iPhone + iPad app development

Question

Can anyone shed some light on how I should go about developing a single app that will work for both iphones and iPads? One natural problem is the screen resolution.

Am I supposed to start a project with iPad size and dynamically cater it to work on iPhone size too, or am I supposed to start 2 projects, 1 for each?

You know in the app store, if there's an app for both iPad and iPhone, there's this little + icon on the app. In our Adobe AIR -> iOS workflow, how should we achieve that? Any help is appreciated. Thanks!

Lars Laborious · Answer

If you want a universal app and you use Flash to compile, you could just choose "iPhone and iPad" as Device in the AIR for IOS Settings.

There are many ways to tackle the screen resolution, and as you suggest - starting with iPad size, is a good choice. Then, in the settings, choose Full screen and Auto orientation. Now you can just fill in graphics outside the stage area (this will be visible for iPhones). And preferably you would move some elements (such as menu buttons) according to the current device's resolution.

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