Question

我第一次尝试构建一个分组而不是普通的tableView，但是当单元格被错误显示时显示的信息有问题。

首先我创建了一个数组，这个数组用于为我的组提供标题。接下来我有一个数组，其中包含4个数组，每个数组除了最后一个只剩下8个对象，只有1个，这4个数组是我的组。

当应用程序运行时，组表显示完全正确，但是当您单击特定行时，它可能会显示应该针对不同行的信息。我正在从数组中删除一些对象，只是为了让你看到更短的代码。

符文：

import UIKit

struct Rune {
    var runeName: String
    var runeImage: UIImage
    var runeDescription: String

}

的ViewController：

import UIKit

class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {

    @IBOutlet weak var tableView: UITableView!

    var runeTitle = [["Freyr/Freya's Aett"], ["Heimdall's Aett"], ["Tyr's Aett"], ["Additional Runes"]]

    let runes = [[Rune(runeName: "Fehu", runeImage: UIImage(named: ("Fehu.png"))!, runeDescription: "(F: Domestic cattle, wealth.) Possessions won or earned, earned income, luck. Abundance, financial strength in the present or near future. Sign of hope and plenty, success and happiness. Social success. Energy, foresight, fertility, creation/destruction (becoming).\n\n Fehu Reversed or Merkstave: Loss of personal property, esteem, or something that you put in effort to keep. It indicates some sort of failure. Greed, burnout, atrophy, discord. Cowardice, stupidity, dullness, poverty, slavery, bondage."),
                  Rune(runeName: "Wunjo", runeImage: UIImage(named: ("Wunjo.png"))!, runeDescription: "(W or V: Joy.) Joy, comfort, pleasure. Fellowship, harmony, prosperity. Ecstasy, glory, spiritual reward, but also the possibility of going \"over the top\". If restrained, the meaning is general success and recognition of worth.\n\n Wunjo Reversed or Merkstave: Stultification, sorrow, strife, alienation. Delirium, intoxication, possession by higher forces, impractical enthusiasm. Raging frenzy, berzerker.")],

                 [Rune(runeName: "Hagalaz", runeImage: UIImage(named: ("Hagalaz.png"))!, runeDescription: "(H: Hail.) Wrath of nature, destructive, uncontrolled forces, especially the weather, or within the unconscious. Tempering, testing, trial. Controlled crisis, leading to completion, inner harmony. Hagalaz Merkstave (Hagalaz cannot be reversed, but may lie in opposition): Natural disaster, catastrophe. Stagnation, loss of power. Pain, loss, suffering, hardship, sickness, crisis."),
                  Rune(runeName: "Sowilo", runeImage: UIImage(named: ("Sowilo.png"))!, runeDescription: "(S: The sun.) Success, goals achieved, honor. The life-force, health. A time when power will be available to you for positive changes in your life, victory, health, and success. Contact between the higher self and the unconscious. Wholeness, power, elemental force, sword of flame, cleansing fire. Sowilo Merkstave (Sowilo cannot be reversed, but may lie in opposition): False goals, bad counsel, false success, gullibility, loss of goals. Destruction, retribution, justice, casting down of vanity. Wrath of god.")],

                 [Rune(runeName: "Tiwaz", runeImage: UIImage(named: ("Tiwaz.png"))!, runeDescription: "(T: Tyr, the sky god.) Honor, justice, leadership and authority. Analysis, rationality. Knowing where one's true strengths lie. Willingness to self-sacrifice. Victory and success in any competition or in legal matters.\n\n Tiwaz Reversed or Merkstave: One's energy and creative flow are blocked. Mental paralysis, over-analysis, over-sacrifice, injustice, imbalance. Strife, war, conflict, failure in competition. Dwindling passion, difficulties in communication, and possibly separation."),
                  Rune(runeName: "Othala", runeImage: UIImage(named: ("Othala.png"))!, runeDescription: "(O: Ancestral property.) Inherited property or possessions, a house, a home. What is truly important to one. Group order, group prosperity. Land of birth, spiritual heritage, experience and fundamental values. Aid in spiritual and physical journeys. Source of safety, increase and abundance.\n\n Othala Reversed or Merkstave: Lack of customary order, totalitarianism, slavery, poverty, homelessness. Bad karma, prejudice, clannishness, provincialism. What a man is bound to.")],

