兼容2018

Author: akof1314

Editor/ParticleSystemGameObjectEditor.cs

@@ -128,7 +128,7 @@ public override void OnPreviewGUI(Rect r, GUIStyle background)
             }
             else
             {
-                s_TargetIndexPropertyInfo.SetValue(baseEditor, s_TargetIndexPropertyInfo.GetValue(this));
+                SetEditorTargetIndex();
                 baseEditor.OnPreviewGUI(r, background);
             }
         }
@@ -141,7 +141,7 @@ public override void OnInteractivePreviewGUI(Rect r, GUIStyle background)
             }
             else
             {
-                s_TargetIndexPropertyInfo.SetValue(baseEditor, s_TargetIndexPropertyInfo.GetValue(this));
+                SetEditorTargetIndex();
                 baseEditor.OnInteractivePreviewGUI(r, background);
             }
         }
@@ -218,5 +218,11 @@ private bool IsPreviewCacheNotNull
                 return false;
             }
         }
+
+        private void SetEditorTargetIndex()
+        {
+            var newVal = s_TargetIndexPropertyInfo.GetValue(this, null);
+            s_TargetIndexPropertyInfo.SetValue(baseEditor, newVal, null);
+        }
     }
 }