I am trying to use NSMutableAttributedString with dotted underline below is my code but none of the Patterns seem to work am I missing something ?
var str : NSMutableAttributedString = NSMutableAttributedString(string: "HelloWorld")
str.addAttribute(NSUnderlineStyleAttributeName , value: NSNumber(integer:(NSUnderlineStyle.PatternDot).rawValue), range: NSMakeRange(0, str.length))
You have to do it like this:
Xcode 10 • Swift 4.2 or later
yourLabel.attributedText = NSAttributedString(string: "Hello World !!!", attributes: [.underlineStyle: NSUnderlineStyle.patternDot.union(.single).rawValue])
Note: for older Swift syntax check edit history
Related
This question already has an answer here:
How to use NSUnderlineStyle.PatternDot
(1 answer)
Closed 1 year ago.
I have the following code to try to underline a label's string.
let attributedString = NSMutableAttributedString(string: "Hello World!")
attributedString.addAttribute(NSAttributedString.Key.underlineStyle, value: NSUnderlineStyle.single, range: NSRange.init(location: 0, length: attributedString.length))
label.attributedText = attributedString
However, when running the code the label shows Hello World! with no underline.
I'm running Xcode 12.4, and using an iOS 14.4 iPhone 12 Pro Max simulator.
It seems like this is a bug. Changing the value from NSUnderlineStyle.single to 1 fixes the issue.
The final code would look something like the following.
let attributedString = NSMutableAttributedString(string: "Hello World!")
attributedString.addAttribute(NSAttributedString.Key.underlineStyle, value: 1, range: NSRange.init(location: 0, length: attributedString.length))
label.attributedText = attributedString
I have a label and I added a attributed string to it. The string is,
let nameText = "My name is Shreesha and Im an iOS developer. My name is Shreesha and Im an iOS developer."`My name is Shreesha and Im an iOS developer. My name is Shreesha and Im an iOS developer.`
In this text I'm trying to add a * in the beginning of the text so I used an attributed string and the code looks like this,
func attributedTextForFeeApplies() -> NSAttributedString {
let attributedText = NSMutableAttributedString(string: "* " + nameText)
attributedText.addAttribute(NSAttributedStringKey.foregroundColor, value: UIColor.blue, range: NSMakeRange(0, attributedText.length))
attributedText.addAttribute(NSAttributedStringKey.font, value: UIFont.systemFont(ofSize: 10), range: NSMakeRange(0, attributedText.length))
let superScriptString = "* "
attributedText.addAttribute(NSAttributedStringKey.baselineOffset, value: 2, range: NSMakeRange(0, superScriptString.characters.count))
attributedText.addAttribute(NSAttributedStringKey.font, value: UIFont.systemFont(ofSize: 9), range: NSMakeRange(0, superScriptString.characters.count))
attributedText.addAttribute(NSAttributedStringKey.foregroundColor, value: UIColor.blue, range: NSMakeRange(0, superScriptString.characters.count))
let superscriptAttributedString = attributedText
let paragraph = NSMutableParagraphStyle()
paragraph.lineBreakMode = .byTruncatingTail
superscriptAttributedString.addAttribute(NSAttributedStringKey.paragraphStyle, value: paragraph, range: NSMakeRange(0, superscriptAttributedString.length))
return superscriptAttributedString
}
I gave the constraints to the Label like this,
Even though I set number of lines to 0 and no height constraint the label is truncating like this,
But when I don't use this line of code attributedText.addAttribute(NSAttributedStringKey.baselineOffset, value: 2, range: NSMakeRange(0, superScriptString.characters.count)) it is working fine like this,
And also if add * in the middle (without removing attributedText.addAttribute(NSAttributedStringKey.baselineOffset, value: 2, range: NSMakeRange(0, superScriptString.characters.count))) it works fine but just doesn't work if I use it in the beginning of the text,
Screen shot:
And it also works if I increase the font size.
I think there is an issue with NSAttributedString and if not I want to know what is the issue. Could someone please help me.
Your problem is as soon as you assign attributed string you have to re calculate the height. but there is a quick fix which you don't need to calculate it your self. give the label a force line break at the end of your label in which case it has to re calculate the height automatically.
// see the \n at the end of your string that will cause the label to recalculate it's height.
let nameText = "My name is Shreesha and Im an iOS developer. My name is Shreesha and Im an iOS developer."`My name is Shreesha and Im an iOS developer. My name is Shreesha and Im an iOS developer. \n"
I use NSAttributeString to set strike through on my text, I want it extend on whitespace.
