如何确定并从 swift 中具有数组的结构中提取正确的数据

Question

我有两个 table 视图，这些视图是根据单元格从数组中提取的数据填充的 chosen.I 引入了结构，最初只是使用字符串数组，我正在尝试提取正确的数据并用 them.So 填充正确的字段我有这个结构：

  struct DetailView {
    var detailTitle : String
    
    //var equipmentImage = [UIImageView?]()
    var serN : String
    var dc : String //deck Code
    var an : String  //area name
    var sn : String   //Space number
    var manuf : String
    var qty : String
    
    init(detailTitle:String,dc:String,serN:String,an:String,sn:String,manuf:String,qty:String){
        self.detailTitle = detailTitle
        self.dc = dc
        self.an = an
        self.serN = serN
        self.sn = sn
        self.manuf = manuf
        self.qty = qty
//
    }
}

我有这个数组：

    //we are adding elements on the detailView structure

    var thirdArray : [DetailView]= []

我填充它：

    thirdArray = thirdArray = [[
                    DetailView(detailTitle: "A", dc: "", serN: "Info required", an: "Area Name required", sn: "Space Number Required", manuf: "APC", qty: "2")],
                    
                    [DetailView(detailTitle: "B", dc: "", serN: "Info required", an: "Area Name required", sn: "Space Number Required", manuf: "Apple", qty: "12"),
                    DetailView(detailTitle: "D", dc: "", serN: "Info required", an: "Area Name required", sn: "Space Number Required", manuf: "Apple", qty: "7"),
                    DetailView(detailTitle: "E", dc: "", serN: "Info required", an: "Area Name required", sn: "Space Number Required", manuf: "Apple", qty: "1")],
                    
                    
                    [DetailView(detailTitle: "F", dc: "", serN: "Info required", an: "Area Name required", sn: "Space Number Required", manuf: "Autonomic", qty: "1")]]

然后我在填充它们的地方执行 segue:

    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    
            let row = self.tableView?.indexPathForSelectedRow?.row ?? 0
            let destViewController = segue.destination as! SecondTableViewController
           var detailArray : [DetailView]
           detailArray = thirdArray
destViewController.detailVcArray = detailArray


}

在我的第二个 table 视图中，我有：

    var detailVcArray : [DetailView] = []


     override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
             let destViewController = segue.destination as! DetailsViewController
             let row = self.tableView?.indexPathForSelectedRow?.row ?? 0
           


    var lastArray : [DetailView]
    lastArray = detailVcArray
    
    
    destViewController.displayDetail = lastArray[row]
         //here I get this error "Thread 1: Fatal error: Index out of range"   
        }

最后，在我的 DetailsViewController 上，我想用我的结构中的 dc 数据填充 dc textField，用 detailTitle 等填充 textView。但是应用程序崩溃了。

      var displayDetail : DetailView?
        @IBOutlet weak var textView: UITextView!
        @IBOutlet weak var serN: UITextField!
        @IBOutlet weak var dc: UITextField!
        @IBOutlet weak var an: UITextField!
        @IBOutlet weak var sn: UITextField!
        @IBOutlet weak var manuf: UITextField!
        @IBOutlet weak var qty: UITextField!
        
            
         override func viewDidLoad() {
                super.viewDidLoad()
    
    textView.text = displayDetail?.detailTitle
        dc.text = displayDetail?.dc
        serN.text = displayDetail?.serN
        an.text = displayDetail?.an
        sn.text = displayDetail?.sn
        manuf.text = displayDetail?.manuf
        qty.text = displayDetail?.qty
         updateTextView()
                }

我收到此错误“线程 1：致命错误：索引超出范围”，当我从我的最后一台电视中选择一个单元格并尝试在我的最后一台 VC 上显示数据时，应用程序崩溃了。 =17=]

Answer 1

我建议围绕您需要显示的内容重新设计您的数据模型。最后，你想要 2 个字符串，所以创建那个结构。

struct Detail {
    var detailTitle: String
    var dc: String
}

您想将它们组织成数组数组以匹配您的两个 table。

let detailArray = [[Detail(detailTitle: "A", dc: "BO")],
    [Detail(detailTitle: "B", dc: "Apple"), Detail(detailTitle: "C", dc: "Apple"), Detail(detailTitle: "D", dc: "Apple")],
    [Detail(detailTitle: "A", dc: "BD")]
    //  ...
]

您的 segue 选择了正确的数组并将其传递给第二个 table 的数据源，即...

var detailVcArray: [Detail]

最后一个控制器收到它需要的东西...

var displayDetail: Detail

届时您可以使用这些值。

    textView.text = displayDetail.detailTitle
    dc.text = displayDetail.dc

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