I'm wondering how to make colorful string.
What I mean is:
I will need string to be for example
FirstLetter - white, second - blue, third - red , forth - orange , fifth - white and so on so in loop.
I googled this line of code:
myMutableString.addAttribute(NSForegroundColorAttributeName, value: UIColor.redColor(), range: NSRange(location:2,length:4))
but it gets location and length, but how to make changing color in specified order?
try this:
let color : [UIColor] = [.white, .blue, .red, .orange]
let plainString = "Hello World"
let str = NSMutableAttributedString(string: plainString)
for var i in 0..<plainString.characters.count {
let range = NSMakeRange(i, 1)
let newColor = color[i % color.count]
str.addAttribute(NSForegroundColorAttributeName, value: newColor, range: range)
}
You can use this:
let text = NSMutableAttributedString(string: "ABC")
text.addAttribute(NSForegroundColorAttributeName, value: UIColor.redColor(), range: NSMakeRange(0, 1))
text.addAttribute(NSForegroundColorAttributeName, value: UIColor.yellowColor(), range: NSMakeRange(1, 2))
thelabel.attributedText = text
This method will do it for you (Correct for Swift 3/Xcode 8)
import UIKit
var str = "Hello, playground"
func colorText(str:String,textColors:[UIColor])->NSMutableAttributedString {
let myMutableString = NSMutableAttributedString(string: str)
var charNum = 0
repeat {
for color in textColors {
if charNum>=myMutableString.length {
return myMutableString
}
myMutableString.addAttribute(NSForegroundColorAttributeName, value: color, range: NSRange(location:charNum,length:1))
charNum+=1
}
} while true
}
let coloredText = colorText(str: str,textColors:[.white,.blue,.red,.orange])
