iOS: limit app to 64-bit devices only

Question

According to the latest Apple WWDC, starting from ios 9 there should be a way to limit installing app only on 64 bit devices.

I searched in XCode for this option but

Answer 1

In Xcode, set the following values:

Build settings > Architectures

• Set to arm64 only. (click Other -> + and than enter arm64)

Build settings > Valid architectures

• Set to arm64 only.

Info.plist

• Set UIRequiredDeviceCapabilities to arm64 only.

The app will then not be able to run on a device that does not support 64-bit code.