[iad] Update to Xcode 9.3 beta 3 (#3576)

2018-02-22 17:10:35 -05:00 · 2018-02-22 17:10:35 -05:00 · c95557cbb4
--- a/src/iad.cs
+++ b/src/iad.cs
@ -241,7 +241,7 @@ namespace XamCore.iAd {
 		bool ShouldPresentInterstitialAd ();
 	}

-	delegate void ADConversionDetails (NSDate appPurchaseDate, NSDate iAdImpressionDate);
+	delegate void ADConversionDetails ([NullAllowed] NSDate appPurchaseDate, [NullAllowed] NSDate iAdImpressionDate);
 	
 	[Since (7,1)]
 	[BaseType (typeof (NSObject))]