checkerBoard.swift

func checkerBoard(){ //產生出遊戲題目
        //亂數
        let shuffledDistribution = GKShuffledDistribution(lowestValue: 0, highestValue: imageName.count - 1)
        var count = 0;
        for i in 0...5{
            let index1  = shuffledDistribution.nextInt()
            let index2  = shuffledDistribution.nextInt()
            let index3  = shuffledDistribution.nextInt()
            let index4  = shuffledDistribution.nextInt()
            AllCard[count].setBackgroundImage(UIImage(named: imageName[index1]), for: .normal)
            count += 1
            
            AllCard[count].setBackgroundImage(UIImage(named: imageName[index2]), for: .normal)
            count += 1
            
            AllCard[count].setBackgroundImage(UIImage(named: imageName[index3]), for: .normal)
            count += 1

            AllCard[count].setBackgroundImage(UIImage(named: imageName[index4]), for: .normal)
            count += 1
        }
    }