When does encodeWithCoder get called?

Question

This will save an array (I think).

- (void)encodeWithCoder:(NSCoder *)encoder {
    [encoder encodeObject:myArray forKey:@"myArray"];
}

Do I have to directly call this method when I want to save an array or do I have to do something else?

Don't forget to call super: - (void)encodeWithCoder:(NSCoder *)encoder { [super encodeWithCoder:coder]; [encoder encodeObject:myArray forKey:@"myArray"]; } — Magnus
– Magnus, Commented Feb 29, 2012 at 23:33

anon · Accepted Answer · 2010-09-18 13:46:53Z

8

You don’t call this method directly. It’s called by a NSCoder subclass if it needs to serialize that object. If you want to encode an object graph use the class methods archivedDataWithRootObject: or archiveRootObject:toFile: of NSKeyedArchiver. This in turn will call the encodeWithCoder: method of your objects. Also note that every object in your array has to implement the NSCoding protocol.

answered Sep 18, 2010 at 13:46

anon

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1 Comment

Kunal Gupta Over a year ago

I am using RMMapper library to set value in UserDefaults. The library uses NSData *encodedObject = [NSKeyedArchiver archivedDataWithRootObject:obj]; to encode the object but still this method is not called. I have been stuck on this issue for long. Can you help me with this?

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