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Hello I am Develop the ios6 supporting application.My thought is ios 6 developed application is compitaple on ios7 or any otherway is available? and also If I developing the application using ios 7 is supporting earlier versions.Give the best solution for me.

Ben10
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An app compiled for iOS 6 runs in a special compatibility mode on iOS 7.

When you compile with Xcode 5 you must support at least iOS 7. By setting the "Deployment Target" you can also support older versions, but if you use features that are only available in iOS 7 you need to check first otherwise your app will crash on iOS 6.

Also note that the various UI components on iOS 7 are different sizes than on iOS 6. You need to cater for that either using Interface Builder (autolayout possibly) or in your code. How to do this is detailed in the iOS 7 Transition Guide.

The easiest solution is to only support iOS 7. The best option depends entirely on your circumstances, customer base, etc.

Stephen Darlington
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