My SKSpriteNode wouldn't show even though I used addChild in swift

I tried to add an image to my Game Scene, but it won't appear. Below is my code. I hope you guys can help me

import SpriteKit
import GameplayKit

class GameScene: SKScene {
    var Ground = SKSpriteNode()
    var iceCream = SKSpriteNode()
    override func didMove(to view: SKView) {
        Ground = SKSpriteNode(imageNamed: "background")
        Ground.setScale(0.5)
        Ground.position = CGPoint(x: self.frame.width / 2, y: self.Ground.frame.height / 2)
        self.addChild(Ground)
        iceCream = SKSpriteNode(imageNamed: "VanillaIceCream")
        iceCream.size = CGSize(width: 60, height: 70)
        iceCream.position = CGPoint(x: self.iceCream.frame.width, y: self.frame.height / 2)
        self.addChild(iceCream)
    }

    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {

    }
    override func update(_ currentTime: CFTimeInterval) {

    }
}

When you set position tox: self.iceCream.frame.width you position it using iceCream. I believe that changing it to x: self.frame.width / 2 will solve it. If it is not mistake and you want to set the iceCream on the left of the screen, position the sprite after adding it to self. It's also good to set zPosition to each element, to make sure it will not hide behind the background image.

EDIT: Here is the full code for your method (ready to copy/paste):

Ground = SKSpriteNode(imageNamed: "background")
self.addChild(Ground)
Ground.setScale(0.5)
Ground.position = CGPoint(x: self.frame.width / 2, y: self.frame.height / 2)
Ground.zPosition = 1.0

iceCream = SKSpriteNode(imageNamed: "VanillaIceCream")
self.addChild(iceCream)
iceCream.size = CGSize(width: 60, height: 70)
iceCream.position = CGPoint(x: self.frame.width / 2, y: self.frame.height / 2)
iceCream.zPosition = 2.0