ios - 在收集单元格中添加背景 View

Question

我使用UITableViewCell.xib来定制单元格。我显示文本和图片，将View添加到单元格的背景中。只有7个单元格，在一个单元格中，我需要用另一个UIView.xib替换此背景。我试图实现这一点，但是它没有给我结果，所有单元格的背景都是相同的。
或者如何将Background View单元格的属性更改为View.xib

CollectionCell.swift

import UIKit

class CollectionViewCell: UICollectionViewCell {

    static var identifier: String = "CollectionViewCell"

    @IBOutlet weak var icon: UIImageView!
    @IBOutlet weak var titleLabel: UILabel!
    @IBOutlet weak var customBackgoundView: UIView!

    override func awakeFromNib() {
        super.awakeFromNib()
        // Initialization code

    }
}

CustomeView.swift

import UIKit

class CustomBackgroundView: UIView {

    @IBOutlet weak var contentView:UIView!


    //MARK: Override
    override init(frame: CGRect) {
        super.init(frame: frame)
        commonInit()
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        commonInit()
    }

    private func commonInit() {
        Bundle.main.loadNibNamed("CustomBackgroundView", owner: self, options: nil)
        addSubview(contentView)
        contentView.frame = self.bounds
    }
}

CollectionView.swift
让背景= CustomBackgroundView()

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: CollectionViewCell.identifier, for: indexPath) as? CollectionViewCell


            // here i'm doing something wrong because nothing changes
  if indexPath.row == 3 {
        cell?.customBackgoundView = background
        cell?.contentView.addSubview(background)
    }
        return cell ?? UICollectionViewCell()
    }

Answer 1

问题是，当您想在单元格上添加某些内容时，应该添加它的contentview。因此，尝试与contentView一起使用

  func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: CollectionViewCell.identifier, for: indexPath) as? CollectionViewCell
 if indexPath.row == 3 {
                 var backgroundView = Bundle.main.loadNibNamed("CustomBackgroundView", owner: self, options: nil)![0] as! UIView
             backgroundView.frame = cell.contentView.frame
            cell.contentView.addSubview(yourCustomView)
            cell.contentView.sendSubviewToBack(yourCustomView)
        return cell!
                } else {
                    return cell ?? UICollectionViewCell()
                }