如何将对与数组连接以包含相同的索引？

我正在为iOS开发一个测验应用程序，并将问题保存在一个数组中，并将答案保存在另一个数组中。到目前为止，我已经能够用arc4random从问题数组中获得一个随机问题。但是，当我尝试设置按钮以显示随机答案选项时，它们与指定的问题不匹配。例如，question数组中index = 0处的问题与answers数组中index = 0处的answer数组一致，因此。如何随时随地产生正确的答案（换句话说，我如何确保它们都始终具有由arc4random方法或任何方法拉取的匹配索引）？如何将对与数组连接以包含相同的索引？

下面是我的一些代码：

//random question generation function 
func randomQuestion() { 
    index = Int(arc4random_uniform(UInt32(questions.count))) 
    questionLabel.text = questions[index] 

let questions = ["Who is Thor's half brother?", "What is the name of Thor's hammer?", "What is Thor's father name?"] 

//Each correct answer is placed at index 0 (right answers are Atum, Mjolinr, & Odin) 
var answers = [["Atum", "Loki", "Red Norvell", "Kevin Masterson"], ["Mjolinr", "Uru", "Stormbreaker", "Odin's Staff"], ["Odin, "Sif", "Heimdall", "Balder"]] 


//This variable is used in a later function that helps randomize wear the correct answer will be placed randomly from a set of buttons 
var rightAnswerBox:UInt32 = 0 


IBAction func buttonAction(_ sender: AnyObject) { 

if (sender.tag == Int(rightAnswerBox)) { 



print ("Correct!") 
} 

else { 

    wrongSeg() 
print ("Wrong!") 

    } 

    if (currentQuestion != questions.count) 
    { 
     newQuestion() 
    } 
} 



override func viewDidAppear(_ animated: Bool) 
{ 
newQuestion() 


} 




//function that displays new question 
func newQuestion() 
{ 

//countdown timer section 




randomQuestion() 

rightAnswerBox = arc4random_uniform(4)+1 

//create a button 
var button:UIButton = UIButton() 

var x = 1 

for index in 1...4 
{ 
    //creat a button 
    button = view.viewWithTag(index) as! UIButton 

    if (index == Int(rightAnswerBox)) 
    { 
     button.setTitle(answers[currentQuestion][0], for: .normal) 



    } 

    else { 




     button.setTitle(answers[currentQuestion][x], for: .normal) 

    x += 1 
     } 
} 


currentQuestion += 1

}

来源

2017-07-19 Captain Code

而不是数组答案，你可以把问题的词典作为关键和答案作为价值！ –

你可以随机化一本字典吗？ –

我还没试过。但我瘦，你可以随机排列字典键。 –

使用Dictionary分配的答案的适当的问题。

let QADictionary = ["Who is Thor's half brother?" : ["Atum", "Loki", "Red Norvell", "Kevin Masterson"],"What is the name of Thor's hammer?": ["Mjolinr", "Uru", "Stormbreaker", "Odin's Staff"], "What is Thor's father name?" : ["Odin", "Sif", "Heimdall", "Balder"] ] 


//Get question list 
let questionsList = Array(QADictionary.keys) 
// Random question index 
let index = Int(arc4random_uniform(UInt32(questionsList.count))) 
// Fetch question from list 
let question = questionsList[index] 
// Assign to label 
questionLabel.text = question 

//Get the answer for the randomly chosen question. Because you question is the `Key` for the dictionary. 
let answer = QADictionary[question]

来源

2017-07-19 09:31:33 Subramanian

有没有办法分别访问密钥的每个值？就像我想单独设置每个答案值到一个按钮一样？（所以我会有四个按钮，每个显示与问号键配对的答案值） –

@CaptainCode'let answer = QADictionary [question]'会给你答案数组。迭代数组以获取问题的值。 'questionLabel.text'有你的问题，那就是你的字典的关键。 – Subramanian

您可以通过使用我作为示例给出的代码来举个例子吗？我仍然困惑于我将如何访问每个键（问题）的每个值（答案） –

@Saurabh Prajapati的建议是正确的为您的要求。

Step1：首先将您的问题和解答存储在字典中。

第2步：使用字典的关键字组成数组，如下所示。

例如，你的字典名称是quizDic。

var questionsArray = quizDic.keys.Array

第三步：找到你questionsArray数和值传递给随机生成的函数。

第4步：然后根据从questionsArray中随机选择的密钥，从quizDic访问您正确的答案。

来源

2017-07-19 09:31:38

如何将对与数组连接以包含相同的索引？

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