如何将不同的数据从表视图传递到另一个视图控制器

Posted 2023-03-11

【中文标题】如何将不同的数据从表视图传递到另一个视图控制器

【英文标题】：How to pass the different data from table view to another view controller

【发布时间】：2020-05-16 14:47:48

【问题描述】：

我想将数据从表视图控制器传递到集合视图。我想做如果我选择品牌A，它会显示A品牌，如果我选择品牌B，它会显示品牌B

目前，我已经为 Brand 2 设置了数组：“Acme De La Vie”，但它什么也没显示。谁能帮我？？谢谢

这是我的代码：

ViewController 中的代码：

类：

 import UIKit
    class streetwearbrand
        var brandkeyword : String?
        var brandname : [String]?



    init(brandkeyword: String, brandname:[String]) 
        self.brandkeyword = brandkeyword
        self.brandname = brandname
    


class ViewController: UIViewController 

    @IBOutlet weak var SignUpButton: UIButton!
    @IBOutlet weak var LoginButton: UIButton!
    @IBOutlet weak var tableView: UITableView!
    @IBOutlet weak var searchBar: UISearchBar!


var Streetwearbrand = [streetwearbrand]()

    var searchBrand = [String]()

    var searching = false

    override func viewDidLoad() 
        super.viewDidLoad()

        Streetwearbrand.append(streetwearbrand.init(brandkeyword: "A", brandname:["A Cold Wall", "Acme De La Vie", "Adidas", "Anti Social Social Club"]))

        Streetwearbrand.append(streetwearbrand.init(brandkeyword: "B", brandname:["Balenciaga", "Bape"]))

        Streetwearbrand.append(streetwearbrand.init(brandkeyword: "C", brandname:["CDG Play", "Champion"]))

        Streetwearbrand.append(streetwearbrand.init(brandkeyword: "E", brandname:["Essential"]))

        Streetwearbrand.append(streetwearbrand.init(brandkeyword: "F", brandname:["Fila"]))

        Streetwearbrand.append(streetwearbrand.init(brandkeyword: "K", brandname:["Kenzo", "Kith"]))

        Streetwearbrand.append(streetwearbrand.init(brandkeyword: "M", brandname:["Marcello Burlon", "Moschino"]))

        Streetwearbrand.append(streetwearbrand.init(brandkeyword: "N", brandname:["Nike"]))

        Streetwearbrand.append(streetwearbrand.init(brandkeyword: "O", brandname:["Obey", "Off White"]))
    


extension ViewController: UITableViewDataSource, UITableViewDelegate, UISearchBarDelegate


    func numberOfSections(in tableView: UITableView) -> Int 

        return Streetwearbrand.count


    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int 
        if searching 
          return searchBrand.count
         else 
        return Streetwearbrand[section].brandname?.count ?? 0
    



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

    let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
        if searching
            cell.textLabel?.text = searchBrand[indexPath.row]
         else cell.textLabel?.text = Streetwearbrand[indexPath.section].brandname?[indexPath.row]
    

    return cell


    //for title

    func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? 
        return Streetwearbrand[section].brandkeyword
    

    func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? 
        let view = UIView(frame: CGRect(x: 0, y: 0, width: tableView.frame.width, height: 40))
        view.backgroundColor = .lightGray
        let label = UILabel(frame: CGRect(x: 15, y: 0, width: view.frame.width - 15, height: 40))
        label.text = Streetwearbrand[section].brandkeyword
        view.addSubview(label)
        return view
    

    //to generate the height of the keyword label

    func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat 
    return 40
    

To pass data from table view : 

    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) 
        let vc = storyboard?.instantiateViewController(withIdentifier: "SearchViewController") as? SearchViewController
        if Streetwearbrand[indexPath.item].brandname?[0] == "A Cold Wall"
        
            vc?.items.append(item(name: "Long Sleeve Abstract", price: "RM 1021", image: "longsleeve"))
            vc?.items.append(item(name: "Logo Graphic Print Top", price: "RM 860", image: "abstractprint"))
            vc?.items.append(item(name: "Material Study T-Shirt", price: "RM 750", image: "studymaterial"))
            vc?.items.append(item(name: "Mission Statement Print T-Shirt", price: "RM 750", image: "mission"))
            vc?.items.append(item(name: "Printed Logo T-Shirt", price: "RM 670", image: "white"))
            vc?.items.append(item(name: "Tie-Dye Print T-Shirt", price: "RM 760", image: "tiedye"))
         else if Streetwearbrand[indexPath.item].brandname?[1] == "Acme De La Vie"
        
            vc?.items.append(item(name: "ADLV Black Tee", price: "RM 250", image: "adlv2"))
            vc?.items.append(item(name: "ADLV X Sesame Street ", price: "RM 210", image: "adlv3"))
            vc?.items.append(item(name: "ADLV X Sesame Street", price: "RM 210", image: "adlv4"))
            vc?.items.append(item(name: "ADLV Black Hodie", price: "RM 300", image: "adlv5"))
            vc?.items.append(item(name: "ADLV X Sesame Street White", price: "RM 210", image: "adlv6"))
            vc?.items.append(item(name: "ADLV Black Tee", price: "RM 250", image: "adlv1"))
        

 self.navigationController?.pushViewController(vc!, animated: true)

