来自对象数组的 UITableViewSections

问题描述

我正在努力实现以下目标。我正在将一个 xml 字符串映射到一个 tableview 中。这部分工作正常，但是我也想在 tableview 中制作部分。我需要 LINENAME 作为 SectionName 并且 NODENAMES 应该作为行位于这些部分的下方。下面是它应该是什么样子的示例。

• 标题 (LINE1)

  • 单元格 (NODE1)
  • 单元格 (NODE2)

• 标题 (LINE2)

  • 单元（节点 1）

等等...

有人能给我一些关于如何实现这一目标的更多信息吗？

提前致谢。

var LineRows: [LineRow] = []

override func viewDidLoad() {
    super.viewDidLoad()

    let xmlString = """
    <?xml version="1.0" encoding="utf-8"?>
    <RESULT>
        <ROWSET>
            <ROW>
                <LINENAME>LINE1</LINENAME>
                <NODENAME>NODE1</NODENAME>
                <LINEID>1</LINEID>
            </ROW>
            <ROW>
                <LINENAME>LINE1</LINENAME>
                <NODENAME>NODE2</NODENAME>
                <LINEID>1</LINEID>
            </ROW>
            <ROW>
                <LINENAME>LINE2</LINENAME>
                <NODENAME>NODE1</NODENAME>
                <LINEID>2</LINEID>
            </ROW>
        </ROWSET>
    </RESULT>
    """

    let data = Data(xmlString.utf8) // Data for deserialization (from XML to object)
    do {
        let xml = try XMLSerialization.xmlObject(with: data,options: [.default,.cdataAsstring])
        let food = XMLMapper<LineResult>().map(XMLObject: xml)

        print(food?.Linerowset?.Linerows?.first?.Linename ?? "nil")

        self.LineRows = food!.Linerowset?.Linerows ?? []
        self.tableView.reloadData()
        
       // debugPrint(LineRows)

    } catch {
        print(error)
    }

}

将 XML 字符串映射到对象数组

// MAP NODE DETAILS //


    class LineResult: XMLMappable {
        var nodeName: String!

        var error: String?
        var Linerowset: LineRowset?

        required init?(map: XMLMap) {}

        func mapping(map: XMLMap) {
            error <- map.attributes["error"]
            Linerowset <- map["ROWSET"]
        }
    }

    class LineRowset: XMLMappable {
        var nodeName: String!

        var Linerows: [LineRow]?

        required init?(map: XMLMap) {}

        func mapping(map: XMLMap) {
            Linerows <- map["ROW"]
        }
    }

    class LineRow: XMLMappable {
        var nodeName: String!

        var Linename: String?
        var Nodename: String?
        var LineLineID: String?

        required init?(map: XMLMap) {}

        func mapping(map: XMLMap) {
            Linename <- map["LINENAME"]
            Nodename <- map["NODENAME"]
            LineLineID <- map["LINEID"]

        }
    }

表视图：

override func tableView(_ tableView: UITableView,numberOfRowsInSection section: Int) -> Int {
        //return LineRows.count
        return LineRows.count
    }

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

        let Cell = tableView.dequeueReusableCell(withIdentifier: "Cell",for: indexPath)
        let person = LineRows[indexPath.row]

        Cell.textLabel?.text = person.Nodename

        return Cell

    }

    override func prepare(for segue: UIStoryboardSegue,sender: Any?) {
        guard
            let indexPath = tableView.indexPathForSelectedRow,let vc = segue.destination as? LineDetails
        else {
            return
        }

        let person = LineRows[indexPath.row]
        vc.lineID = person.LineLineID!
    }

debugprint(LineRows) 响应：

[ApiApp.LineController.LineRow,ApiApp.LineController.LineRow,ApiApp.LineController.LineRow]

dump(LineRows) 响应：

LINE1
▿ 3 elements
  ▿ ApiApp.LineController.LineRow #0
    ▿ nodeName: Optional("ROW")
      - some: "ROW"
    ▿ Linename: Optional("LINE1")
      - some: "LINE1"
    ▿ Nodename: Optional("NODE1")
      - some: "NODE1"
    ▿ LineLineID: Optional("1")
      - some: "1"
  ▿ ApiApp.LineController.LineRow #1
    ▿ nodeName: Optional("ROW")
      - some: "ROW"
    ▿ Linename: Optional("LINE1")
      - some: "LINE1"
    ▿ Nodename: Optional("NODE2")
      - some: "NODE2"
    ▿ LineLineID: Optional("1")
      - some: "1"
  ▿ ApiApp.LineController.LineRow #2
    ▿ nodeName: Optional("ROW")
      - some: "ROW"
    ▿ Linename: Optional("LINE2")
      - some: "LINE2"
    ▿ Nodename: Optional("NODE1")
      - some: "NODE1"
    ▿ LineLineID: Optional("2")
      - some: "2"

解决方法

我会制作一个更适合您的表格视图的 ViewModel。

struct LineSections {
    let lineId: String?
    let lineName: String?
    let nodes: [LineRow]
}

我猜你在某处有 var LineRows: [LineRows] = [] 作为你的 ViewController 的一个属性。我会用 var lineSections: [LineSections] = [] 更改它。

那么，

self.LineRows = food!.Linerowset?.Linerows ?? []

let rows = food?.Linerowset?.Linerows ?? []
self.lineSections = Dictionary(grouping: rows,by: { $0.lineId }).values.compactMap { LineSections(lineId: $0.first?.lineId,lineName: $0.first?.lineName,nodes: $0) }.sorted(by: { $0.lineId ?? "" < $1.lineId ?? "" }

在你的表格视图中填充：

override func tableView(_ tableView: UITableView,numberOfRowsInSection section: Int) -> Int {
    return lineSections[section].node.count
}

override func numberOfSections(in tableView: UITableView) -> Int {
    return lineSections.count
}

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

    let cell = tableView.dequeueReusableCell(withIdentifier: "Cell",for: indexPath)
    let person = lineSections[indexPath.section].node[indexPath.row]
    cell.textLabel?.text = person.Nodename
    return cell
}

不相关：以小写开头命名您的变量：let Cell => let cell 等