使用uicollection视图Swift更新单个视图

import UIKit

class ViewController: UIViewController, UICollectionViewDataSource {
    // 创建UICollectionView实例
    var collectionView: UICollectionView!
    // 数据源
    var data: [String] = ["Item 1", "Item 2", "Item 3"]
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 设置布局方式
        let layout = UICollectionViewFlowLayout()
        layout.itemSize = CGSize(width: 100, height: 100)
        
        // 初始化UICollectionView
        collectionView = UICollectionView(frame: view.bounds, collectionViewLayout: layout)
        collectionView.dataSource = self
        collectionView.register(UICollectionViewCell.self, forCellWithReuseIdentifier: "Cell")
        view.addSubview(collectionView)
    }
    
    // 实现UICollectionViewDataSource协议中的方法
    func numberOfSections(in collectionView: UICollectionView) -> Int {
        return 1
    }
    
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return data.count
    }
    
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Cell", for: indexPath)
        cell.backgroundColor = UIColor.blue
        cell.textLabel?.text = data[indexPath.item]
        return cell
    }
    
    // 更新单个视图
    func updateItem(at indexPath: IndexPath, with newData: String) {
        data[indexPath.item] = newData
        collectionView.reloadItems(at: [indexPath])
    }
}