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Learning iOS Development: A Hands-on Guide to the Fundamentals of iOS Programming by Erica Sadun, Rod Strougo, Maurice Sharp

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iOS

One obvious difference is the version of iOS running on any given device. iOS device users are quick to upgrade to new releases. It took comparatively little time for most devices to upgrade from iOS 3 to 4, then 4 to 5, and 5 to 6. Although there are some models that cannot upgrade to iOS 7, they make up a rapidly shrinking percentage of the total number of units.

There are definitely differences in functionality between various versions of the OS. For example, in addition to the new look, iOS 7 introduces UI Motion, UI Dynamics, and Text Kit. All three offer ways to increase engagement with your user. Usually it is a decision of supporting the current version plus the one before—in this case, iOS 6 and 7. It is fairly easy to test for the ...

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