为啥要处理单击 TableView Swift IOS 值得单元格行之前单击的行？ [复制]

Posted 2023-02-27

【中文标题】为啥要处理单击 TableView Swift IOS 值得单元格行之前单击的行？ [复制]

【英文标题】：Why handle clicking on TableView Swift IOS worth cell rows are the previous rows clicked? [duplicate]为什么要处理单击 TableView Swift IOS 值得单元格行之前单击的行？ [复制]

【发布时间】：2019-05-30 04:20:58

【问题描述】：

我已经是用于显示来自 API 的 JSON 值的 TableView。但是点击的结果与现有的标题不匹配，但值得上一次点击的标题。看图更清楚

代码 InfoViewCell.swift 表格视图中的单元格代码

import UIKit

class InfoViewCell: UITableViewCell 
    @IBOutlet weak var imgInfo: UIImageView!
    @IBOutlet weak var lblInfo: UILabel!
    @IBOutlet weak var lblBerita: UILabel!


    override func awakeFromNib() 
        super.awakeFromNib()
        // Initialization code
    

    override func setSelected(_ selected: Bool, animated: Bool) 
        super.setSelected(selected, animated: animated)

        // Configure the view for the selected state
    

Code Info.swift 模型代码

class Info 

    var id_informasi: Int?
    var tgl_informasi: String?
    var judul: String?
    var berita: String?
    var foto: String?

    init(id_informasi:Int?,judul: String?,berita: String?,foto: String?) 
        self.id_informasi = id_informasi
        self.judul = judul
        self.berita = berita
        self.foto = foto
    

代码 InfoViewController.swift

import UIKit
import Alamofire
import AlamofireImage

class InformasiViewController: UIViewController, UITableViewDataSource, UITableViewDelegate 
    @IBOutlet weak var tableInfo: UITableView!
    var activityIndicator:UIActivityIndicatorView = UIActivityIndicatorView()


    var infoes = [Info]()

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int 
        return infoes.count
    

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

        //getting the hero for the specified position
        let inpo: Info
        inpo = infoes[indexPath.row]

        //displaying values
        cell.lblInfo.text = inpo.judul
        cell.lblBerita.text = inpo.berita

        //displaying image
        Alamofire.request(inpo.foto!).responseImage  response in
            debugPrint(response)

            if let image = response.result.value 
                cell.imgInfo.image = image
            
        

        return cell
    

    func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) 

        let info: Info
        info  = infoes[indexPath.row]

        //building an alert
        let alertController = UIAlertController(title: info.judul, message: "", preferredStyle: .alert)

        //the confirm action taking the inputs
        let confirmAction = UIAlertAction(title: "Enter", style: .default)  (_) in

        

        //the cancel action doing nothing
        let cancelAction = UIAlertAction(title: "Cancel", style: .cancel)  (_) in 

        //adding action
        alertController.addAction(confirmAction)
        alertController.addAction(cancelAction)

        //presenting dialog
        present(alertController, animated: true, completion: nil)
    



    override func viewDidLoad() 
        super.viewDidLoad()


        let defaultValues = UserDefaults.standard
        let token = defaultValues.string(forKey: "token")


        //the Web API URL
        let URL_GET_DATA = "https://api.landslidepad.com/api/admin_desa/informasi_penting?token=" + token!

        activityIndicator.center = self.view.center
        activityIndicator.hidesWhenStopped = true
        activityIndicator.style = UIActivityIndicatorView.Style.gray
        view.addSubview(activityIndicator)
        activityIndicator.startAnimating()
        //fetching data from web api
        Alamofire.request(URL_GET_DATA, method: .get).responseJSON
            

                response in
                //printing response
                print(response)

                self.activityIndicator.stopAnimating()
                //getting the json value from the server
                if let result = response.result.value 

                    let jsonData = result as! NSDictionary

                    //if there is no error
                    if((jsonData.value(forKey: "message") as! String == "Sukses!"))

                        //getting the user from response
                        let user = jsonData.value(forKey: "values") as! NSArray

                        for i in 0..<user.count

                            //adding hero values to the hero list
                            self.infoes.append(Info(
                                id_informasi: (user[i] as AnyObject).value(forKey: "id_informasi") as? Int,
                                judul: (user[i] as AnyObject).value(forKey: "judul") as? String,
                                berita: (user[i] as AnyObject).value(forKey: "berita") as? String,
                                foto: (user[i] as AnyObject).value(forKey: "foto") as? String
                            ))
                        
                        //displaying data in tableview
                        self.tableInfo.reloadData()

                    else
                        let alert = UIAlertController(title: "Ada yang salah?", message: "Silahkan Ulangi Kembali!.", preferredStyle: .alert)

                        alert.addAction(UIAlertAction(title: "Yes", style: .default, handler: nil))
                        alert.addAction(UIAlertAction(title: "No", style: .cancel, handler: nil))

                        self.present(alert, animated: true)
                    
                
        



        self.tableInfo.reloadData()
        // Do any additional setup after loading the view, typically from a nib.

        // Do any additional setup after loading the view.
    


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

我已经尝试创建 func tableview didDeselectRowAt indexPath， 但我想展示的价值不符合我的预期。我会将这个值传递给详细视图

谢谢

【问题讨论】：

选择其他单元格时调用didDeselectRowAt，只需将其替换为tableview的didSelect方法

哦，是的，现在开始工作了！谢谢

【参考方案1】：

当您单击一行时，该行被选中 - 而前一个选定的行被取消选中。好了，你已经实现了didDeselect，所以前面选中的行就显示出来了。相反，实现didSelect。

【参考方案2】：

而不是这个

func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) 

    let info: Info
    info  = infoes[indexPath.row]

    //building an alert
    let alertController = UIAlertController(title: info.judul, message: "", preferredStyle: .alert)

    //the confirm action taking the inputs
    let confirmAction = UIAlertAction(title: "Enter", style: .default)  (_) in

    

    //the cancel action doing nothing
    let cancelAction = UIAlertAction(title: "Cancel", style: .cancel)  (_) in 

    //adding action
    alertController.addAction(confirmAction)
    alertController.addAction(cancelAction)

    //presenting dialog
    present(alertController, animated: true, completion: nil)

请使用这个

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

    let info: Info
    info  = infoes[indexPath.row]

    //building an alert
    let alertController = UIAlertController(title: info.judul, message: "", preferredStyle: .alert)

    //the confirm action taking the inputs
    let confirmAction = UIAlertAction(title: "Enter", style: .default)  (_) in

    

    //the cancel action doing nothing
    let cancelAction = UIAlertAction(title: "Cancel", style: .cancel)  (_) in 

    //adding action
    alertController.addAction(confirmAction)
    alertController.addAction(cancelAction)

    //presenting dialog
    present(alertController, animated: true, completion: nil)