NSInteger versus int [duplicate]

问题:

This question already has an answer here:

• When to use NSInteger vs. int 8 answers

What would be the reason to use an NSInteger vs an int in iPhone programming? Thanks.

回答1:

An NSInteger is just a typedef with the following definition:

#if __LP64__ || NS_BUILD_32_LIKE_64
  typedef long NSInteger;
  typedef unsigned long NSUInteger;
#else
  typedef int NSInteger;
  typedef unsigned int NSUInteger;
#endif

As the typedef is defined differently basing on the platform, you can keep using NSInteger independently from the platform.