ios - 随机图像核心-点击按钮时显示背景

Question

我试图在点击按钮时生成随机图像，但是当我点击按钮时，两个图像都消失了，只有背景出现了。

这是我的代码:

@IBAction func PickerTapped(sender: UIButton) {

    //randomize a number for the first image

    var firstrandomNumber = arc4random_uniform(7) + 1

    //construct a string with a random number

    var firstLeftHandImageString: String = String(format: "rud%i", firstrandomNumber)

    // set the left hand image view to the asset corresponding to the randomized number

    self.LeftHandImageView.image = UIImage(named: "firstLeftHandImageString")

    //randomize a number for the second image

    var secondrandomNumber = arc4random_uniform(7) + 1

    //construct a string with a random number 

    var secondRightHandImageString: String = String(format: "rud%i", secondrandomNumber)

    //set the right hand image view to the asset corresponding to the randomized number

    self.RightHandImageView.image = UIImage(named: "secondRightHandImageString")
}

Answer 1

self.RightHandImageView.image = UIImage(named: "secondRightHandImageString")

从名为“secondRightHandImageString”的 Assets 创建图像

如果你想用你生成的字符串创建一个图像，你需要(注意变量名周围没有双引号)

self.RightHandImageView.image = UIImage(named: secondRightHandImageString)