Print the first character of a string in a color circle

The following code is written with Xcode 7.1 (Swift 2.1) and tested with Xcode 6.4 (Swift 1.2). The first character of a string is printed in a color circle.

ViewController.swift:

import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {

        super.viewDidLoad()

        

        let offsetY : CGFloat = 100

        let labelCircleX : CGFloat = 100

        let labelX : CGFloat = 200

        

        let colorArray = [UIColor.orangeColor(), UIColor.blueColor(), UIColor.redColor()]

        let stringArray = ["Apple", "蘋果", "tv"]

        //Strings can include Unicode chacters.

        //The Apple logo character  can be typed using [option]+[shift]+[K]
        //Unfortunately, the Apple logo character  cannot be seen in windows.

        

        for item in 0...2 {

            

            //Convert Int item to CGFloat using CGFloat(item).

            let labelCircleY : CGFloat = offsetY*CGFloat(item+1)

            let labelY : CGFloat = labelCircleY + 20

            createCharacterInCircle(labelCircleX, y: labelCircleY, text: stringArray[item], color: colorArray[item])

            createLabel(labelX, y: labelY, text: stringArray[item])

        }

    }

    

    func createCharacterInCircle(x: CGFloat, y: CGFloat, text: String, color: UIColor) {

        

        //Get the first character of string "text" and convert it to string.

        //"text" can be a string with Unicode characters.

        let firstChar = "\(text.characters.first!)" //Swift 2.1

        //let firstChar = "\(Array(text)[0])" //Swift 1.2

        

        let labelCircleSize : CGFloat = 70

        let labelCircle = UILabel(frame: CGRectMake(x, y, labelCircleSize, labelCircleSize))

        

        //Color Settings

        labelCircle.backgroundColor = color

        labelCircle.textColor = UIColor.whiteColor()

        

        //Text Settings

        labelCircle.text = firstChar

        labelCircle.font = UIFont(name: ".HelveticaNeueInterface-Bold", size: 30)

        labelCircle.textAlignment = NSTextAlignment.Center

        

        //Circle Settings

        labelCircle.layer.cornerRadius = labelCircleSize/2

        labelCircle.layer.masksToBounds = true

        

        //Border Settings

        labelCircle.layer.borderColor = UIColor.blackColor().CGColor

        labelCircle.layer.borderWidth = 3

        view.addSubview(labelCircle)

    }

    

    func createLabel(x: CGFloat, y: CGFloat, text: String) {

        let label = UILabel(frame: CGRectMake(x, y, 100, 25))

        label.text = text

        view.addSubview(label)

    }

    override func didReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()

    }

}

Result: