将特定单元格放在 tableView 的顶部

Question

如何将特定单元格显示在 tableView 顶部？ , 例如我有 10 个单元格，其中 5 个为红色，另外 5 个为绿色，我想显示前 5 个单元格，顶部为绿色，另外 5 个单元格下方为红色？

我没有找到任何资源，所以我决定向亲爱的 SO 社区寻求建议。

代码：

extension MonitorimiViewController: UITableViewDelegate, UITableViewDataSource{

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


func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    guard let cell = tableView.dequeueReusableCell(withIdentifier: "monitorimiCell", for: indexPath) as? MyCustomCell1 else {return UITableViewCell()}
    let currentVechicle = listOfVechicle[indexPath.row]

    cell.veturaOutlet.text = currentVechicle.Plate
    cell.shpejtsiaAktualeOutlet.text = currentVechicle.Speed!
    cell.perditsuarOutlet.text = "\(currentVechicle.LastCommunicationDate!.convertToDisplayForm())"
    cell.pasagjereOutlet.text = "\(currentVechicle.Passengers!) Person/a"
    cell.vozitesiOutlet.text = "\(currentVechicle.Driver!)"

    switch currentVechicle.Status {
    case 1:
        cell.colorsImageView.backgroundColor = .green
    case 2:
        cell.colorsImageView.backgroundColor = .red
    case 3:
        cell.colorsImageView.backgroundColor = .black
    case 4:
        cell.colorsImageView.backgroundColor = .orange
    default: break
    }

    return cell

所以从currentVechicle.Status 开始，我需要先显示案例 1，然后再显示其余部分。

我的数据结构来自 API：

struct Vehicles: Codable {

var  IDVehicle: Int?
var  Title: String?
var  RegistrationDate: String?
var  ExpireDate: String?
var  Department: String?
var  Identification: String?
var  Speed: String?
var  Latitude: Double?
var  Longitude: Double?
var  Angle: Int?
var  Status: Int?
var  InputValue: Int?
var  Plate: String?
var  LastCommunicationDate: String?
var  Passengers: Int?
var  Driver: String?

}

来自api的json形式的数据：

{
 "IDVehicle": 0,
 "Title": "Truck",
 "RegistrationDate": "2017-10-26T17:23:20.677",
 "ExpireDate": "2022-10-28T00:00:00",
 "Department": "Transport",
 "Identification": "863286023094252",
 "Speed": "0",
 "Latitude": 80.8769778,
 "Longitude": 70.9877813,
 "Angle": 265,
 "Status": 1,          // I want the cells sorted based on the Status, If status 1 show cells with 1 on top etc.
 "InputValue": 0,
 "Plate": "09 09 KO",
 "LastCommunicationDate": "2021-10-28T13:53:23",
 "Passengers": 0,
 "Driver": "Empty"
}

Answer 1

struct Vehicles: Codable {
    var Title: String
    var Status: Int // I'm assuming this will never be null in your JSON. Remove all your question marks except for keys that might not have values.
}

var data = [Vehicles(Title: "Honda", Status: 2), Vehicles(Title: "Mazda", Status: 1), Vehicles(Title: "Subaru", Status: 1)]
// You surely keep your data in an Array like this, right? You will need it formatted like this to be able to index it using `IndexPath.row`

data.sort{$0.Status < $1.Status}
// Call this when you're done populating your data.

这里的关键在于 .map {} 部分。 $0 表示列表中的 THIS 元素，就像 name 中的 for name in names {} 表示列表中的当前名称一样。 $1 表示列表中的下一个元素。使用.sort() 时，您将一个值与下一个值重复进行比较。在这种情况下，我们使用 < 符号，因为我们希望较高的值位于列表的更下方。