Tableview 操作重置为原始值 swift MVVM

如何解决Tableview 操作重置为原始值 swift MVVM

我正在使用 Swift MVVM 编写一个非常简单的 tableview 应用程序。应用程序上有一个关注按钮，其文本会在点击时更改为取消关注。但问题是它的值在滚动后变回原始值。

下面是我的代码

型号

struct Person{
    var name: String
    var username : String
    var currentFollowing : Bool
    let image : UIImage?
 
}

主要ViewController

class ViewController: UIViewController,UITableViewDataSource,UITableViewDelegate,PersonFollowingTableViewCellDelegate {
    
    func PersonFollowingTableViewCell(_ cell: PersonFollowingTableViewCell,didTapWith array: Person) {
        return
    }
    
    var person = [Person]()
    let Vm = PersonFollowingTableViewviewmodel()
    override func viewDidLoad() {
        super.viewDidLoad()
        view.addSubview(tableView)
        tableView.dataSource = self
        tableView.frame = view.bounds
        self.tableView.reloadData()
        
        
    }
    
    
    
    // MARK: - Registering Tableview
    public let tableView  : UITableView = {
        let table = UITableView()
        table.register(FollowList_MVVM.PersonFollowingTableViewCell.self,forCellReuseIdentifier: FollowList_MVVM.PersonFollowingTableViewCell.identifier )
        return table
    }()
    
    
    // MARK: - Configuring the tableview
    
    func tableView(_ tableView: UITableView,numberOfRowsInSection section: Int) -> Int {
        return Vm.personFollowingTableViewviewmodel.count
        
    }
    var selectedindexArray:[Person] = []
    func tableView(_ tableView: UITableView,cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        
        guard let cell = tableView.dequeueReusableCell(withIdentifier: FollowList_MVVM.PersonFollowingTableViewCell.identifier,for: indexPath) as? PersonFollowingTableViewCell else{
            return UITableViewCell()
        }
     
            cell.configure(with: Vm.personFollowingTableViewviewmodel[indexPath.row])
            
            cell.delegate = self
            
 
        return cell
        
    }
    
    func tableView(_ tableView: UITableView,diddeselectRowAt indexPath: IndexPath) {
        selectedindexArray.append(Vm.personFollowingTableViewviewmodel[indexPath.row])
    }
   
    
}

视图模型

lass PersonFollowingTableViewviewmodel {

public var personFollowingTableViewviewmodel: [Person] =
    [
        Person(name: "Ben",username: "Ben \(Int.random(in: 111..<999) )",currentFollowing: false,image: UIImage(systemName: "person.fill")),Person(name: "Ann",username: "Ann\(Int.random(in: 111..<999) )",Person(name: "Tom",username: "Tom\(Int.random(in: 111..<999) )",Person(name: "Lee",username: "Lee\(Int.random(in: 111..<999) )",Person(name: "Craig",username: "Craig\(Int.random(in: 111..<999) )",image: UIImage(systemName: "person.fill"))
]
  

Tableview 单元格

protocol  PersonFollowingTableViewCellDelegate : AnyObject {
    
    func PersonFollowingTableViewCell( _ cell: PersonFollowingTableViewCell,didTapWith  : Person)
}

let Vm1 = PersonFollowingTableViewviewmodel()
class PersonFollowingTableViewCell: UITableViewCell {
    
    private var person : Person?
    static let identifier = "PersonFollowingTableViewCell"
    weak var delegate : PersonFollowingTableViewCellDelegate?
    
    // MARK: - Customise the button and Label Color
    
    public let userImageview: UIImageView = {
        let imageView = UIImageView()
        imageView.clipsToBounds = true
        imageView.contentMode  = .scaleAspectFit
        return imageView
    }()
    public let usernameLabel : UILabel = {
        let label = UILabel()
        label.textColor = .secondaryLabel
        return label
    }()
    public var nameLabel : UILabel = {
        let label = UILabel()
        label.textColor = .black
        return label
    }()
    public let button  : UIButton = {
        let button  = UIButton()
        return button
    }()
    
    // MARK: - Customise the button and Label Color
    
    override init(style : UITableViewCell.CellStyle,reuseIdentifier : String?){
        super.init(style: style,reuseIdentifier: reuseIdentifier)
        contentView.addSubview(usernameLabel)
        contentView.addSubview(nameLabel)
        contentView.addSubview(userImageview)
        contentView.addSubview(button)
        contentView.clipsToBounds = true
        button.addTarget(self,action: #selector(didTapButton),for: .touchUpInside)
        
    }
    //   MARK: - Configure cell from viewmodel
    required init?(coder: NSCoder) {
        fatalError()
    }
    let defaultPerson = Person(name: "default",username: "default",currentFollowing: true,image: nil)
    let Vc = ViewController()
    @objc private func didTapButton(){
        let currentFollowing = !(person?.currentFollowing ?? true)
        person?.currentFollowing = currentFollowing
        delegate?.PersonFollowingTableViewCell(self,didTapWith: person ?? defaultPerson)
        configure(with: person ?? defaultPerson)
      
    }

    func configure(with person1 : Person){
        self.person = person1
        nameLabel.text = person1.name
        usernameLabel.text = person1.username
        userImageview.image = person1.image
        if person1.currentFollowing{
            Unfollow
            
        
        }
        else{
            Follow
           
        }
    }
    
    
    
    // MARK: - Customise the TableView hight,width
    override func layoutSubviews() {
        super.layoutSubviews()
        let imageWidth = contentView.frame.size.height-10
        
        userImageview.frame = CGRect(x: 5,y: 5,width: imageWidth,height: imageWidth)
        
        nameLabel.frame = CGRect(
            x: imageWidth+10,y: 0,width: contentView.frame.size.width - imageWidth,height: contentView.frame.size.height/2)
        usernameLabel.frame = CGRect(
            x: imageWidth+10,y: contentView.frame.size.height/2,height: contentView.frame.size.height/2)
        
        button.frame = CGRect(
            x: contentView.frame.size.width-120,y: 10,width: 110,height: contentView.frame.size.height-20)
    }
    
    var Unfollow : Void  {
      
        button.setTitle("Unfollow",for: .normal)
        button.layer.borderWidth = 1
        button.layer.borderColor = UIColor.red.cgColor
        button.layer.backgroundColor = UIColor.blue.cgColor
        button.layer.cornerRadius = 8
    }
    var Follow : Void{
        button.setTitle("Follow",for: .normal)
        button.layer.borderWidth = 1
        button.layer.borderColor = UIColor.blue.cgColor
        button.layer.backgroundColor = UIColor.red.cgColor
        button.layer.cornerRadius = 8
        button.layer.borderColor = UIColor.blue.cgColor
        
    }
    
    override func prepareForReuse() {
        super.prepareForReuse()
        
        nameLabel.text = person?.name
        usernameLabel.text = person?.username
        userImageview.image = person?.image
        button.setTitle("Unfollow",for: .normal)
        button.layer.borderWidth = 1
        button.layer.borderColor = UIColor.red.cgColor
        button.layer.backgroundColor = UIColor.blue.cgColor
        button.layer.cornerRadius = 8
        
    }
}