9. It is modelled on the Swift #available syntax.And it is unavailable in Xamarin.iOS. 您可以使用以下代码

if (UIDevice.CurrentDevice.CheckSystemVersion(13,0))
{
    //...           
}
else
{
   //...
}