In Xcode 9, the standard CPU architectures setting is for 64-bit only, which doesn't work on 32-bit devices.
That’s only true if the deployment target is iOS 11 or later. If the deployment target is set to anything lower, the Standard setting builds both 32- and 64-bit versions (modulo the Build Active Architecture Only (
ONLY_ACTIVE_ARCH
) build setting).
I suspect that HelloYangZai’s problem is the opposite, that they’re building a 32-bit app and trying to run it on iOS 11. I explained that on the thread they created for this issue.
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