Uitextview Is Not Scrolled to Top When Loaded

UITextView is not scrolled to top when loaded

UITextView is a subclass of UIScrollView, so you can use its methods. If all you want to do is ensure that it's scrolled to the top, then wherever the text is added try:

[self.mainTextView setContentOffset:CGPointZero animated:NO];

EDIT: AutoLayout with any kind of scrollview gets wonky fast. That setting a fixed width solves it isn't surprising. If it doesn't work in -viewDidLayoutSubviews then that is odd. Setting a layout constraint manually may work. First create the constraints in IB:

@property (weak, nonatomic) IBOutlet NSLayoutConstraint *textViewWidthConstraint;
@property (weak, nonatomic) IBOutlet NSLayoutConstraint *textViewHeightConstraint;

then in the ViewController

    -(void)updateViewConstraints {
            self.textViewWidthConstraint.constant = self.view.frame.size.width - 40.0f;
            self.textViewHeightConstraint.constant = self.view.frame.size.height - 40.0f;
            [super updateViewConstraints];
        }

May still be necessary to setContentOffset in -viewDidLayoutSubviews.

(Another method would be to create a layout constraint for "'equal' widths" and "'equal' heights" between the textView and its superView, with a constant of "-40". It's only 'equal' if the constant is zero, otherwise it adjusts by the constant. But because you can only add this constraint to a view that constraints both views, you can't do this in IB.)

You may ask yourself, if I have to do this, what's the point of AutoLayout? I've studied AutoLayout in depth, and that is an excellent question.

UITextview does not scroll to top

Use contentOffset property:

textView.contentOffset = CGPointZero

Update for Swift 3:

textView.contentOffset = CGPoint.zero

Scroll TextView to the top

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)
}

How to scroll to top of UITextView?

The most obvious solution is to set the location parameter of NSMakeRange to 0 instead of theTextView.text.characters.count - 1.

let bottom = NSRange(location: 0, length: 1)

A better way is to note that UITextView extends UIScrollView. So you can set the contentOffset:

theTextView.contentOffset = .zero

If your want to animate the scrolling, use:

theTextView.setContentOffset(.zero, animated: true)

---

Related Topics