tableView返回函数没有从API调用获取数据，而是将tableView设为空

Question

我用Json中的请求数据制作了API文件，还制作了一个不同的类型数据结构，但我在检索数据时遇到了问题，它显示的是空的tableView，而不是至少显示我制作的单元格。

这是tableView:的返回代码

extension MonitorimiViewController: UITableViewDelegate, UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return vehicles.count
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "monitorimiCell", for: indexPath) as! MyCustomCell1
cell.configure()
return cell   
}

这是包含必须填写在Cell标签中的数据的结构文件：

struct Vehicles: Codable {
var  Plate: String?
var  Speed: Int
var  LastCommunicationDate: Int
var  Passengers: Int
var  Driver: String
}

这是API请求文件：

class APICaller {
static let shared = APICaller()
private let baseURL = "http://000.000.000.000:3030/api/"
private init() {}
func getVehicles(for id: String, IMEI: Int, completed: @escaping (Result<[Vehicles],OnTraErrors>) -> Void ){
let endpoint = baseURL + "GetVehicle/?UserIdentificationValue=JJGI243GJI3G&IMEI=623624346236"

let headers = [
"content-type": "application/json",
"authorizetoken": "NjQzOPA2N0NDNDFAH4CNDk3R23F2FQUY0NjV3FFE=",
"cache-control": "no-cache",
]

guard let url = URL(string: endpoint) else {
completed(.failure(.invalidURL))
return
}

var request = URLRequest(url: url, cachePolicy: .useProtocolCachePolicy, timeoutInterval: 120)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers

let session = URLSession.shared
let task = session.dataTask(with: request) { data, response, error in

if let _ = error {
completed(.failure(.unableToComplete))
return
}
guard let response = response as? HTTPURLResponse, response.statusCode == 200 else {
completed(.failure(.invalidResponse))
return
}
guard let data = data else {
completed(.failure(.invalidData))
return
}
do {
let decoder = JSONDecoder()
decoder.keyDecodingStrategy = .convertFromSnakeCase
let vehicles = try decoder.decode([Vehicles].self, from: data)
completed(.success(vehicles))
} catch {
completed(.failure(.invalidData))
}
}
task.resume()
}

因此，当我将返回车辆更改为返回10时，它只显示我的单元格如下：[1]：https://i.stack.imgur.com/aVp5Z.png

但现在它向我展示了这一点，而不是填充这些标签[2]：https://i.stack.imgur.com/RG4bb.png

Answer 1

确保您正在重新加载UITableView，您只需观察dataSource变量

var vehicles: [Vehicles] = [] { // i suggest renaming Vehicles struct to vehicle
didSet {
tableView.reloadDate()
}
}