1) Open Twitter Demo
2) Target to iOS Simulator (for example)
3) Complete Key and Secret (taken from the VCL app to work well)
4) Run
5) Press Connect button, and this message appears in safari window:
Whoa there!The request token for this page is invalid. It may have already been used, or expired because it is too old.Please go back to the site or application that sent you here and try agaian; it was probably jist a mistake.
Here the correct message link:
https://www.dropbox.com/s/ja2kgzc6h5yek35/Twitter.png?raw=1