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iOS

CGrect using swift

hello!!

I am trying to make a rectangle in swift, and i have the function and everything but i dont know how i can get the function to show on my screen? If anyone can help it would be awesome!! Thanks in advance!

here is my code:

import UIKit

class ViewController: UIViewController {

var swipeColour = UIColor(red: 42/255, green: 45/255, blue: 56/255, alpha: 100)

override func viewDidLoad() {
    super.viewDidLoad()
    view.backgroundColor = swipeColour

    var boxPoint = CGPoint(x: 200, y: 100)
    var boxSize = CGSize(width: 365, height: 124)
    var boxRect = CGRect(origin: boxPoint, size: boxSize)
    box(boxRect)


    // Do any additional setup after loading the view, typically from a nib.
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.

}


func box(rect:CGRect){
    let ctx = UIGraphicsGetCurrentContext()
    let width = rect.width
    let height = rect.height
    var pstyleRightAlign = NSMutableParagraphStyle()
    pstyleRightAlign.alignment = NSTextAlignment.Right
    var pstyleLeftAlign = NSMutableParagraphStyle()
    pstyleLeftAlign.alignment = NSTextAlignment.Left
    var pstyleCenterAlign = NSMutableParagraphStyle()
    pstyleCenterAlign.alignment = NSTextAlignment.Center
}

}