title: How to find out if DropBox app folder exists on iOS
body: <p>I am using DropboxSDK in my app. In that am using kDBRootAppFolder so if am using it first time it will create folder with app name. So i want to find if the folder exists or not how can i? is there any method exists in that? if any one have idea please let me know.</p>
  
  <p>Actually am getting Warning like this:</p>
  
  <blockquote>
    <p>[WARNING] DropboxSDK: error making request to /1/metadata/sandbox - Token is disabled or invalid while trying to loadData  using :[[self dbClient] loadMetadata:@"/"]; statement.</p>
  </blockquote>