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

Question

这是我第一次构建自己的应用程序并且需要帮助，该应用程序与Quizzes有关。

该应用程序包含许多材料，每种材料都有许多Quizzes，这是 QuizzesVC

我想从 QuizzesArray 传递数据（下面的代码）  到 QuestionVC

例如，当在“数学”部分中轻按“测验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
}

如果您需要更多说明，请告诉我。

Answer 1

在didSelectRowAt中，您可以获得单元格的索引，因此：

let itemToPass = mathQuizes[indexPath.row]

比执行您的搜寻更重要：

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

我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)
}

因此，您现在可以使用

将项目传递到下一个视图控制器。

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 
        }
     }
}