NSMutableAttributedString Implementation

GenerateMultipleColorString.swift

import UIKit

extension NSMutableAttributedString {
    
    func generateMultipleColorString(sentences: [String], colors: [UIColor]) -> NSMutableAttributedString? {
        
        let attributedText = NSMutableAttributedString()
        var count = 0
        while count < sentences.count {
            let minAttr = NSMutableAttributedString(string: sentences[count])
            minAttr.addAttribute(NSAttributedStringKey.foregroundColor, 
                                 value: colors[count], 
                                 range: NSMakeRange(0, minAttr.length))
            
            attributedText.append(minAttr)
            count += 1
        }
        
        //Center align
        let paragraphStyle = NSMutableParagraphStyle()
        paragraphStyle.alignment = .center
        
        attributedText.addAttribute(NSAttributedStringKey.paragraphStyle, 
                                    value: paragraphStyle, 
                                    range: NSMakeRange(0, attributedText.length))
        
        return attributedText
    }
}