ios - 随机数语句不适用于我的 toInt 文本字段输入

Question

以下错误:无法使用类型为“(@lvalue Int?, @lvalue UInt32)”的参数列表调用“==”

@IBOutlet weak var textBox: UITextField!

@IBOutlet weak var result: UILabel!

@IBAction func submit(sender: AnyObject) {
    var randomNumber = arc4random_uniform(4)+1//look at the first if declaration. This is were my question is
    var guess = textBox.text.toInt()
    if guess == randomNumber {             //error: Cannot invoke '==' with an argument list of type '(@lvalue Int?, @lvalue UInt32)
        guess.text = "Well done, correct!"
    }
    else if guess < 0 {
        guess.text = "WHAT!?!? that wasn't even an option"
    }
    else if guess > 5 {
        guess.text = "WHAT!?!? that wasn't even an option"
    }
    else {
        guess.text = "WRONG the correct answer was \(randomNumber)"
    }

请告诉我为什么在 arcforrandom 中使用 == 会出错，以及我如何解决这个问题并让它按我想要的方式运行。非常感谢所有答案

Answer 1

将 Uint 转换为 Int

var randomNumber = Int( arc4random_uniform(4)+1 )

和..

为什么 guess.text 你的意思是 result.text？