Do I need to use NSKeyedArchiver?

I have an object. It has only two NSStrings as properties.

I created an array to hold several of these objects.

Do I need to use NSKeyedArchiver to save this array to disk, or can I ju开发者_开发问答st use NSUserDefaults?

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If your object is a custom class, you will need to use NSKeyedArchiver before you put the contents in NSUserDefaults. See here.

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You can just use [[NSUserDefaults standardUserDefaults] setObject:myArray forKey:myKey]; for writing and [[NSUserDefaults standardUserDefaults] arrayForKey:myKey]; for reading (there is no setArray:forKey: as it's not needed).

Also, if you got an array that you don't want to store inside NSUserDefaults there's an easy possibility to write and read arrays: -[NSArray writeToFile:atomically:] and +[NSArray arrayWithContentsOfFile:]. There also the same methods for NSDictionary to easily read/write dictionaries. Of course you're always free to use NSKeyed(Un)Archiver as well.