如何將typedef枚舉轉換爲NSNumber？

Question

1. 是否將typedef enum的每個值視爲int？

   例如，給出以下typedef enum：

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

   我如何知道使用哪種方法來創建一個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); 
   

   我覺得+[NSNumber numberWithInt:]是使用的，因爲accepted answer to Best way to implement Enums with Core Data使用它的正確方法。例如：

   [NSNumber numberWithInt:UIViewAnimationCurveLinear] 
   

   但是，如果+[NSNumber numberWithInt:]是正確的，那麼爲什麼？

2. 對於按位enum，例如：

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

   我猜+[NSNumber numberWithUnsignedInteger:]是使用，因爲有typedef後明確NSUInteger正確的方法。正確？例如爲：

   [NSNumber numberWithUnsignedInteger:UIViewAutoresizingNone] 
   

Answer 1

如今現代語法可以用於：

@(UIViewAnimationCurveLinear)

Answer 2

[NSNumber的numberWithInt：your_enum_int_variable];