Extra whitespace that causes a newline by UITextView at end is ignored

Question

This is my code:

import UIKit

class ViewController: UIViewController {
    init() {
        super.init(nibName: nil, bundle: nil)

        let textView = UITextView(frame: .zero)
        textView.isScrollEnabled = false
        textView.translatesAutoresizingMaskIntoConstraints = false
        view.addSubview(textView)

        NSLayoutConstraint.activate([
           textView.widthAnchor.constraint(equalToConstant: 150),
            textView.centerXAnchor.constraint(equalTo: view.centerXAnchor),
            textView.centerYAnchor.constraint(equalTo: view.centerYAnchor)
        ])

        // As we can see, LOT'S of whitespace at the end.
        textView.text = "Some Random Text That Has Whitespaces At The End                                                        "

        view.backgroundColor = .yellow
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError()
    }
}

This is the result:

By the amount of spaces, it should have created an empty newline. However, as we can see this wasn't the case. If I add another character at the very end of the string, the newline will be shown (but with the character, which I do not want).

How can I show an empty newline if needed in an UITextView?

Note that you have the same behavior when writing a message on Message.app — Larme, May 24 '19 at 20:05
@LinusGeffarth That always creates a newline. The UITextView should only append a newline if it is needed — J. Doe, May 24 '19 at 20:06
@Larme yes, that is accomplished by removing the leading & trailing whitespaces. I must keep them. — J. Doe, May 24 '19 at 20:06
Wait, can you please clear up what you're trying to do? What do you mean by *if needed*? — LinusGeffarth, May 24 '19 at 20:07
I'm wondering if using another "invisible" char at the end would do the trick. — Larme, May 24 '19 at 20:08
@LinusGeffarth I have a string with lots of whitespaces at the end. The textview just ignores it. I don't want that. — J. Doe, May 24 '19 at 20:09
Hm, I'm not sure if the text field ignores it. The space after "end" seems to be enough to fit the textview. Try adding more spaces to see if it works. — Xcoder, May 24 '19 at 20:53
@Xcoder not enough??? The amount of whitespaces is equal to the existing text. But it does not matter how many whitespaces there are. — J. Doe, May 25 '19 at 09:31

score 1 · Accepted Answer · answered May 24 '19 at 20:48

1

Use this:

‏‏‎ ‏‏‎

There is some invisible characters inside the quote that iOS is not count them as whiteSpace

answered May 24 '19 at 20:48

Mojtaba Hosseini

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I've used this and it worked for me in 90% of the cases, I have a few where the last line is nonetheless cut off. Do you have any other solution? In my case I'm using a `UILabel` – Niklas Dec 13 '21 at 12:53
@Niklas you found a solution? – J. Doe Apr 17 '22 at 16:23
Nope. Did you @J.Doe? – Niklas Apr 18 '22 at 19:07
@Niklas I have an extremely hacky solution by using NSMutableAttributedString. Long story short: append something like ' |' behind your text, wrap in inside an NSMutableAttributedString and change the color of the last character (which is |) to UIColor.clear. Than it always works in every scenario – J. Doe Apr 19 '22 at 09:31

Ludyem · Answer 2 · 2019-05-25T02:15:10.443

0

to add extra lines use "\n" for example:

textView.text = "Some Random Text That Has Whitespaces At The End \n\n"

Result:

https://i.stack.imgur.com/QkCmc.jpg

edited May 25 '19 at 02:15

answered May 24 '19 at 22:08

Ludyem

1,709
1
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This does not answer the question – J. Doe May 24 '19 at 22:21
@J.Doe Post Question: how can I show an empty newline if needed in an UITextView? Answer: to add extra lines use "\n" Did I get it wrong? – Ludyem May 25 '19 at 02:16
No. You point out exactly the problem with your answer: you always show a newline. You literally quoted the words 'if needed'. – J. Doe May 25 '19 at 09:30

Extra whitespace that causes a newline by UITextView at end is ignored

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