Question

我现在设置了我的系统，将答案放在4个选项中的1个中，但出现了一个奇怪的错误：

     var optionAnswer:UInt32 = arc4random_uniform(4)
if optionAnswer == 0 {                    // Expected declaration
   optionA.text = secretAnsarrrrr.text
}
if optionAnswer == 1 {
   optionB.text = secretAnsarrrrr.text
}
if optionAnswer == 2 {
   optionC.text = secretAnsarrrrr.text
}
if optionAnswer == 3 {
   optionD.text = secretAnsarrrrr.text
}

错误仅出现在第一个条件上，并没有指定我需要做什么。我该如何解决？

完整代码：

     import UIKit

    class ViewController: UIViewController {

@IBOutlet var numA: UILabel!
@IBOutlet var operation: UILabel!
@IBOutlet var numB: UILabel!
@IBOutlet var secretAnsarrrrr: UILabel!

@IBOutlet var optionA: UILabel!
@IBOutlet var optionB: UILabel!
@IBOutlet var optionC: UILabel!
@IBOutlet var optionD: UILabel!

@IBOutlet var level: UILabel!
@IBAction func startTest(sender: UIButton) {
    var question:Int = 1
    func generateQuestion() {
        var answer:Float = 0.0
        var randomoperation:UInt32 = arc4random_uniform(4)
        if randomoperation == 0 {
            operation.text = "+"
        }
        if randomoperation == 1 {
            operation.text = "-"
        }
        if randomoperation == 2 {
            operation.text = "X"
        }
        if randomoperation == 3 {
            operation.text = "/"
        }
        var randomNumber:UInt32 = arc4random_uniform(1000)
        var randomNumber2:UInt32 = arc4random_uniform(1000)
        // 1000 is my maximum number for now.
        randomNumber += 1
        randomNumber2 += 1
        func identifyVal() {
            if randomNumber < randomNumber2 {
                var between:UInt32 = 1000 - randomNumber2
                randomNumber = randomNumber2 + arc4random_uniform(between - 1)
                //making sure that randomNumber is not smaller than randomNumber2, therefore all results are positive.
            }
        }
        if operation.text == "/" {
            identifyVal()

            answer = round(Float(randomNumber)/Float(randomNumber2))
        }

        if operation.text == "+" {
            answer = Float(randomNumber + randomNumber2)
        }
        if operation.text == "-" {
            identifyVal()
            answer = Float(randomNumber - randomNumber2)
        }
        if operation.text == "x" {
            answer = Float(randomNumber * randomNumber2)
        }
        secretAnsarrrrr.text = "\(answer)"
        numA.text = String(Int(randomNumber))
        numB.text = String(Int(randomNumber2))
    }
    generateQuestion()
}
var optionAnswer:UInt32 = arc4random_uniform(4)
if optionAnswer == 0 {
optionA.text = secretAnsarrrrr.text
}
if optionAnswer == 1 {
optionB.text = secretAnsarrrrr.text
}
if optionAnswer == 2 {
optionC.text = secretAnsarrrrr.text
}
if optionAnswer == 3 {
optionD.text = secretAnsarrrrr.text
}
var correct:Bool?
@IBAction func answerA(sender: UIButton) {
    if optionAnswer == 0 {
        correct = true
    } else {
        correct = false
    }
}
@IBAction func answerB(sender: UIButton) {
    if optionAnswer == 1 {
        correct = true
    } else {
        correct = false
    }
}
@IBAction func answerC(sender: UIButton) {
    if optionAnswer == 2 {
        correct = true
    } else {
        correct = false
    }
}
@IBAction func answerD(sender: UIButton) {
    if optionAnswer == 3 {
        correct = true
    } else {
        correct = false
    }
}

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

}

Answer 1

远射 - 但是你之前在那条线上擦除了一个功能吗？如果是这样，请注释掉第一行，然后删除“//”。 Xcode有时会感到困惑。

备注：使用开关可能会更好。另外，考虑将它放在一个结构中，这将允许您定义一个方法randomAnswer（），它作用于问题，然后在视图中引用该方法。你也可以把不同的选项作为枚举，只有4个。：）

预期的条件声明声明

1 个答案: