So I understand that in order to create a universal app and make it look good on all apple devices I need to make sure that I have multiple versions of each image.
What is the best way to go about doing this?
What are the resolutions that I need to use for each device?
Do I really need a separate image for the Iphone/Iphone 4/Iphone Retina/Iphone 5/Ipad/Ipad Retina?
I have all of the images in an .ai file.
All you need to know is here:
iOS Human Interface Guidelines: Custom Icon and Image Creation Guidelines