起動画面設定機能を追加：6.0以降の変更点のメモを追加

MenuPage.js

@@ -21,6 +21,16 @@ export function MenuPage() {
   const { getCurrentTrain } = useCurrentTrain();
   const navigation = useNavigation();
   const { addListener } = navigation;
+  useEffect(() => {
+    AS.getItem("startPage")
+      .then((res) => {
+        if (res == "true") navigation.navigate("login");
+      })
+      .catch((e) => {
+        //6.0以降false
+        AS.setItem("startPage", "true");
+      });
+  }, []);
   useEffect(() => {
     const unsubscribe = addListener("tabPress", (e) => {
       AS.getItem("favoriteStation")
@@ -70,11 +80,7 @@ export function MenuPage() {
         options={{ ...optionData, gestureEnabled: false }}
         component={AllTrainDiagramView}
       />
-      <Stack.Screen
-        name="howto"
-        options={optionData}
-        component={HowTo}
-      />
+      <Stack.Screen name="howto" options={optionData} component={HowTo} />
     </Stack.Navigator>
   );
 }