Way #1:

        diceImageView1.image = [ #imageLiteral(resourceName: "DiceOne"), #imageLiteral(resourceName: "DiceTwo"), #imageLiteral(resourceName: "DiceThree"), #imageLiteral(resourceName: "DiceFour"), #imageLiteral(resourceName: "DiceFive"), #imageLiteral(resourceName: "DiceSix") ][Int.random(in: 0...5)]
        diceImageView2.image = [ #imageLiteral(resourceName: "DiceOne"), #imageLiteral(resourceName: "DiceTwo"), #imageLiteral(resourceName: "DiceThree"), #imageLiteral(resourceName: "DiceFour"), #imageLiteral(resourceName: "DiceFive"), #imageLiteral(resourceName: "DiceSix") ][Int.random(in: 0...5)]

Way #2:

        let diceArray = [ #imageLiteral(resourceName: "DiceOne"), #imageLiteral(resourceName: "DiceTwo"), #imageLiteral(resourceName: "DiceThree"), #imageLiteral(resourceName: "DiceFour"), #imageLiteral(resourceName: "DiceFive"), #imageLiteral(resourceName: "DiceSix") ]
        
        diceImageView1.image = diceArray.randomElement()
        diceImageView2.image = diceArray.randomElement()