Specifying supported platforms

pubspec.yaml

@@ -24,7 +24,11 @@ flutter:
   # be modified. They are used by the tooling to maintain consistency when
   # adding or updating assets for this project.
   plugin:
-    androidPackage: com.jarvan.fluwx
+    platforms:
+      android:
+        package: com.jarvan.fluwx
+        pluginClass: FluwxPlugin
+      ios:
         pluginClass: FluwxPlugin
 
   # To add assets to your plugin package, add an assets section, like this: