What's the optimum way of storing an NSDate in NSUserDefaults?

Question

There\'s two ways of storing an NSDate in NSUserDefaults that I\'ve come across.

Option 1 - setObject:forKey:

// Set
NSDate *myDate = [NSDate date]         


        

Answer 1

For option #1, I don't believe a date formatter is involved. Possibly under the hood, but I imagine it's not broken. The date is stored in ISO 8601 form.

For option #2, use -setDouble:forKey: and -doubleForKey instead of the float-based versions. That might be the cause of your precision errors.