Add slider and save value in LocalStorage

local-storage/index.js

@@ -0,0 +1,11 @@
+import { AsyncStorage } from 'react-native'
+
+export async function getTempScale() {
+  const result = await AsyncStorage.getItem('tempScale')
+  if (!result) return result
+  return JSON.parse(result)
+}
+
+export async function saveTempScale(scale) {
+  return AsyncStorage.setItem('tempScale', JSON.stringify(scale))
+}