在表中插入一行时，“试图将第0行插入第0部分，但更新后第0部分只有0行”

Question

I've been getting this error when I try to insert a row in my table. I've looked at the other answers for hours but either they are doing something different or it is written in Objective C. I'm very new to swift so I may be doing something obviously wrong that i just cant figure out.

Here is my code:

import UIKit
import Alamofire
import SwiftyJSON
import SwiftDate

class LaunchesViewController: UIViewController {

    @IBOutlet var launchesTable: UITableView!

    var launches : [Launch]!

    override func viewDidLoad() {

        super.viewDidLoad()

        // Do any additional setup after loading the view.

        loadLaunches()
    }

    func loadLaunches()
    {

        Alamofire.request("http://10.0.0.26:5000/V1/Launches/Test", method: .get).validate().responseJSON { response in

            let json = JSON(response.result.value!)

            let jsonArray = json.arrayValue

            self.launches = []

            for jsonObject in jsonArray {

                self.launches.append(Launch(launchDate:     jsonObject["LaunchDate"].string?.toDate(),  launchName: jsonObject["LaunchName"].string))
            }

            self.onLaunchesLoaded()
        }
    }

    func onLaunchesLoaded()
    {
        self.launchesTable.beginUpdates()
        self.launchesTable.insertRows(at: [IndexPath.init(row: 0, section: 0)], with: .none)
        self.launchesTable.endUpdates()
    }

}

Answer 1

You should configure your table view's data source properly. First, specify the number of sections via numberOfSectionsInTableView: and number of rows tableView:numberOfRowsInSection: based on the data that is returned by your network request. Also, because table view cells are reused the best way to populate the table view cells is through the table view data source tableView:cellForRowAtIndexPath: method instead of calling insertRows() method. This should be covered in the Basics of TableView Creation .