ofxUI & multiple iOS devices & reorientation ?

I’d have another need/request.
I need to design my UI for iPhone, iPhone retina, iPad.

1/ Size / places
Would the best way be to have conditional code and make 3 differents UI ?

2/ Reorientation
How can I deal with reorientation ?
Should I create also 2 differents (other) GUI for each orientation + conditional code to make a rotation of the whole stuff (including GUI of course) ?

Let me know what would be your best practices :slight_smile: