How can I add a custom Object in Interface Builder?

I'm using XCode4 and using the awesome TTTAttributedLabel class. I've created a开发者_运维问答n NSObject and set its class to TTTAttributedLabel. I can't seem to add this to my View. How can I do so?

---

If your class subclasses a standard control, then you can edit the class in the right panel. Here's how you'd change the class of a UILabel:

Other than that, Xcode 4 dropped support for IB plugins.