iOS 15中的ubieview单元格的高度约束的奇怪行为15

Question

升级iOS 15后，我以前的代码开始工作很奇怪。

我有带有嵌入式视图的单元格的Uitable视图。当它在ViewDidload Cell的高度约束中加载时，我在情节板中设置的高度限制会变得活跃，并且单元格变得接近。点击单元格使高度约束变得不活跃并打开单元格。 foldView的高度约束

，但在iOS 15中，加载时始终打开。即使高度约束是活跃的。

在这里，我的代码使其打开或关闭：

var expanded: Bool = false {
        didSet {
            let duration = CATransaction.animationDuration()
            UIView.animate(withDuration: duration) {
                self.arrow.transform = self.expanded ? CGAffineTransform(rotationAngle: .pi / 2) :  .identity
               
                self.height.priority = .defaultHigh
                self.height.isActive = !self.expanded
                self.foldView.alpha = self.expanded ? 1 : 0
                self.container.layoutIfNeeded()
            }
            
        }
    }

这就是我添加嵌入式视图的方式：

func addEmbeddedView(_ view: UIView) {
        self.foldView.subviews.forEach { $0.removeFromSuperview() }
        self.foldView.addSubview(view)
        view.translatesAutoresizingMaskIntoConstraints = false
        let constraints = [
            view.leadingAnchor.constraint(equalTo: self.foldView.leadingAnchor),
            view.trailingAnchor.constraint(equalTo: self.foldView.trailingAnchor),
            view.topAnchor.constraint(equalTo: self.foldView.topAnchor),
            view.bottomAnchor.constraint(equalTo: self.foldView.bottomAnchor, constant: -9)
        ]
        constraints[3].priority = .defaultHigh
        NSLayoutConstraint.activate(constraints)
    }

但是！如果我从预期的所有作品中点击所有单元

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        guard let cell = tableView.cellForRow(at: indexPath) as? TableViewCell else { return }
        tableView.beginUpdates()
        cell.expanded.toggle()
        tableView.fixCellBounds()
        tableView.endUpdates()
    }

，并且在iOS 15中也打开和关闭单元格。

有什么建议是什么？ 正如我在iOS 15中的假设，自动层上的一些变化可能会影响我的代码。

在这里我的完整自定义单元类别：

import UIKit

class CustomTableViewCell: UITableViewCell {

    @IBOutlet weak var headerLabel: UILabel!
    @IBOutlet weak var descriptionLabel: UILabel!
    @IBOutlet weak var arrowImage: UIImageView!
    @IBOutlet weak var container: UIView!
    @IBOutlet weak var foldView: UIView!
    @IBOutlet weak var arrow: UIImageView!

    let layer1 = CALayer(), layer2 = CALayer(), layer3 = CALayer()

    var expanded: Bool = false {
        didSet {
            let duration = CATransaction.animationDuration()
            UIView.animate(withDuration: duration) {
                self.arrow.transform = self.expanded ? CGAffineTransform(rotationAngle: .pi / 2) :  .identity
               
                self.height.priority = .defaultHigh
                self.height.isActive = !self.expanded
         
                self.foldView.alpha = self.expanded ? 1 : 0
                self.container.layoutIfNeeded()
               
            }
            
        }
    }


    @IBOutlet weak var height: NSLayoutConstraint!
    override func awakeFromNib() {
        super.awakeFromNib()
        self.expanded = false
        
        
        container.layer.cornerRadius = 8
        container.layer.cornerCurve = .continuous
        container.backgroundColor = Colors_8_5.offWhite.color
        self.contentView.backgroundColor = .clear

        self.container.clipsToBounds = true
        self.contentView.clipsToBounds = false
        self.clipsToBounds = false
        self.selectionStyle = .none
        self.backgroundColor = .clear

        [layer1, layer2, layer3].forEach {
            $0.masksToBounds = false
            $0.backgroundColor = UIColor.clear.cgColor
            self.contentView.layer.insertSublayer($0, at: 0)
        }

        
    }

    func configure(with model: CustomCellModel) {
        self.headerLabel.attributedText = model.header
        self.descriptionLabel.attributedText = model.text
        self.descriptionLabel.isHidden = model.text == nil
    }

    override func setSelected(_ selected: Bool, animated: Bool) {
    }

    func addEmbeddedView(_ view: UIView) {
        self.foldView.subviews.forEach { $0.removeFromSuperview() }
        self.foldView.addSubview(view)
        view.translatesAutoresizingMaskIntoConstraints = false
        let constraints = [
            view.leadingAnchor.constraint(equalTo: self.foldView.leadingAnchor),
            view.trailingAnchor.constraint(equalTo: self.foldView.trailingAnchor),
            view.topAnchor.constraint(equalTo: self.foldView.topAnchor),
            view.bottomAnchor.constraint(equalTo: self.foldView.bottomAnchor, constant: -9)
        ]
        constraints[3].priority = .defaultHigh
        NSLayoutConstraint.activate(constraints)
    }

    override func layoutSubviews() {
        super.layoutSubviews()
        [layer1, layer2, layer3].forEach {
            $0.frame = container.frame
        }

        layer1.CustomapplySketchShadow(color: .black, alpha: 0.04, x: 0, y: 4, blur: 8, spread: 0)
        layer2.CustomapplySketchShadow(color: .black, alpha: 0.04, x: 0, y: 16, blur: 24, spread: 0)
        layer3.CustomapplySketchShadow(color: .black, alpha: 0.04, x: 0, y: 24, blur: 32, spread: 0)

    }

}


extension CALayer {
    func CustomapplySketchShadow(
        color: UIColor = .black,
        alpha: Float = 0.2,
        x: CGFloat = 0,
        y: CGFloat = 2,
        blur: CGFloat = 4,
        spread: CGFloat = 0)
    {
        shadowColor = color.cgColor
        shadowOpacity = alpha
        shadowOffset = CGSize(width: x, height: y)
        shadowRadius = blur / 2
        if spread == 0 {
            shadowPath = UIBezierPath(rect: self.bounds).cgPath
        } else {
            let dx = -spread
            let rect = bounds.insetBy(dx: dx, dy: dx)
            shadowPath = UIBezierPath(rect: rect).cgPath
        }
    }
}