Scroll TextView to the top

Question

I have a Text View (UITextView) which displays a long text that is set on runtime like so:

@IBOutlet weak var textView: UITextView!

override func viewDidLoad() {
    super.viewDidLoad()

    if something {
        textView.text = "(very long text here)"
    }

    textView.contentOffset = CGPoint.zero  // doesn't work

}

Unfortunately, when the Text View is displayed, the text is not scrolled to the top but somewhere in the middle.

I'm thinking, either setting the contentOffset is the wrong way of doing it or I am doing it at the wrong time (maybe the text gets changed after setting contentOffset?).

I have tried a lot, I even contacted Apple Code Level Support. They couldn't help me, really (which surprised the hell out of me) – can you?

I'd very much appreciate it. Thank you.

These answers didn't help me, unfortunately. :( https://stackoverflow.com/questions/9450302/get-uiscrollview-to-scroll-to-the-top — Marian Stiehler, Feb 12 '19 at 21:34

redribben · Accepted Answer · 2019-02-13T07:41:53.240

2

I had a very similar issue, especially when using splitview and testing on the iPhoneX, I resolved this by incorporating this bit of code in my ViewController when I needed the textView to scroll to the top:

textView.setContentOffset(.zero, animated: false)
textView.layoutIfNeeded()

If you wish to scroll to the top of the textView upon loading your ViewController:

override func viewDidLayoutSubviews() {
        super.viewDidLayoutSubviews()

        // Can add an if statement HERE to limit when you wish to scroll to top
        textView.setContentOffset(.zero, animated: false)
}

edited Feb 13 '19 at 07:41

answered Feb 13 '19 at 01:41

redribben

186
1
7

I had only thought to point out that they needed only one more line of code, didn't want to clutter the answer. I tried to elaborate a bit more since you asked. – redribben Feb 13 '19 at 07:46
You are a genius! Calling .setContentOffset in viewDidLayoutSubviews() worked! Thanks a lot. – Marian Stiehler Feb 13 '19 at 15:50

score 0 · Answer 2 · answered Feb 12 '19 at 22:25

You may need to write more information/code because if you try this piece of code in clean project with only one VC with UITextView, you'll see that it's actually working. If you're really using some condition (if something) this might be the issue. What is this something in your real code?

score 0 · Answer 3 · answered Feb 13 '19 at 02:09

0

You need to use viewDidLayoutSubviews() so that it set the scrollview to the top.

override func viewDidLayoutSubviews() {
   textView.setContentOffset(.zero, animated: false)
}

answered Feb 13 '19 at 02:09

MwcsMac

6,810
5
32
52

Scroll TextView to the top

3 Answers3