Multicolour Text in Swift

问题

Can you please help me, I tried to make multicolour text but I get a SIGABRT error but absolutely don't know from were it comes from. Here's the code:

class ViewController: UIViewController {    

@IBOutlet weak var ColoredTxt: UILabel!
override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
    var Timer = NSTimer.scheduledTimerWithTimeInterval(0.1, target: ColoredTxt, selector: Selector("ColoredTxt"), userInfo: nil, repeats: true)

}


@IBAction func Btn(sender: AnyObject) {

    let redValue = CGFloat(drand48())
    let greenValue = CGFloat(drand48())
    let blueValue = CGFloat(drand48())

    ColoredTxt.textColor = UIColor(red: redValue, green: greenValue, blue: blueValue, alpha: 1.0)
}


func randomColor() {

    let redValue = CGFloat(drand48())
    let greenValue = CGFloat(drand48())
    let blueValue = CGFloat(drand48())

    ColoredTxt.textColor = UIColor(red: redValue, green: greenValue, blue: blueValue, alpha: 1.0)

    }
}

回答1:

You need something like this, using NSMutableAttributedString allow you do things like this

Here is the code

   func multicolorString(originalString : String) ->NSMutableAttributedString
    {
        let mutableString = NSMutableAttributedString(string: originalString)

        for index in 0..<originalString.characters.count
        {
            if(index % 2 == 0)
            {
                mutableString.addAttribute(NSForegroundColorAttributeName, value: UIColor.green, range: NSMakeRange(index, 1))
            }else if(index % 3 == 0)
            {
                mutableString.addAttribute(NSForegroundColorAttributeName, value: UIColor.blue, range: NSMakeRange(index, 1))
            }else{
                mutableString.addAttribute(NSForegroundColorAttributeName, value: UIColor.red, range: NSMakeRange(index, 1))
            }
        }

        return mutableString
    }

and then use like this

self.ColoredTxt.attributedText = self.multicolorString("Owner")

I hope this helps you

回答2:

func getAttribute(_ array: [[String: UIColor]]) -> NSAttributedString {
    let attributedString = NSMutableAttributedString(string: "" )

    for item in array {
        let text = item.keys.first ?? ""
        let color = item.values.first ?? UIColor.black
        let attributed = NSMutableAttributedString(string: text, attributes: [NSForegroundColorAttributeName : color])
        attributedString.append(attributed)
    }

    return attributedString
}

Usage:

let attributedString = getAttribute([["H" : UIColor.black], ["i" : UIColor.gray]])
button.setAttributedTitle(attributedString, for: .normal)
label.attributedText = attributedString

来源：https://stackoverflow.com/questions/42306760/multicolour-text-in-swift

标签

ios

swift

text

sigabrt