Objective C - UILabel multiline vertical gap height

Question

I have a multiline UILabel that can take a maximum of 3 lines. i.e message.numberOfLines = 3;

Everything works fine, but how can I set the vertical gap between the lines? e.g between line 1 and line 2 etc?

Please enlight,
Tee

This might help : http://stackoverflow.com/questions/3880526/how-to-increase-a-space-between-two-lines-in-multiline-label — Ambili B Menon, Jan 11 '13 at 06:13

score 3 · Answer 1 · answered Nov 15 '09 at 09:53

3

I haven't been able to find a way to adjust the spacing between lines. The font property of UILabel has a number of read-only properties, so that won't help.

I've resorted to draw my own text if I want to change the line spacing. I use NSString's -drawAtPoint and -drawInRect and use one or more of the -sizeWithFont methods to figure out how long the text will be in order to split the text and draw the right number of words or characters per line.

answered Nov 15 '09 at 09:53

mahboudz

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Yeah, making line-height read-only seems an extremely curious oversight. Like, "Who would ever want to adjust THAT??" :) – Henrik Erlandsson Jan 20 '11 at 14:43

score 0 · Answer 2 · edited Nov 16 '11 at 22:36

0

Unfortunately, the only good way to do this that I'm aware of is to draw the text yourself. On 3.2 or later, you can use CoreText to draw the text directly - I'm not sure if CT is available on iPhones >= 4.0. CoreText is a functional C API for flexible text drawing.

edited Nov 16 '11 at 22:36

0xced

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answered Jan 12 '11 at 05:47

rcw3

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score 0 · Answer 3 · answered Oct 13 '17 at 12:17

Programmatically:

SWift 4

Using label extension

extension UILabel {

    // Pass value for any one of both parameters and see result
    func setLineSpacing(lineSpacing: CGFloat = 0.0, lineHeightMultiple: CGFloat = 0.0) {

        guard let labelText = self.text else { return }

        let paragraphStyle = NSMutableParagraphStyle()
        paragraphStyle.lineSpacing = lineSpacing
        paragraphStyle.lineHeightMultiple = lineHeightMultiple

        let attributedString:NSMutableAttributedString
        if let labelattributedText = self.attributedText {
            attributedString = NSMutableAttributedString(attributedString: labelattributedText)
        } else {
            attributedString = NSMutableAttributedString(string: labelText)
        }

        // Line spacing attribute
        attributedString.addAttribute(NSAttributedStringKey.paragraphStyle, value:paragraphStyle, range:NSMakeRange(0, attributedString.length))

        self.attributedText = attributedString
    }
}

Now call extension function

let label = UILabel()
let stringValue = "How to\ncontrol\nthe\nline spacing\nin UILabel"

// Pass value for any one argument - lineSpacing or lineHeightMultiple
label.setLineSpacing(lineSpacing: 2.0) .  // try values 1.0 to 5.0

// or try lineHeightMultiple
//label.setLineSpacing(lineHeightMultiple = 2.0) // try values 0.5 to 2.0

Or using label instance (Just copy & execute this code to see result)

let label = UILabel()
let stringValue = "How to\ncontrol\nthe\nline spacing\nin UILabel"
let attrString = NSMutableAttributedString(string: stringValue)
var style = NSMutableParagraphStyle()
style.lineSpacing = 24 // change line spacing between paragraph like 36 or 48
style.minimumLineHeight = 20 // change line spacing between each line like 30 or 40

// Line spacing attribute
attrString.addAttribute(NSAttributedStringKey.paragraphStyle, value: style, range: NSRange(location: 0, length: stringValue.characters.count))

// Character spacing attribute
attrString.addAttribute(NSAttributedStringKey.kern, value: 2, range: NSMakeRange(0, attrString.length))

label.attributedText = attrString

From Interface Builder:

enter image description here

Objective C - UILabel multiline vertical gap height

3 Answers3

Linked