    

Here my code at SearchViewController: 

import UIKit

here the struct 

struct item 
    var name : String
    var price : String
    var image : String


class SearchViewController: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource 

var items = [item]()

    @IBOutlet weak var collectionView: UICollectionView!

    @IBOutlet weak var collectionviewflow: UICollectionViewFlowLayout!

    override func viewDidLoad() 
        super.viewDidLoad()

        collectionView.delegate = self
        collectionView.dataSource = self

    

    func numberOfSections(in collectionView: UICollectionView) -> Int 
        return 1
    

    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int 
        return items.count
    

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell 
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! CollectionViewCell
        let cellIndex = indexPath.item
        cell.imageView.image = UIImage(named: items[indexPath.item].image)
        cell.labelname.text = items[indexPath.item].name
        cell.labelprice.text = items[indexPath.item].price

        cell.contentView.layer.cornerRadius = 10
        cell.contentView.layer.borderWidth = 1.0
        cell.contentView.layer.borderColor = UIColor.gray.cgColor
        cell.backgroundColor = UIColor.white

        cell.layer.shadowColor = UIColor.gray.cgColor
        cell.layer.shadowOffset = CGSize(width: 0.0, height: 2.0)
        cell.layer.shadowRadius = 2.0
        cell.layer.shadowOpacity = 1.0
        cell.layer.masksToBounds = false
        cell.layer.shadowPath = UIBezierPath(roundedRect: cell.bounds, cornerRadius: cell.contentView.layer.cornerRadius).cgPath

        return cell
    

    override func viewWillDisappear(_ animated: Bool) 
        items.removeAll()
    



extension SearchViewController : UICollectionViewDelegateFlowLayout 

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets 
        return UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
    


    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat 
        return 0
    

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat 
        return 10
    

【问题讨论】：

视图 A 和 B 是否嵌入在导航控制器中？

有2个视图控制器：视图控制器和searchviewcontroller @MAT

【参考方案1】：

要从表视图传递数据更新此方法，请改用节：

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) 
        let vc = storyboard?.instantiateViewController(withIdentifier: "SearchViewController") as? SearchViewController
        if Streetwearbrand[indexPath.section].brandname?[indexPath.row] == "A Cold Wall"
        
            vc?.items.append(item(name: "Long Sleeve Abstract", price: "RM 1021", image: "longsleeve"))
            vc?.items.append(item(name: "Logo Graphic Print Top", price: "RM 860", image: "abstractprint"))
            vc?.items.append(item(name: "Material Study T-Shirt", price: "RM 750", image: "studymaterial"))
            vc?.items.append(item(name: "Mission Statement Print T-Shirt", price: "RM 750", image: "mission"))
            vc?.items.append(item(name: "Printed Logo T-Shirt", price: "RM 670", image: "white"))
            vc?.items.append(item(name: "Tie-Dye Print T-Shirt", price: "RM 760", image: "tiedye"))
         else if Streetwearbrand[indexPath.section].brandname?[indexpath.row] == "Acme De La Vie"
        
            vc?.items.append(item(name: "ADLV Black Tee", price: "RM 250", image: "adlv2"))
            vc?.items.append(item(name: "ADLV X Sesame Street ", price: "RM 210", image: "adlv3"))
            vc?.items.append(item(name: "ADLV X Sesame Street", price: "RM 210", image: "adlv4"))
            vc?.items.append(item(name: "ADLV Black Hodie", price: "RM 300", image: "adlv5"))
            vc?.items.append(item(name: "ADLV X Sesame Street White", price: "RM 210", image: "adlv6"))
            vc?.items.append(item(name: "ADLV Black Tee", price: "RM 250", image: "adlv1"))
        

 self.navigationController?.pushViewController(vc!, animated: true)

    

【讨论】：

我尝试使用该代码，但它不起作用，当我运行它时，当我按下“Acme De La Vie”时，它显示“A Cold Wall”产品。如果我按下“Acme De La Vie”，我想制作它，它会显示“Acme De la Vie”产品。你能再帮帮我吗？ @jawadAli

它肯定会解决你的问题......以前......你的第一次检查总是正确的......这就是为什么你总是看到“冷墙”