如何知道当前的架构是 i386 还是 x86_64 在 macs 中？(Xcode)
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how to know if current architecture is i386 or x86_64 in macs? (Xcode)
提问by nacho4d
I am handling a camera that needs different parameters in different architecture, Is there a flag that I can check to see if I am in 32bits or 64bits in my mac? I was trying this but does not seem to work, I always get 32Bits!! :
我正在处理需要不同架构中不同参数的相机，是否有一个标志可以检查我的 Mac 是 32 位还是 64 位？我正在尝试这个，但似乎不起作用，我总是得到 32Bits！！：
#if defined(PER_ARCH_CFLAGS_x86_64)
NSLog(@"64bit!!");
#else
NSLog(@"32Bits!!");
#endif
回答by
#ifdef __x86_64__
//64-bit intel
#endif
#ifdef __i386__
//32-bit intel
#endif
//carry on for ppc, ppc64, ARM
or...
或者...
#ifdef __LP64__
//64-bit Intel or PPC
#else
//32-bit Intel, PPC or ARM
#endif
回答by swegi
#ifdef __LP64__
// 64-bit code
#else
// 32-bit code
#endif
来源：http: //developer.apple.com/mac/library/documentation/Darwin/Conceptual/64bitPorting/MakingCode64-BitClean/MakingCode64-BitClean.html#//apple_ref/doc/uid/TP40001064-CH226-SW2
