granoff/Lockbox — pull request #4 by compressed (2012-07-10 14:58:09+00:00)
Title: Subclass NSObject for Lockbox

Thanks for making Lockbox!

I ran into an issue when using this with RubyMotion. I was receiving the following error:

```console
(main)> Lockbox.class
2012-07-10 06:57:06.400 app[96021:15203] *** NSInvocation: warning: object 0x246030 of class 'Lockbox' does not implement methodSignatureForSelector: -- trouble ahead
```

This error seems to stem from the Lockbox class not subclass NSObject. Making Lockbox subclass NSObject fixes the issue for me.