Question

有一个任务。每个单元格都包含一个按钮，通过单击您要删除的单元格。问题在于，各节用于按类别描绘整个列表。我从Realm DB获取的数据。由于名称是重复的，因此必须在两种情况下进行删除，因此您需要考虑标签中的名称和节的名称。我将非常感谢带有注释的示例代码。

import UIKit
import RealmSwift

class PurchesViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {

    @IBOutlet weak var purchesTableView: UITableView!
    let manage = ManagerData()

    override func viewDidLoad() {
        super.viewDidLoad()
        purchesTableView.delegate = self
        purchesTableView.dataSource = self
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        purchesTableView.reloadData()
    }

    func numberOfSections(in tableView: UITableView) -> Int {
        return manage.loadPurchases().0.count
    }

    func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
        return manage.loadPurchases().0[section]
    }

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return manage.loadPurchases().1[section].count
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "purchesCell", for: indexPath) as! CustomPurchesTableViewCell

        cell.productLabel.text = manage.loadPurchases().1[indexPath.section][indexPath.row]
        cell.weightProductLabel.text = manage.loadPurchases().2[indexPath.section][indexPath.row]
        cell.weightNameLabel.text = manage.loadPurchases().3[indexPath.section][indexPath.row]

//        cell.boughtButton.addTarget(self, action: #selector(removeProduct), for: .touchUpInside)

        return cell
    }
}

class CustomPurchesTableViewCell: UITableViewCell {
    @IBOutlet weak var boughtButton: UIButton!
    @IBOutlet weak var productLabel: UILabel!
    @IBOutlet weak var weightProductLabel: UILabel!
    @IBOutlet weak var weightNameLabel: UILabel!

    @IBAction func removePurches(_ sender: Any) {
        print("remove")
    }
}

获取数据的方法

func loadPurchases() -> ([String], Array<Array<String>>, Array<Array<String>>, Array<Array<String>>) {
        var sections: [String] = []
        var product = Array<Array<String>>()
        var weight = Array<Array<String>>()
        var nameWeight = Array<Array<String>>()

        let realm = try! Realm()
        let data = realm.objects(Purches.self)
        for item in data {
            if sections.contains(item.nameDish) == false {
                sections.append(item.nameDish)
            }
        }

        for a in sections {
            var productArr = Array<String>()
            var weightArr = Array<String>()
            var nameWeightArr = Array<String>()
            for prod in data {
                if a == prod.nameDish {
                    productArr.append(prod.product)
                    weightArr.append(prod.weight)
                    nameWeightArr.append(prod.nameWeigh)
                }
            }
            product.append(productArr)
            weight.append(weightArr)
            nameWeight.append(nameWeightArr)
        }
        return (sections, product, weight, nameWeight)
    }

Answer 1

您将在单元格类中获得的索引路径索引路径具有两个属性部分和用于表视图的行

现在您可以在Controller类中创建更多方法，并将其分配给每个单元格变量，或者可以使用表视图提供的editAction进行删除

Answer 2

为了获取数字部分和行，您需要在自定义单元格中创建IBOutlet，并在ViewController类上为按钮创建addTarget。底部的示例代码。

import UIKit
import RealmSwift

class PurchesViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {

@IBOutlet weak var purchesTableView: UITableView!
let manage = ManagerData()

          //... more code ...

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "purchesCell", for: indexPath) as! CustomPurchesTableViewCell

        cell.productLabel.text = manage.loadPurchases().1[indexPath.section][indexPath.row]
        cell.weightProductLabel.text = manage.loadPurchases().2[indexPath.section][indexPath.row]
        cell.weightNameLabel.text = manage.loadPurchases().3[indexPath.section][indexPath.row]

        cell.boughtButton.addTarget(self, action: #selector(removePurches(_:)), for: .touchUpInside)

        return cell

    }

    @objc func removePurches(_ sender: UIButton) {
        let position: CGPoint = sender.convert(CGPoint.zero, to: purchesTableView)
        let indexPath: IndexPath! = self.purchesTableView.indexPathForRow(at: position)
        print("indexPath.row is = \(indexPath.row) && indexPath.section is = \(indexPath.section)")
        purchesTableView.deleteRows(at: [indexPath], with: .fade)
    }
}

和单元格的自定义类CustomPurchesTableViewCell

class CustomPurchesTableViewCell: UITableViewCell {
    @IBOutlet weak var boughtButton: UIButton! // you button for press
    @IBOutlet weak var productLabel: UILabel!
    @IBOutlet weak var weightProductLabel: UILabel!
    @IBOutlet weak var weightNameLabel: UILabel!
}

删除特定部分中的UITableView单元格

2 个答案: