swift - 猜测后重新生成随机数

Question

我有一个猜谜游戏应用程序，用户尝试猜测正确的数字。到目前为止，除了重置按钮之外，我一切正常，以便用户可以再次玩游戏。在我的重置按钮功能中，我将其设置回图像和标签文本，以便用户重新开始游戏，但它似乎不想再次获得新的随机数，它只是使用相同的数字。

这就是我到目前为止所拥有的......

let randomNumber = arc4random_uniform(100)//gets random number

func randomGuess()    {
    let userGuess = Int(guess.text!)
    print(randomNumber)
    if(userGuess != nil)    {
        if(Int(randomNumber) == userGuess)  {
            lblResult.text = "You win!"
            imgCandy.image = UIImage.animatedImage(with:images, duration: 1)
        } else  {
            if(Int(randomNumber) < userGuess!)   {
                lblResult.text = "Too high - guess again!"
                imgCandy.image = UIImage(named: "tooHigh.png")
            } else  {
                lblResult.text = "Too low - guess again!"
                imgCandy.image = UIImage(named: "tooLow.png")
            }
        }
    } else  {
        lblResult.text = "A number from 0-99 is required"
        imgCandy.image = UIImage(named: "gumballs.jpg")
    }
}

@IBAction func btnGuess(_ sender: Any) {
    randomGuess()
}

@IBAction func btnReset(_ sender: Any) {
    imgCandy.image = UIImage(named: "gumballs.jpg")
    lblResult.text = "Ready? Pick a number from 0-99"
    randomGuess()
}

Answer 1

您的randomNumber是一个let常量，因此它被设置一次并且永远不会改变。将其更改为 var:

var randomNumber = arc4random_uniform(100)

然后在 btnReset(_:) 函数中再次设置:

@IBAction func btnReset(_ sender: Any) {
    imgCandy.image = UIImage(named: "gumballs.jpg")
    lblResult.text = "Ready? Pick a number from 0-99"
    randomNumber = arc4random_uniform(100)
    randomGuess()
}