How do I force a UITextView to scroll to the top every time I change the text?

UITextView*note;
[note setContentOffset:CGPointZero animated:YES];

This does it for me.

Swift version (Swift 4.1 with iOS 11 on Xcode 9.3):

note.setContentOffset(.zero, animated: true)

If anyone has this problem in iOS 8, I found that just setting the UITextView's text property, then calling scrollRangeToVisible with an NSRange with location:0, length:0, worked. My text view was not editable, and I tested both selectable and not selectable (neither setting affected the result). Here's a Swift example:

myTextView.text = "Text that is long enough to scroll"
myTextView.scrollRangeToVisible(NSRange(location:0, length:0))

And here is my solution...

    override func viewDidLoad() {
        textView.scrollEnabled = false
        textView.text = "your text"
    }

    override func viewDidAppear(animated: Bool) {
        textView.scrollEnabled = true
    }