I want to center the text *vertically* inside a big `UITextView` that fills the whole screen - so that when there's little of text, say a couple of words, it is centered by height. 
It's not a question about centering the text (a property that can be found in IB) but about putting the text *vertically* right in the middle of `UITextView` *if* the text is short, so there are no blank areas in the `UITextView`.
Can this be done? Thanks in advance!