Saving a NSArray

Question

I would like to save an NSArray either as a file or possibly use user defaults. Here\'s what I am hoping to do.

1. Retrieve already saved NSArray (if any).
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Answer 1

You could implement NSCoding on the objects the array contains and use NSKeyedArchiver to serialize/deserialize your array to disk.

BOOL result = [NSKeyedArchiver archiveRootObject:myArray toFile:path];

The archiver will defer to your NSCoding implementation to get serializable values from each object and write a file that can be read with NSKeyedUnarchiver:

id myArray = [NSKeyedUnarchiver unarchiveObjectWithFile:path];

More info in the serialization guide.