Question

I was wondering whether or not it is possible to use the NSCoder method:

- (void)encodeObject:(id)objv forKey:(NSString *)key

to encode either an instance of NSArray or NSDictionary. If not how do you go about encoding them? I am trying to use NSKeyedArchived / NSKeyedUnarchiver to send data between phones using GameKit. I tried it and cannot seem to retrieve the string I stored in my array. The packet class I made comes through along with the packet type integer, but not the data in the array it seems.

Thanks in advance!

Answer 1

NSKeyedArchiver/Unarchiver should encode and decode NSArrays and NSDictionaries with no problem. If your packet class you’ve created implements the NSCoding protocol, you need to explicitly call [encodeObject:myNsArrayforKey:@"stringsArray"] in your -encodeWithCoder: method (assuming that myNsArray is the name of the instance variable in your packet object you want to encode). But then the archiver and NSArray should take care of the rest of it. If you’re doing this, it would be helpful to hear more about the layout of your classes and who’s calling who when encoding/decoding.