Error when adding a string to a NSMutableAttributedString - ios

Question

I have this function for adding a bullet to a textView
let bullet: String = " ● "
func setAttributedValueForBullets(bullet: String, positionWhereTheCursorIs: Int?) {
var textRange = selectedRange
let selectedText = NSMutableAttributedString(attributedString: attributedText)
if let line = positionWhereTheCursorIs {
textRange.location = line
}
selectedText.mutableString.replaceCharacters(in: textRange, with: bullet)
let paragraphStyle = createParagraphAttribute()
selectedText.addAttributes([NSParagraphStyleAttributeName: paragraphStyle], range: NSMakeRange(textRange.location, bullet.length))
self.attributedText = selectedText
self.selectedRange = textRange
}
and it works when inserting a bullet to a paragraph with just one line like this
but when I add it to a paragraph with more than one line this happen
I want it to look like in the first image, without that space in the bullet and the begining of text
I have also tried to use
selectedText.insert(bullet, at: textRange.location)
instead of
selectedText.addAttributes([NSParagraphStyleAttributeName: paragraphStyle], range: NSMakeRange(textRange.location, bullet.length))

Answer 1

This is essentially happening because of the space between the bullet point and the long description. If the description is too long, it will, by normal behavior, go on to it's own line, wrapping the rest of the string.
The easiest fix for this, is to use a non-breaking unicode space character (u00A0):
let bullet = "●\u{00A0}"
let string = "thisisaveryveryveryveryveryveryveryveryveryverylongstring"
textView.text = bullet + string
This will result in the expected behavior, where the very long string will not break into it's own line, as it will be connected to the preceding bullet point:
Also, if the space between the bullet and the string is too small, simply string together multiple non-breaking spaces:
let bullet = "●\u{00A0}\u{00A0}"

Answer 2

func attributeString() -> NSAttributedString{
let attribute = NSMutableAttributedString(string: "●DESCRIPTION\n", attributes: [NSFontAttributeName : UIFont.systemFont(ofSize: 14)])
let style = NSMutableParagraphStyle()
style.lineSpacing = 10
let range = NSMakeRange(0, attribute.string.characters.count)
attribute.addAttribute(NSParagraphStyleAttributeName, value: style, range: range)
return attribute
}