Bring drawing UIView in front of image - swift

Question

I'm trying to code an app which in part involves using one's finger to trace an object in a photograph. I've got two relevant files:
import UIKit
class SecondViewController: UIViewController {
#IBOutlet weak var image_edit: UIImageView!
var rec_houseimages: [UIImage]?
override func viewDidLoad() {
super.viewDidLoad()
image_edit.image = rec_houseimages?[0]
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
and this one:
import UIKit
class Draw: UIView {
var touch : UITouch!
var lineArray : [[CGPoint]] = [[CGPoint]()]
var index = -1
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
touch = touches.first! as UITouch
let lastPoint = touch.location(in: self)
index += 1
lineArray.append([CGPoint]())
lineArray[index].append(lastPoint)
}
override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
touch = touches.first! as UITouch
let currentPoint = touch.location(in: self)
self.setNeedsDisplay()
lineArray[index].append(currentPoint)
}
override func draw(_ rect: CGRect) {
let context = UIGraphicsGetCurrentContext()
if(index >= 0){
context!.setLineWidth(5)
context!.setStrokeColor((UIColor(red:0.00, green:0.38, blue:0.83, alpha:1.0)).cgColor)
context!.setLineCap(.round)
var j = 0
while( j <= index ){
context!.beginPath()
var i = 0
context?.move(to: lineArray[j][0])
while(i < lineArray[j].count){
context?.addLine(to: lineArray[j][i])
i += 1
}
context!.strokePath()
j += 1
}
}
}
When I run my program, I get my desired image placed on the screen and the drawing code executes fine; but the image is in front of the drawing so that you can only see the lines if you draw outside of the image. I've been looking up things like bringSubviewToFront but I'm not sure how to implement them with this drawing stuff.