如何快速确定并从带有数组的结构中提取正确的数据

Question

我有两个表格视图，它们根据所选单元格从数组中提取的数据填充。我引入了结构，最初只是使用字符串数组，我试图提取正确的数据并填充正确的字段他们。所以我有这个结构：

  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一个 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


}

在我的第二个表格视图中：

    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”，当我从上一个电视中选择一个单元格并尝试在上一个 VC 上显示数据时，应用程序崩溃。

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，您需要 2 个字符串，因此创建该结构。

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

您希望将它们组织为一个数组数组以匹配您的两个表。

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表的数据源，即...

var detailVcArray: [Detail]

最后一个控制器接收到它所需要的......

var displayDetail: Detail

此时您可以使用这些值。

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