Determine if iOS device is 32- or 64-bit

Question

Does anyone know of an easy way to tell if an iOS7 device has 32- or 64-bit hardware? I don\'t mean programmatically, I just mean via settings, model number, 3rd-party app,

Answer 1

If you are compiling with clang, there is another way: just check if __arm__ or __arm64__ is defined.

The example code below is not tested but it should illustrate what I mean by that:

#if defined(__arm__)
    NSLog(@"32-bit App");
#elif defined(__arm64__)
    NSLog(@"64-bit App");
#else
    NSLog(@"Not running ARM");
#endif

Note that this relies on the fact that current iOS application binaries contain both, 32bit and 64bit binaries in a single container and they will be correctly selected depending on whether your app supports executing 64bit.