Application 32-bit and 64-bit

How can the detect 32-bit and 64-bit systems, it is said that only after the use of 64-bit 10.3, then the application to change how to detect can be used in 10.3 after the version?

Replies

I’m sorry but I’m unable to parse your question. Below is some specific details about the iOS 11 change:

  • iOS 11 will only run on 64-bit hardware. The official list of supported hardware is published on the iOS 11 Preview page (scroll all the way to the bottom).

  • If you set your app’s deployment target to iOS 11 or later, Xcode will build a 64-bit only version of your app.

  • If app supports older releases of iOS Xcode will create a universal app. The 64-bit build will run on 64-bit hardware and the 32-bit build will run on 32-bit hardware.

  • In general this means you don’t need to test for 64- or 32-bit support. The OS always runs the right build of your app automatically.

If the above doesn’t address your question, please follow-up with information about what’s missing.

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Quinn “The Eskimo!”
Apple Developer Relations, Developer Technical Support, Core OS/Hardware

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