unsigned int 0～4294967295 int -2147483648～2147483647 unsigned long 和int一樣long 和int一樣long long的最大值：9223372036854775807long long的最小值：-9223372036854775808unsigned long long的最大值：1844674407370955161__int64的最大值：9223372036854775807__int64的最小值：-9223372036854775808unsigned __int64的最大值：18446744073709551615

unsigned int 0～4294967295 int -2147483648～2147483647 unsigned long 和 unsigned long long一樣long 和long long一樣long long的最大值：9223372036854775807long long的最小值：-9223372036854775808unsigned long long的最大值：1844674407370955161__int64的最大值：9223372036854775807__int64的最小值：-9223372036854775808unsigned __int64的最大值：18446744073709551615

#ifndef _OBJC_NSOBJCRUNTIME_H_#define _OBJC_NSOBJCRUNTIME_H_#include <TargetConditionals.h>#include <objc/objc.h>#if __LP64__ || (TARGET_OS_EMBEDDED && !TARGET_OS_IPHONE) || TARGET_OS_WIN32 || NS_BUILD_32_LIKE_64typedef long NSInteger;typedef unsigned long NSUInteger;//64bit下NSInteger的取值范圍就是long==long long#elsetypedef int NSInteger;typedef unsigned int NSUInteger;//32bit下NSInteger的取值范圍就是int==long#endif#define NSIntegerMax  LONG_MAX#define NSIntegerMin  LONG_MIN#define NSUIntegerMax  ULONG_MAX#define NSINTEGER_DEFINED 1#endif