NSCoder: encoding enum without using NS_ENUM

Question

I don't want to force my users to update to iOS 6 and hence I wanted to find a way to use NSCoder with custom types and enumerations.

I have found this article that explains the recently introduced NS_ENUM macro, that basically makes it easier to the runtime library to retrieve the the metadata of the custom enumeration / type.

Is there an alternative way to encode custom enumerations?

I have found this answer, is encoding as INT all I need to do? Enumerations are int but I am not sure if they can change to int32 or int64.

score 2 · Answer 1 · answered Aug 21 '13 at 17:46

2

Yes, encode it as an int and you should be fine. You could create a NSNumber with its value and then encode it. That would be the most common case.

answered Aug 21 '13 at 17:46

rocir

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score 1 · Answer 2 · answered Mar 12 '18 at 22:18

Just encode the value as NSNUMBER. Use this for any version of iOS.

 // #pragma mark Protocolo NSCoding
- (void)encodeWithCoder:(nonnull NSCoder *)aCoder {
     [aCoder encodeObject:@(self.customValue) forKey:@"customKey"];
  }

- (nullable instancetype)initWithCoder:(nonnull NSCoder *)aDecoder { 
    self = [super init];
    if (self) {
        self.customValue = [aDecoder decodeObjectForKey:@"customKey"];
    }
    return self;
  }

NSCoder: encoding enum without using NS_ENUM

2 Answers2