How to use NSCoding protocol with an enum?

Question

i have this enum:

typedef types {
    HBIntineraryTypeVisited = 0,
    HBIntineraryTypeUnvisited,
    HBIntineraryTypeUnknown,
    HBIntineraryTypeDeleted,
} HBIntineraryType;

and want to store it along with some other variables using the nscoding protocol

- (id)initWithCoder:(NSCoder *)aDecoder
{
    self = [super init];
    if (self) {
       _name = [aDecoder decodeObjectForKey:@"name"];
       // todo decode enum object
    }
}

- (void)encodeWithCoder:(NSCoder *)aCoder
{
    [aCoder encodeObject:_name forKey:@"name"];
    // todo encode enum object
}

What coder method do i use to decode and encode this kind of enum?

decodeInt/encodeInt (with some casting).

trojanfoe
– trojanfoe

2013-01-31 09:53:28 +00:00
Commented Jan 31, 2013 at 9:53 — trojanfoe
– trojanfoe, Commented Jan 31, 2013 at 9:53

Jim · Accepted Answer · 2021-06-14 05:53:35Z

5

Generally speaking the representation of enums can vary. When working with Objective-C, you should use the NS_ENUM macro to be sure of which type is used to represent the enumeration. There's more background in this article.

edited Jun 14, 2021 at 5:53

answered Jan 31, 2013 at 9:55

Jim

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2 Comments

Kaunteya Over a year ago

This is the drawback of putting links as answer. You can never tell when they would start showing 404 :(

Pierre Over a year ago

Most blog articles from Big Nerd Ranch were moved. Here is the new url: bignerdranch.com/blog/enum-num-num

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