Can't apply line spacing with UITextView?

Question

Do you have any ideas about line spacing with UITextView? I cannot apply it. Below it is my code.

import UIKit

class DetailViewController: UIViewController {
    @IBOutlet weak var itemTextView: UITextView!
    var txtString: String?
    var txtTitleBar:String?

    override func viewDidLoad() {
        super.viewDidLoad()
        //navigationController?.navigationItem.title = "Love"
        self.title = txtTitleBar

        //self.tabBarController?.navigationItem.title = "My Title"
        itemTextView.text = txtString
        itemTextView.font = UIFont(name: "Arial-Regular", size:20)
        itemTextView.font = .systemFont(ofSize: 25)
        (itemTextView.font?.lineHeight)! * 5
    }
}

enter image description here

What is `(itemTextView.font?.lineHeight)! * 5` supposed to do? — rmaddy, Mar 23 '17 at 03:02
No, that does not apply line spacing. You read the line spacing value and multiply that value by 5. But you do nothing with the result. — rmaddy, Mar 23 '17 at 03:12
Now it is working with this: let style = NSMutableParagraphStyle() style.lineSpacing = 20 let attributes = [NSParagraphStyleAttributeName : style] textView.attributedText = NSAttributedString(string: txtString, attributes: attributes) — Ravy Chheng, Mar 23 '17 at 03:15
You should accept the appropriate answer instead of posting "thank you". — rmaddy, Mar 23 '17 at 03:16
Click the checkmark to the left of the answer that you feel best answered your question. — rmaddy, Mar 23 '17 at 03:20
When I click on it, it show the message : Thank for the feedback! Votes cast by those with less than 15 reputation.......... — Ravy Chheng, Mar 23 '17 at 03:22

score 24 · Accepted Answer · edited May 23 '17 at 11:54

24

You need to use an attributed string and assign a paragraph style. For example:

let style = NSMutableParagraphStyle()
style.lineSpacing = 20
let attributes = [NSParagraphStyleAttributeName : style]
textView.attributedText = NSAttributedString(string: txtString, attributes: attributes)

See this SO answer for more details on attributed string usage: How do I make an attributed string using Swift?

edited May 23 '17 at 11:54

Community

1
1

answered Mar 23 '17 at 03:02

garrettmurray

3,258
1
23
23

1

Okay, but how do I keep the text the user is entering in the same paragraph style? Do I have to perform your code on every textFieldDidChange: event? – linus_hologram Nov 05 '19 at 19:41
@linus_hologram Having the same problem did you have any luck with this? – Tom Wicks Jan 05 '20 at 13:11
@TomWicks I ended up using this code with every textFieldDidChange: event. As far as I know, this is the only option – linus_hologram Jan 05 '20 at 14:39
2

Use `textView.typingTextAttributes`. This will allow you to set the default attributes. – Jake A. Jul 15 '20 at 17:11

score 5 · Answer 2 · answered Jan 12 '18 at 11:26

5

Xcode 9.2 Swift 4

let style = NSMutableParagraphStyle()
style.lineSpacing = 0
let attributes = [NSAttributedStringKey.paragraphStyle : style]
txtViewAbout.attributedText = NSAttributedString(string: txtViewAbout.text, attributes: attributes)

answered Jan 12 '18 at 11:26

Khawar Islam

2,062
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score 4 · Answer 3 · edited Dec 18 '19 at 08:28

4

Xcode 10.1 Swift 4.2

let style = NSMutableParagraphStyle()
style.lineSpacing = 19
let attributes = [NSAttributedString.Key.paragraphStyle: style]
textView.attributedText = NSAttributedString(string: model.text, attributes: attributes)

edited Dec 18 '19 at 08:28

LionHere

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answered Nov 14 '18 at 19:10

GorbunovAlexey

61
7

score 0 · Answer 4 · answered Mar 13 '21 at 21:19

Using typingAttributes will make sure that, the attributes apply to new text that the user enters.

    let style = NSMutableParagraphStyle()
    style.lineSpacing = 10
    let attributes = [NSAttributedString.Key.paragraphStyle : style )
    ]
    textView.typingAttributes = attributes

Can't apply line spacing with UITextView?

4 Answers4

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