删除一项时使用用户默认值保存数组

如何解决删除一项时使用用户默认值保存数组

我希望我的快速代码使用用户默认值来保存数组arr。当用户单击表视图单元格上的删除按钮时，它将删除该单元格和标签。我还想在func handle寄存器中执行的操作是从数组arr中删除数字，因此，如果删除了显示单元格2的单元格，我希望从数组arr中删除2。当应用关闭时，它应仅保存未删除的号码。就像下面的图片代表之前和

import UIKit

class ViewController: UIViewController,UITableViewDelegate,UITableViewDataSource {

  var arr = [0,1,2,3,4]
    func tableView(_ tableView: UITableView,numberOfRowsInSection section: Int) -> Int {
        return arr.count
    }

    func tableView(_ tableView: UITableView,cellForRowAt indexPath: IndexPath) -> UITableViewCell {
       let cell = tableView.dequeueReusableCell(withIdentifier: "cell",for: indexPath) as! customtv
       cell.lbl.text = "\(arr[indexPath.row])"
       cell.deleteBTN.tag = indexPath.row
       cell.deleteBTN.addTarget(self,action:#selector(handleRegister(_:)),for: .touchUpInside)
       return cell
    }
    @objc func handleRegister(_ sender: UIButton){
         arr.remove(at:sender.tag)
         tableView.deleteRows(at:[IndexPath(row:sender.tag,section:0)],with:.none)
        
        let defaults = UserDefaults.standard
        defaults.set(arr,forKey: "arrNum")
    }

    func tableView(_ tableView: UITableView,heightForRowAt indexPath: IndexPath) -> CGFloat { 118 }

    var tableView = UITableView()
    var selectedIndexPath = IndexPath(row: 0,section: 0)

    override func viewDidLoad() {
        super.viewDidLoad()

        setTableVIew()
    }


    func setTableVIew(){
    
          
         
       
        
        let VCframe = view.frame
        let height = VCframe.height * 0.8
           
        let widthx = VCframe.width

   
             tableView.frame = CGRect(x: 10,y: 0,width: widthx - 20,height: height)
          
        tableView.delegate = self
        tableView.dataSource = self
        view.addSubview(tableView)
  
      
        tableView.register(customtv.self,forCellReuseIdentifier: "cell")
    }
 




    
}
class customtv: UITableViewCell {
    lazy var backView : UIView = {
      let view = UIView(frame: CGRect(x: 10,y: 6,width: self.frame.width,height: 110))
      view.backgroundColor = .green
      print(self.frame.width)
          return view
      }()
      

      
      override func layoutSubviews() {
         backView.clipsToBounds = true
         backView.frame =  CGRect(x: 0,width: bounds.maxX,height: 110)
   

      }
    lazy var lbl : UILabel = {
        let press = UILabel(frame: CGRect(x: 0,y: 3,width: 120,height: 50))
        press.backgroundColor = .yellow
        press.text = String("1")
            
        return press
    }()

   
 


 
    lazy var deleteBTN : UIButton = {
        let press = UIButton(frame: CGRect(x: 200,width: 65,height: 50))
        press.backgroundColor = .systemBlue
        press.setTitle("DELETE",for: .normal)

        return press
    }()

 
override func setSelected(_ selected: Bool,animated: Bool) {
    super.setSelected(animated,animated: true)
    addSubview(backView)
    backView.addSubview(deleteBTN)
    backView.addSubview(lbl)
}

}