Change the color of specific texts within an array of string. Swift

Question

How do you change the color of specific texts within an array of string that's going to be passed into a label?

Let's say I have an array of string:

var stringData = ["First one", "Please change the color", "don't change me"]

And then it's passed to some labels:

Label1.text = stringData[0]
Label2.text = stringData[1]
Label3.text = stringData[2]

What's the best approach to change the color of the word "the" in stringData[1]?

Thank you in advance for your help!

You can check this question out Use multiple font colors in a single label - Swift — hooliooo
– hooliooo, Commented Dec 8, 2016 at 3:53
Possible duplicate of Changing specific text's color using NSMutableAttributedString in Swift — haider_kazal
– haider_kazal, Commented Dec 8, 2016 at 5:29

jhd · Accepted Answer · 2016-12-08 04:02:07Z

4

let str = NSMutableAttributedString(string: "Please change the color")
str.addAttributes([NSForegroundColorAttributeName: UIColor.red], range: NSMakeRange(14, 3))
label.attributedText = str

The range is the range of the specific text.

answered Dec 8, 2016 at 4:02

jhd

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Code Different · Accepted Answer · 2016-12-08 04:26:08Z

If you want to change the color of all the in your string:

func highlight(word: String, in str: String, with color: UIColor) -> NSAttributedString {
    let attributedString = NSMutableAttributedString(string: str)
    let highlightAttributes = [NSForegroundColorAttributeName: color]

    let nsstr = str as NSString
    var searchRange = NSMakeRange(0, nsstr.length)

    while true {
        let foundRange = nsstr.range(of: word, options: [], range: searchRange)
        if foundRange.location == NSNotFound {
            break
        }

        attributedString.setAttributes(highlightAttributes, range: foundRange)

        let newLocation = foundRange.location + foundRange.length
        let newLength = nsstr.length - newLocation
        searchRange = NSMakeRange(newLocation, newLength)
    }

    return attributedString
}

label2.attributedText = highlight(word: "the", in: stringData[1], with: .red)

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