Turn off validateReferences for the iOS Resolver

source/ExportUnityPackage/export_unity_package.py

@@ -1851,6 +1851,10 @@ def importer_metadata(self):
       if "Android" in platforms and cpu_string != "AnyCPU":
         importer_metadata = Asset.set_cpu_for_android(
             importer_metadata, cpu_string)
+      # Set validateReferences, if requested, which should be either 0 or 1
+      validateRef = safe_dict_get_value(self._json, "validateReferences", default_value=2)
+      if validateRef == 0 or validateRef == 1:
+        importer_metadata["PluginImporter"]["validateReferences"] = validateRef
     else:
       raise ProjectConfigurationError(
           "Unknown importer type %s for package %s, paths %s" % (

source/IOSResolver/src/IOSResolver.cs

@@ -843,25 +843,41 @@ public static void SettingsDialog() {
     /// </summary>
     internal static bool MultipleXcodeTargetsSupported {
         get {
-            return typeof(UnityEditor.iOS.Xcode.PBXProject).GetMethod(
-                "GetUnityMainTargetGuid", Type.EmptyTypes) != null;
+            try {
+                return MultipleXcodeTargetsSupportedInternal();
+            } catch (Exception e) {
+                return false;
+            }
         }
     }
 
+    private static bool MultipleXcodeTargetsSupportedInternal() {
+        return typeof(UnityEditor.iOS.Xcode.PBXProject).GetMethod(
+            "GetUnityMainTargetGuid", Type.EmptyTypes) != null;
+    }
+
     /// <summary>
     /// Name of the Xcode main target generated by Unity.
     /// </summary>
     public static string XcodeMainTargetName {
         get {
-            // NOTE: Unity-iPhone is hard coded in UnityEditor.iOS.Xcode.PBXProject and will no
-            // longer be exposed via GetUnityTargetName(). It hasn't changed in many years though
-            // so we'll use this constant as a relatively safe default.
-            return MultipleXcodeTargetsSupported ? "Unity-iPhone" :
-                (string)VersionHandler.InvokeStaticMethod(typeof(UnityEditor.iOS.Xcode.PBXProject),
-                                                          "GetUnityTargetName", null);
+            try {
+                return XcodeMainTargetNameInternal();
+            } catch (Exception e) {
+                return "Unity-iPhone";
+            }
         }
     }
 
+    private static string XcodeMainTargetNameInternal() {
+        // NOTE: Unity-iPhone is hard coded in UnityEditor.iOS.Xcode.PBXProject and will no
+        // longer be exposed via GetUnityTargetName(). It hasn't changed in many years though
+        // so we'll use this constant as a relatively safe default.
+        return MultipleXcodeTargetsSupported ? "Unity-iPhone" :
+            (string)VersionHandler.InvokeStaticMethod(typeof(UnityEditor.iOS.Xcode.PBXProject),
+                                                    "GetUnityTargetName", null);
+    }
+
     /// <summary>
     /// Name of the Xcode UnityFramework target generated by Unity 2019.3+
     /// </summary>