ios - Swift:多次更改图像

Question

在我的应用程序中，我想在一个控件中显示多张图片，最后选择最后一张图片。以下代码运行良好，但仅显示最后一张图像。就像设置图片后页面不刷新一样。这是我的代码:

var num: UInt32 = 1
            let roll1: [UInt32] = [
                randRange(1,upper: 6),
                randRange(1,upper: 6),
                randRange(1,upper: 6),
                randRange(1,upper: 6),
                randRange(1,upper: 6),
                randRange(1,upper: 6),
                randRange(1,upper: 6),
                randRange(1,upper: 6)
            ]

for index in 0...7 {
                Dice1.hidden = true
                num = roll1[index]
                switch num
                {
                case 1:
                    Dice1.image = UIImage(named: "one.png")
                case 2:
                    Dice1.image = UIImage(named: "two")
                case 3:
                    Dice1.image = UIImage(named: "three")
                case 4:
                    Dice1.image = UIImage(named: "four")
                case 5:
                    Dice1.image = UIImage(named: "five")
                case 6:
                    Dice1.image = UIImage(named: "six")
                default:
                    Dice1.image = UIImage(named: "one.png")
                }
                Dice1.hidden = false
}

如何让图像显示到所有显示器？

Answer 1

你可以把它放在 for: 中代码的末尾:

sleep(0.5);