如何实现动态CollectionView Cell Height (Size for item at)？

如何解决如何实现动态CollectionView Cell Height (Size for item at)？

我决定第一次开始一个没有故事板的项目，目前我正试图弄清楚如何在我的 CollectionViewController 中实现一个合适的动态单元格。在 Stackoverflow 中阅读这里的一些解决方案我明白了使用 layout.estimatedItemSize 的观点，但它以某种方式阻止了集合视图的弹跳效果，并且在我的第二个单元格中，水平滚动视图在此实现后将无法工作。>

这是我的代码（UICollectionViewController）：

class InfoEmpaVC: UICollectionViewController,UICollectionViewDelegateFlowLayout {
    
fileprivate let cell1 = "cell1"
fileprivate let cell2 = "cell2"

fileprivate let cellID = "cellID"
fileprivate let headerID = "headerID"
fileprivate let padding: CGFloat = 10

//


//
    
//GET THE DATA FROM:
var empanada: Empanadas!

struct Cells {
    static let empanadaStepsCell = "EmpanadaStepsCell"
}


override func viewDidLoad() {
    super.viewDidLoad()
    
    
    
    setupCollectionViewLayout()
    setupCollectionView()
    
    
}



//CHANGE COLOR OF STATUS BAR
override var preferredStatusBarStyle: UIStatusBarStyle {
    return .lightContent
}

fileprivate func setupCollectionView() {
    
    collectionView.backgroundColor = UIColor(named: "ColorBackground")
    collectionView.contentInsetAdjustmentBehavior = .never
    
    
    collectionView.delegate = self
    collectionView.dataSource = self
    
    collectionView.register(InfoHeaderVC.self,forSupplementaryViewOfKind: UICollectionView.elementKindSectionHeader,withReuseIdentifier: headerID)
    
    
    //FirstCELL
    collectionView.register(EmpaIngredientsListCell.self,forCellWithReuseIdentifier: cell1)
    //SecondCELL
    collectionView.register(EmpaStepsCell.self,forCellWithReuseIdentifier: cellID)
    

}

fileprivate func setupCollectionViewLayout() {
    if let layout = collectionViewLayout as? UICollectionViewFlowLayout {

        layout.sectionInset = .init(top: padding,left: padding,bottom: padding,right: padding)
        layout.estimatedItemSize = CGSize(width: view.frame.width,height: 50)
    }
}


var headerView: InfoHeaderVC!

//HEADER COLLECTION VIEW
override func collectionView(_ collectionView: UICollectionView,viewForSupplementaryElementOfKind kind: String,at indexPath: IndexPath) -> UICollectionReusableView {
    
    headerView = collectionView.dequeueReusableSupplementaryView(ofKind: kind,withReuseIdentifier: headerID,for: indexPath) as? InfoHeaderVC
    
    headerView.empaImageView.image = UIImage(named: empanada.image)
    headerView.empaTitleLabel.text = empanada.name
    headerView.empaDescriptionLabel.text = empanada.info
    headerView.buttonX.addTarget(self,action: #selector(dismissVC),for: .touchUpInside)
    headerView.buttonAddFavorite.addTarget(self,action: #selector(addButtonTapped),for: .touchUpInside)
    
    
    
    return headerView!
}
    

func collectionView(_ collectionView: UICollectionView,layout collectionViewLayout: UICollectionViewLayout,referenceSizeForHeaderInSection section: Int) -> CGSize {
    return .init(width: view.frame.width,height: 350)
    
}

override func collectionView(_ collectionView: UICollectionView,numberOfItemsInSection section: Int) -> Int {
    
   return 2
    
}


override func collectionView(_ collectionView: UICollectionView,cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    
    if indexPath.item == 0 {
        
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: cell1,for: indexPath)
        
        guard let cellOne = cell as? EmpaIngredientsListCell else {
            fatalError("Wrong cell type for section 0. Expected CellTypeOne")
        }
        
        //INGREDIENT LIST
        
        cellOne.empaIngredientList.ingredientList.append(contentsOf: empanada.ingredients)
        cellOne.empaIngredientList.configure()
        
        return cellOne
        
    } else {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: cellID,for: indexPath) as! EmpaStepsCell
        
        
        cell.pasos.append(contentsOf: empanada.pasos)
        cell.titleHeaderLabel.text = "Step by Step"
        cell.configure()
        
        print (cell.pasos.count)
        
        return cell
    }
}





func collectionView(_ collectionView: UICollectionView,sizeForItemAt indexPath: IndexPath) -> CGSize {

    if indexPath.item == 0 {


        return .init(width: view.frame.width - 2 * padding,height: 300)


    } else {
        return .init(width: view.frame.width - 2 * padding,height: 300)
    }


}



//OBJC FUNC
@objc func dismissVC() {
    dismiss(animated: true)
}

//SAVE DATA
@objc func addButtonTapped() {
    configureSaveToFavorites(empanada: empanada!)
    
}

}

单元格 1：

导入 UIKit 导入 SnapKit class EmpaIngredientsListCell: UICollectionViewCell {

let empaIngredientList = EmpaIngredientsContainerView()


override init(frame: CGRect) {
    super.init(frame: frame)
    
    setupUI()
    
    print(intrinsicContentSize)
}


required init?(coder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
}



override func preferredLayoutAttributesFitting(_ layoutAttributes: UICollectionViewLayoutAttributes) -> UICollectionViewLayoutAttributes {
    setNeedsLayout()
    layoutIfNeeded()
    let size = contentView.systemLayoutSizeFitting(layoutAttributes.size)

    var frame = layoutAttributes.frame
    frame.size.height = ceil(size.height)

    layoutAttributes.frame = frame



    return layoutAttributes
}


func setupUI() {
    
    //contentView.translatesAutoresizingMaskIntoConstraints = false
    contentView.addSubview(empaIngredientList)

    
    empaIngredientList.snp.makeConstraints { (make) in

        make.top.bottom.left.right.equalTo(self.contentView)
        make.edges.equalTo(self.safeAreaLayoutGuide)
      
    }
}

}