我需要使用数组将数据从 UITableViewController 传递到 UIViewController

Posted 2023-03-03

【中文标题】我需要使用数组将数据从 UITableViewController 传递到 UIViewController

【英文标题】：I need to pass data from UITableViewController to UIViewController using Array

【发布时间】：2018-08-08 13:34:48

【问题描述】：

这是我第一次构建自己的应用程序，我需要帮助，该应用程序是关于测验的。

应用有很多素材，每种素材都有很多测验，这是QuizzesVC

我想从 QuizzesArray 传递数据（代码在下面） 到 QuestionVC

例如，当点击数学部分中的 Quiz 1 单元格时，QuestionVC 应显示数学数组的第一部分：

[Quiz(title: "Quiz1", ques: "1+2", choiceA: "3", choiceB: "2", choiceC: "4", correctAnswer: choiceA)]

QuizzesVC代码：

class QuizesVC: UITableViewController 

//...


override func viewDidLoad() 
    super.viewDidLoad()
    navigationItem.title = "Quizes"
    navigationController?.navigationBar.prefersLargeTitles = true


// MARK: - Table view data source



override func numberOfSections(in tableView: UITableView) -> Int 
    //...
    
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int 

    //...

override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? 
    //...


override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell 
    //...

override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) 

这是 QuestionVC 代码：

    class QuestionVC : UIViewController 
    @IBOutlet var questionLabel: UILabel!//QuizzesArray: ques
    @IBOutlet var choiceAButton: UIButton!//QuizzesArray: choiceA
    @IBOutlet var choiceBButton: UIButton!//QuizzesArray: choiceB
    @IBOutlet var choiceCButton: UIButton!//QuizzesArray: choiceC

这是QuizzesArray的代码：

class QuizzesArray 
var mathQuizes = [[Quiz(title: "Quiz1", ques: "1+2", choiceA: "3", choiceB: "2", choiceC: "4", correctAnswer: choiceA)],
[Quiz(title: "Quiz2", ques: "1+2", choiceA: "3", choiceB: "2", choiceC: "4", correctAnswer: choiceA)],
[Quiz(title: "Quiz3", ques: "1+2", choiceA: "3", choiceB: "2", choiceC: "4", correctAnswer: choiceA)],
[Quiz(title: "Quiz4", ques: "1+2", choiceA: "3", choiceB: "2", choiceC: "4", correctAnswer: choiceA)],
[Quiz(title: "Quiz5", ques: "1+2", choiceA: "3", choiceB: "2", choiceC: "4", correctAnswer: choiceA)],
[Quiz(title: "Quiz6", ques: "1+2", choiceA: "3", choiceB: "2", choiceC: "4", correctAnswer: choiceA)]
]
var chemistryQuizes = [[Quiz(title: "Quiz1", ques: "1+2", choiceA: "3", choiceB: "2", choiceC: "4", correctAnswer: choiceA)],
                           [Quiz(title: "Quiz2", ques: "1+2", choiceA: "3", choiceB: "2", choiceC: "4", correctAnswer: choiceA)],
                           [Quiz(title: "Quiz3", ques: "1+2", choiceA: "3", choiceB: "2", choiceC: "4", correctAnswer: choiceA)],
                           [Quiz(title: "Quiz4", ques: "1+2", choiceA: "3", choiceB: "2", choiceC: "4", correctAnswer: choiceA)],
                           [Quiz(title: "Quiz5", ques: "1+2", choiceA: "3", choiceB: "2", choiceC: "4", correctAnswer: choiceA)]
    ]

struct Quiz 
var title : String
var ques : String
var choiceA : String
var choiceB : String
var choiceC : String
var correctAnswer : Int

如果您需要更多解释，请告诉我。

【参考方案1】：

在 didSelectRowAt 中你可以得到单元格的索引：

let itemToPass = mathQuizes[indexPath.row]

比执行你的转场：

performSegue(withIdentifier: "yourSegue", sender: itemToPass)

我在上面解释过的完整代码：

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) 
    let itemToPass = mathQuizes[indexPath.row]
    performSegue(withIdentifier: "yourSegue", sender: itemToPass)

所以您现在已经准备好使用

将您的项目传递给您的下一个视图控制器

override func prepare(for segue: UIStoryboardSegue, sender: Any?)  
     if segue.identifier == "yourSegue" 
        if let quiz = sender as? Quiz 
           let destination = segue.destination as! NextViewController
           destination.quiz = quiz 
        
     

【讨论】：

谢谢Alstar，但我还是初学者，请您详细说明一下

他们在这一行显示错误destination.quiz = quiz // Value of type 'QuestionVC' has no member 'quiz'

当然，这只是一个例子，你必须像这样在你的 nextviewcontroller 中设置一个变量：var quiz: Quiz!，然后你才能使用你的 destination.quiz