需要使用CollectionView单元格将从UIImagePicker上载的图像显示到ImageView的帮助

import UIKit

let collectionView = UICollectionView(frame: CGRect(x: 0, y: 0, width: view.frame.width, height: view.frame.height), collectionViewLayout: UICollectionViewFlowLayout())

collectionView.dataSource = self
collectionView.delegate = self

extension YourViewController: UICollectionViewDataSource {
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        // 返回图像数量
    }
    
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "YourCellIdentifier", for: indexPath) as! YourCustomCell
        // 配置单元格显示的图像
        return cell
    }
}

extension YourViewController: UICollectionViewDelegate {
    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        // 处理选中某个图像的操作
    }
}

class YourCustomCell: UICollectionViewCell {
    let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: frame.width, height: frame.height))
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        addSubview(imageView)
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}