UITextview does not scroll to top

Question

I am using a UITextView to display a long text in ViewDidLoad():

var story1 = "Researchers on Friday introduced the stunningly realistic-looking interactive humanoid robot to the world, and she reacted by nodding her head, squinting, moving her hand and eyeballs and telling assembled local photographers, with her speech synched to her lip movements, to snap her face from a more flattering angle. Girl's got spirit. \n\nJia Jia made her public debut at the University of Science and Technology of China, where she came to life over the course of three years. While her rosy cheeks and pink lips make her look like she has blood running through her actuators, she still has a way to go before she'll be confused with a human. Her expressions are currently limited to 'microexpressions' and her speech has that distinct stiffness that screams 'I am a robot and I will one day chase you from your home'\n\......." // a very long text with many rows
self.storyTextView.text = story1

If I set Scrolling Enabled for storyTextView, the textview displays the text not from the beginning. I can see the scroll indicator in the middle (or bottom) of the text.

see screenshot1.

I tried

self.storyTextView.scrollsToTop = true

but it does not help.

If I uncheck Scrolling Enabled, or if the text is not too long to display whole text in a UITextView, it displays from the beginning as expected. See screenshot2.

Is there any way to display the long text from the beginning of the text (move scroll indicator to the top)? I checked constraints and layout but it seems not related. I did search a lot but no luck until now. I might missed some simple setting but anyone can help me out please.

Alexander Doloz · Accepted Answer · 2016-12-22 14:07:34Z

7

Use contentOffset property:

textView.contentOffset = CGPointZero

Update for Swift 3:

textView.contentOffset = CGPoint.zero

edited Dec 22, 2016 at 14:07

answered Apr 19, 2016 at 14:46

Alexander Doloz

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3 Comments

Adaoli Over a year ago

thank you. you are correct. And I know from another question's answer that this need to be done in viewDidLayoutSubviews(). stackoverflow.com/questions/28053140/…

Adaoli Over a year ago

I add this and the issue solved. override func viewDidLayoutSubviews() { self.StoryTextView.setContentOffset(CGPointZero, animated: false) }

Dark Over a year ago

Swift 3: CGPointZero -> CGPoint.zero

Forge · Accepted Answer · 2018-12-08 15:48:14Z

2

The only workaround which is working on iOS 11 and swift 4 is to set scroll off at viewDidLoad and set ON at viewDidAppear. It works for both UIScrollView and UiTextView. Tested code.

 override func viewDidLoad() {
    super.viewDidLoad()
    scrollView.isScrollEnabled = false
 }

 override func viewDidAppear(_ animated: Bool) {
    super.viewDidAppear(animated)
    scrollView.isScrollEnabled = true
 }

edited Dec 8, 2018 at 15:48

Forge

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answered Dec 11, 2017 at 9:33

Dipayan Ghose

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Comments

Forge · Accepted Answer · 2018-12-08 15:47:36Z

1

Try this: self.storyTextView.scrollRangeToVisible(NSRange(location:0, length:0))

edited Dec 8, 2018 at 15:47

Forge

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answered Apr 19, 2016 at 14:47

Manuel

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1 Comment

NSNoob Over a year ago

What makes you think he is not doing it on main thread already?

Md Imran Choudhury · Accepted Answer · 2019-05-29 15:17:38Z

0

In my case this solution is work, Swift 4:

override func viewDidLayoutSubviews() {
    self.txt_about.setContentOffset(CGPoint.zero, animated: false)
}

answered May 29, 2019 at 15:17

Md Imran Choudhury

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Comments

Teja Kumar Bethina · Accepted Answer · 2020-07-08 09:02:39Z

0

Add the below method in ViewController

 override public func viewWillLayoutSubviews() {
   super.viewWillLayoutSubviews()
   textView.contentOffset = CGPoint.zero
 }

answered Jul 8, 2020 at 9:02

Teja Kumar Bethina

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