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iOS 4 in Action: Developing iPhone and iPad Apps by Shannon Appelcline, Christopher Allen, Brandon Trebitowski, Jocelyn Harrington

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Appendix D. Updating current applications for the iPad

Developing for the iPad is nearly identical as developing for the iPhone, so you should almost always release a version of your application for both. iPad users can always run your iPhone application in 2x mode (which stretches your iPhone application to fit the dimensions of the iPad screen), but this makes for an overall poor experience.

In a development document[1] called “Introducing Universal Application for iPhone OS”, Apple provides a clear and concise document for creating your application for both the iPhone and the iPad. Rather than restating that document, we felt it would be more beneficial to walk you through how to update an iPhone app to support the iPad in converting an ...

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