How to convert typedef enum to NSNumber?

Question

1. Is each value of a typedef enum treated as an int?

   E.g., given the following typedef enum:

   // UIView.h
   
   typedef enum {
       UIViewAnimationCurveEaseInOut,
       UIViewAnimationCurveEaseIn,
       UIViewAnimationCurveEaseOut,
       UIViewAnimationCurveLinear
   } UIViewAnimationCurve;
   

   How do I know which method to use to create an NSNumber?

   + (NSNumber *)numberWithShort:(short)value;
   + (NSNumber *)numberWithUnsignedShort:(unsigned short)value;
   + (NSNumber *)numberWithInt:(int)value;
   + (NSNumber *)numberWithUnsignedInt:(unsigned int)value;
   + (NSNumber *)numberWithLong:(long)value;
   + (NSNumber *)numberWithUnsignedLong:(unsigned long)value;
   + (NSNumber *)numberWithLongLong:(long long)value;
   + (NSNumber *)numberWithUnsignedLongLong:(unsigned long long)value;
   + (NSNumber *)numberWithInteger:(NSInteger)value NS_AVAILABLE(10_5, 2_0);
   + (NSNumber *)numberWithUnsignedInteger:(NSUInteger)value NS_AVAILABLE(10_5, 2_0);
   

   I think +[NSNumber numberWithInt:] is the correct method to use because the accepted answer to Best way to implement Enums with Core Data uses it. E.g.:

   [NSNumber numberWithInt:UIViewAnimationCurveLinear]
   

   But, if +[NSNumber numberWithInt:] is correct, then why?

2. For a bitwise enum, e.g.:

   enum {
       UIViewAutoresizingNone                 = 0,
       UIViewAutoresizingFlexibleLeftMargin   = 1 << 0,
       UIViewAutoresizingFlexibleWidth        = 1 << 1,
       UIViewAutoresizingFlexibleRightMargin  = 1 << 2,
       UIViewAutoresizingFlexibleTopMargin    = 1 << 3,
       UIViewAutoresizingFlexibleHeight       = 1 << 4,
       UIViewAutoresizingFlexibleBottomMargin = 1 << 5
   };
   typedef NSUInteger UIViewAutoresizing;
   

   I'm guessing that +[NSNumber numberWithUnsignedInteger:] is the correct method to use because there is an explicit NSUInteger after typedef. Correct? E.g.:

   [NSNumber numberWithUnsignedInteger:UIViewAutoresizingNone]
   

Answer 1

Nowadays modern syntax can be used:

@(UIViewAnimationCurveLinear)