Question

我一直这样：

由于未捕获的异常终止应用程序＆＃39; NSInternalInconsistencyException＆＃39;，原因：＆＃39;尝试将第0行插入第0部分，但更新后只有0部分＆＃39;

这是我的代码：

import UIKit

class UtilityBillTableViewController: UITableViewController {

    var bills = [UtilityBill]()

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

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    // MARK: - Table view data source

    override func numberOfSections(in tableView: UITableView) -> Int {
        // #warning Incomplete implementation, return the number of sections
        return 0
    }

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        // #warning Incomplete implementation, return the number of rows
        return 0
    }

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "reuseIdentifier", for: indexPath)

        // Configure the cell...

        return cell
    }

    // Override to support conditional editing of the table view.
    override func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
        // Return false if you do not want the specified item to be editable.
        return true
    }

    // Override to support editing the table view.
    override func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
        if editingStyle == .delete {
            // Delete the row from the data source
            tableView.deleteRows(at: [indexPath], with: .fade)
        } else if editingStyle == .insert {
            // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
        }    
    }

    // Override to support rearranging the table view.
    override func tableView(_ tableView: UITableView, moveRowAt fromIndexPath: IndexPath, to: IndexPath) {

    }

    // Override to support conditional rearranging of the table view.
    override func tableView(_ tableView: UITableView, canMoveRowAt indexPath: IndexPath) -> Bool {
        // Return false if you do not want the item to be re-orderable.
        return true
    }

    // MARK: - Navigation

    // In a storyboard-based application, you will often want to do a little preparation before navigation
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        // Get the new view controller using segue.destinationViewController.
        // Pass the selected object to the new view controller.
    }

    @IBAction func unwindToBillList(sender: UIStoryboardSegue){
        if let sourceViewController = sender.source as? UtilitiesViewController, let bill = sourceViewController.bill {
            // Add a new meal item.

            let newIndexPath = NSIndexPath(row: bills.count, section: 0)
            bills.append(bill)
            tableView.insertRows(at: [newIndexPath as IndexPath], with: .bottom)               
        }

    }
}

Answer 1

您需要使numberOfSections和numberOfRowsInSection返回反映与您的数据相对应的值的变量。在0对它们进行硬编码是没有意义的。错误表示您已将数据插入第一部分（第0部分），但您仍有0部分，这没有任何意义。当然你至少需要1个部分。

尝试以下实施：

override func numberOfSections(in tableView: UITableView) -> Int {
    return 1
}

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

尝试添加行时，应用程序会不断崩溃？

1 个答案: