如何添加Func以更新集合视图单元格的所有标签文本？

如何解决如何添加Func以更新集合视图单元格的所有标签文本？

我正在使用收藏夹视图，一切都很好，我想在收藏夹视图之外的文本字段中添加功能，结束编辑所有要更改的标签文本。
这是我的代码

我尝试了newValue（）函数的变体，但是没有运气。

import UIKit

class ViewController: UIViewController,UICollectionViewDataSource,UICollectionViewDelegate,UIGestureRecognizerDelegate,UITextFieldDelegate {
   var lastSelectedIndexPath:IndexPath?
    
    @IBOutlet weak var txtx: UITextField!
    var text2 = ["new text","text2","text3"]
    

    override func viewDidLoad() {
        
        
            let toolBar = UIToolbar()
            toolBar.sizeToFit()
            let flexibleSpace = UIBarButtonItem(barButtonSystemItem: .flexibleSpace,target: nil,action: nil)
            let doneButton = UIBarButtonItem(barButtonSystemItem: .done,action: #selector(doneButtonClicked))
            toolBar.setItems([flexibleSpace,doneButton],animated: false)
            doneButton.style = .done
            doneButton.tintColor = UIColor.white // should be white
           
        
        super.viewDidLoad()
        ItemCollection.delegate = self
        ItemCollection.dataSource = self
        txtx.delegate = self
        txtx.inputAccessoryView  = toolBar
    }
    @objc func doneButtonClicked() {
        view.endEditing(true)
    }

    // Store the clicked item location
    private var section: Int = 0
    private var item0 = 0


    
    
    
    func newValue() {
        
        //new func here
   
    }
    
    
    
    
   

    @IBAction func save() {

    }

    @IBOutlet weak var textField: UITextField!
    @IBOutlet weak var ItemCollection: UICollectionView!

    func collectionView(_ collectionView: UICollectionView,numberOfItemsInSection section: Int) -> Int {
        return text2.count
    }

    func collectionView(_ collectionView: UICollectionView,cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
   
        
        let cell = ItemCollection.dequeueReusableCell(withReuseIdentifier: "check",for: indexPath) as? checkCollectionViewCell
           
            cell?.isSelected = (lastSelectedIndexPath == indexPath)
               
                
         
             cell?.layer.backgroundColor =  colorLiteral(red: 0.1068892553,green: 0.119746305,blue: 0.1270511448,alpha: 1)
            cell?.layer.cornerRadius = 10


             cell?.backgroundColor = UIColor(red: 0/256,green: 128/256,blue: 255/256,alpha: 0.66)
       
           cell?.az.text = text2[indexPath.row]
            cell?.chechButton.backgroundColor = .clear
      

        return cell!
       }
    
    
    func collectionView(_ collectionView: UICollectionView,didSelectItemAt indexPath: IndexPath) {
        
       // text2[indexPath.row] = "Selected"
       // self.ItemCollection.reloadItems(at: [indexPath])
        
     
           guard lastSelectedIndexPath != indexPath else{
                   return
               }
               if lastSelectedIndexPath != nil {
                   ItemCollection.deselectItem(at: lastSelectedIndexPath!,animated: false)
               }
  
        
               let selectedCell = collectionView.cellForItem(at: indexPath) as! checkCollectionViewCell
               selectedCell.isSelected = true
               lastSelectedIndexPath = indexPath
    }
  
    





}

我找到了很多答案，但是都没有解决我的问题（