模型数组中的 UITableView 和单元格

Question

我遇到了一些我不太明白的事情，从一些测试来看，表格单元格的生成似乎是在页面加载和 Alamofire 请求之前发生但在之后却没有发生。

如果您在下面看到，我正试图在参考专业人士后将它送到我们博物馆的出境货物查看位置：

import Alamofire
import SwiftyJSON

class ShipmentProSearchResultsTableViewController: UITableViewController {

    var pronumber:String = ""
    var shipments = [Shipment]()
    typealias JSONStandard = [String: AnyObject]

    override func viewDidLoad() { 
        super.viewDidLoad()
        fetchShipments()

    }

    func fetchShipments() {
        let parameters: Parameters = ["pro_number": pronumber]
        let todoEndpoint: String = "OURHOST/shipments/api/details/pro"
        Alamofire.request(todoEndpoint, method: .get, parameters: parameters)
            .responseJSON { response in
            if response.result.isSuccess{
                let shipmentJSON : JSON = JSON(response.result.value!)
                for (index, subJson):(String, JSON) in shipmentJSON{
                    let proNumber = subJson["proNumber"].int
                    let consigneeName = subJson["consignee"]["name"].string
                    let shipment = Shipment(proNumber: proNumber!, consigneeName: consigneeName!)

                    self.shipments.append(shipment)
                }
                print(self.shipments)
            }else{
                print("Could not get results")
            }
        }
    }


    // MARK: - Table view data source

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


    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "ShipmentCell", for: indexPath)
        let shipment = shipments[indexPath.row]

        cell.textLabel?.text = "Hello"
        cell.detailTextLabel?.text = "\(shipment.proNumber)"

        return cell
    }
}

现在我打印self.shipments，得到以下结果：

[OakRidgeArchaeologicalRepositoryDispatcher.Shipment(proNumber: 471008276, consigneeName: "A1 CHICAGO INSTITUTE OF THE ARTS")]

所以我知道数据正在适当地传递给模型。我还会注意到情节提要中的表格视图单元格标识符正确设置为ShipmentCell。但是查询之后，我的表中什么也没有弹出。

我正在使用 Swift 4。

Answer 1

您应该在更新源字段后重新加载tableView。

func fetchShipments() {
        let parameters: Parameters = ["pro_number": pronumber]
        let todoEndpoint: String = "OURHOST/shipments/api/details/pro"
        Alamofire.request(todoEndpoint, method: .get, parameters: parameters)
            .responseJSON { response in
            if response.result.isSuccess{
                let shipmentJSON : JSON = JSON(response.result.value!)
                for (index, subJson):(String, JSON) in shipmentJSON{
                    let proNumber = subJson["proNumber"].int
                    let consigneeName = subJson["consignee"]["name"].string
                    let shipment = Shipment(proNumber: proNumber!, consigneeName: consigneeName!)

                    self.shipments.append(shipment)
                }
                tableView.reloadData() //<-------add this.
                print(self.shipments)
            }else{
                print("Could not get results")
            }
        }
    }