How do I create a temporary file with Cocoa?

Years ago when I was working with C# I could easily create a temporary file and get its name with this function:

Path.GetTempFileName();

This function would create a file with a unique name in the temporary directory and return the full path to that file.

In the Cocoa API's, the closest thing I can find is:

NSTemporaryDirectory

Am I missing something obvious or is there no built in way to do this?