                  [Rune(runeName: "Blank Rune", runeImage: UIImage(named: ("Blank.png"))!, runeDescription: "There is no historical support for a \"Blank Rune\" in runic divination. It was invented in the 1980's. It should not be used in a rune casting. If you bought a rune set with a blank piece, save it in case you lose another rune piece, but don't use it in rune casting.")]]

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

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    // #warning Incomplete implementation, return the number of rows
    return runes[section].count
}


func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

    // Configure the cell...

    let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as UITableViewCell;

    let item = runes[indexPath.section][indexPath.row]
    cell.imageView?.image = item.runeImage
    cell.textLabel?.text = item.runeName
    cell.accessoryType = UITableViewCellAccessoryType.disclosureIndicator

    return cell
}

func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {

    return String(describing: runeTitle[section][0])
}

var clickedIndex = 0
var section = 0

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    self.clickedIndex = indexPath.row
    self.section =  indexPath.section

}

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if segue.identifier == "segue" {

        let runeArray = runes[section][clickedIndex]
        let destinationVC = segue.destination as! SecondViewController
        destinationVC.selectedRune = runeArray
    }
}

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.

    }

}

SecondViewController：

import UIKit

class SecondViewController: UIViewController {

    var selectedRune: Rune!

    @IBOutlet weak var runeNameLabel: UILabel!
    @IBOutlet weak var runeImage: UIImageView!
    @IBOutlet weak var runeDescriptionLabel: UILabel!

    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.

        runeNameLabel.text = selectedRune.runeName
        runeImage.image = selectedRune.runeImage
        runeDescriptionLabel.text = selectedRune.runeDescription
    }

}

Answer 1

你有这个

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

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        // #warning Incomplete implementation, return the number of rows
        return runes[section].count
    }

因此，您还需要获取当前选定的部分，而不是获取indexPath.row。如，

self.clickedIndex = indexPath.row 
self.section = indexPath.section

然后你选择的runArray将是

let runeArray = runes[section][clickedIndex]

<强>更新

您的问题是在调用prepare:forSegue之前调用tableview:didSelectRowAt。您应该使用它们中的任何一个而不是两个。以下代码段显示了如何使用navigationtroller.pushViewController导航到其他视图控制器。

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {

        section = indexPath.section
        clickedIndex = indexPath.row
        let runeArray = runes[section][clickedIndex]

        let storyboard = UIStoryboard(name: "Main", bundle: nil)
        guard let destinationVC = storyboard.instantiateViewController(withIdentifier: "SecondVC") as? SecondViewController else { return}
        destinationVC.selectedRune = runeArray
        navigationController?.pushViewController(destinationVC, animated: true)        
}

请务必将Storyboard ID设置为 SecondVC 或您想要的任何内容。

Answer 2

为indexpath.section创建一个变量在didSelectRow中初始化它

override func prepare(for segue: UIStoryboardSegue, sender: Any?)           {
        if segue.identifier == "segue" 
{

     let runeArray = runes[ 
let item = runes[indexPath.section][indexPath.row] ]// variable runeArray is the child array from runes
        let destinationVC = segue.destination as! SecondViewController
        destinationVC.selectedRune = runeArray[indexpath.section ]// Now choose an actual Rune object from the array by index.    
    }

Answer 3

最好的方法是： 1.在表视图单元格中创建项目对象（在YourtableViewCell.h和YourtableViewCell.m中）。 2.然后在单元格中指定该项目（在cellForRowAtIndex方法中） 3.然后在

didSelectRowAt

现在您可以通过所选单元格获取该项目。

单击表行时，SecondViewController上显示的信息错误

3 个答案: