如何将 typedef enum 转换为 NSNumber？

Question

1. 每个typedef enum的值是否被视为int类型？

   例如，给定以下typedef enum：

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

   我该如何知道在创建 NSNumber 时使用哪种方法？

   + (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);
   

   我认为+[NSNumber numberWithInt:]是正确的方法，因为Best way to implement Enums with Core Data的被接受答案使用了这个方法。例如：

   [NSNumber numberWithInt:UIViewAnimationCurveLinear]
   

   但是，如果+[NSNumber numberWithInt:]是正确的，那么为什么呢？

2. 对于一个位运算的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;
   

   我猜测 +[NSNumber numberWithUnsignedInteger:] 是正确的方法，因为在 typedef 之后有明确的 NSUInteger。是这样吗？例如：

   [NSNumber numberWithUnsignedInteger:UIViewAutoresizingNone]
   

- ma11hew28

Answer 1

现代语法可以使用：

@（UIViewAnimationCurveLinear）

- Felipe Docil

Answer 2

[NSNumber numberWithInt:your_enum_int_variable];

- j2emanue

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你很棒！谢谢。 - Mohammad Zaid Pathan