I already set the correct range, but the strike through only cover the text characters. The strike through is ignore the whitespace unless I add some non-empty text before and after it.
How can I make the strike through extend on whitespace without extra text?
I have come across the same problem today, and neither existing answers gave me a solution I felt was as straightforward as it should be. After some research, I found a more concise solution using Unicode characters.
Padding each side of your text with one or more non-breaking Unicode space characters (U+00A0) extends the line as desired:
let attributedText = NSAttributedString(
string: "\u{00A0}\(someText)\u{00A0}",
attributes: [.strikethroughStyle: NSUnderlineStyle.single.rawValue]
)
I haven't found any solution but with your last option means adding first and last character as . with space you can try one thing. Either set the NSForegroundColorAttributeName of that first and last character to your background color of label or set the NSFontAttributeName with UIFont.systemFont(ofSize: 0.1). So it will be goes like this. You haven't specify your answer language so i'm posting answer in latest Swift 3.
let attributedText = NSMutableAttributedString(string: self.lbl.text!)
attributedText.addAttributes([NSStrikethroughStyleAttributeName: 2], range: NSMakeRange(0, self.lbl.text!.characters.count))
self.lbl.attributedText = attributedText
Before using NSForegroundColorAttributeName & NSFontAttributeName
Now you can use either NSForegroundColorAttributeName or NSFontAttributeName to hide first and last dot(.) character.
let attributedText = NSMutableAttributedString(string: self.lbl.text!)
attributedText.addAttributes([NSStrikethroughStyleAttributeName: 2], range: NSMakeRange(0, self.lbl.text!.characters.count))
attributedText.addAttributes([NSForegroundColorAttributeName: UIColor.white], range: NSMakeRange(0, 1))
attributedText.addAttributes([NSForegroundColorAttributeName: UIColor.white], range: NSMakeRange(self.lbl.text!.characters.count - 1, 1))
//Or either Set NSFontAttributeName instead of NSForegroundColorAttributeName
//attributedText.addAttributes([NSFontAttributeName: UIFont.systemFont(ofSize: 0.1)], range: NSMakeRange(0, 1))
//attributedText.addAttributes([NSFontAttributeName: UIFont.systemFont(ofSize: 0.1)], range: NSMakeRange(self.lbl.text!.characters.count - 1, 1))
self.lbl.attributedText = attributedText
After using NSForegroundColorAttributeName or NSFontAttributeName
For people coming to this question who only want a horizontal line through whitespace, this is the way to do it (Swift 4):
let line = String(repeating: "\u{23AF}", count: 10)
I've ported my app to XCode 8 and Swift 3 language syntax. Ever since doing so I've had lots of problems, setting a custom font being my current problem:
var sText = "Hello world, this is some text that I'm going to try to format ok?"
var attText = NSMutableAttributedString(string: sText)
var attrs = [NSFontAttributeName: UIFont(name: "Arial", size: 16)]
attText.addAttributes(attrs, range: NSMakeRange(0, sText.characters.count))
lblLabel1.attributedText = attText
So this code crashes every time with an "unrecognized selector sent to instance". Funny enough, setting other properties (like foreground color) work just fine... Just not fonts. I've tried custom fonts, system fonts, other named fonts... nothing seems to work. Anyone else run into this? Is there something I'm doing wrong here??? This code works fine in XCode 7 and even legacy Swift in XCode 8
Thanks in advance...
James
UIFont(name:) returns an Optional, so you have to unwrap it before use:
var sText = "Hello world, this is some text that I'm going to try to format ok?"
var attText = NSMutableAttributedString(string: sText)
if let arial = UIFont(name: "Arial", size: 16) {
var attrs = [NSFontAttributeName: arial]
attText.addAttributes(attrs, range: NSMakeRange(0, sText.characters.count))
// ...
}
Let say I have a text like this "By signing up I agree to the Terms of use and Privacy policy of Rue.Du.8 " inside a UITextField , I want to make the whole color Grey except "Terms of use" as white color . Is it possible to achieve into a UITextField?
Thanks in advance ...
You can do this using the attributedPlaceholder property, first create an AttributedString, like this.
var str = "By signing up I agree to the Terms of use and Privacy policy of Rue.Du.8"
var attributedString = NSMutableAttributedString(string: str)
attributedString.addAttribute(NSForegroundColorAttributeName, value: UIColor.grayColor(), range: (str as NSString).rangeOfString(str))
attributedString.addAttribute(NSForegroundColorAttributeName, value: UIColor.whiteColor(), range: (str as NSString).rangeOfString("Terms of use"))
self.textField.attributedPlaceholder = attributedString