bug修复

README.md

@@ -16,6 +16,8 @@ AppStorageHelper.save(StorageKeys.CLIENT_ID, d)
         
   // 获取存储的strign数据
 let d = AppStorageHelper.get(StorageKeys.CLIENT_ID)
+// 删除指定存储
+AppStorageHelper.delete(StorageKeys.CLIENT_ID)
 ```
 
 ### 1.2.[PreferencesHelper](./src/main/ets/utils/PreferencesHelper.ets)
@@ -31,6 +33,10 @@ PreferencesHelper.put(StorageKeys.CLIENT_ID, value)
   // 获取存储的数据
 PreferencesHelper.get(StorageKeys.CLIENT_ID).then(res => {
   console.log('>>>>>', res)
+})
+  // 删除存储的数据
+PreferencesHelper.delete(StorageKeys.CLIENT_ID).then(() => {
+  console.log('>>>>>')
 })
 ```