iOS - self.refreshControl not recognized

iOS - self.refreshControl not recognized

I have this line
self.refreshControl = [[UIRefreshControl alloc] init];
but it is not recognized and I get a compile error:
property refreshControl not found
I am working from this tutorial:
http://www.raywenderlich.com/21081/introduction-to-in-app-purchases-in-ios-6-tutorial
And they provide this code as though it is supposed to just work. And idea
why the compile error happens?
Thanks!