Ios CollectionView不响应触摸事件

我在

UIViewController

内部有一个

UICollectionView

声明如下：

class CollectionViewController : UIViewController, UICollectionViewDelegateFlowLayout, UICollectionViewDataSource, UICollectionViewDelegate {

    private var tables = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15]
    var collectionView : UICollectionView!


    override func viewDidLoad() {

        super.viewDidLoad()


        let layout = UICollectionViewFlowLayout()
        layout.scrollDirection = .vertical
        layout.minimumInteritemSpacing = 0
        layout.minimumLineSpacing = 0 

        collectionView = UICollectionView(frame: self.view.frame, collectionViewLayout: layout)
        collectionView.delegate = self
        collectionView.dataSource = self
        collectionView.showsVerticalScrollIndicator = false
        collectionView.backgroundColor = UIColor.clear
        collectionView.register(TableBookingCell.self, forCellWithReuseIdentifier: "TableBookingCell")

        collectionView.isUserInteractionEnabled = true
        self.view.isUserInteractionEnabled = true

        self.view.addSubview(collectionView)

        collectionView.snp.makeConstraints {
            make in

            make.edges.equalTo(view)
        }

    }




    //MARK: - CollectionViewDelegate

    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return tables.count
    }

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets {
        return UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
    }

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        return CGSize(width: self.view.frame.width, height: 80)
    }

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "TableBookingCell", for: indexPath) as! TableBookingCell

        cell.isUserInteractionEnabled = true

        return cell
    }

    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {

        if indexPath.row < self.tables.count {
            print("logging click")
        }
    }  
}

---

但是，

UICollectionView

没有响应任何

touchUpInside

事件

contentContainer似乎缺少高度约束。如果添加以下代码，您将明白我的意思

   contentContainer.clipsToBounds = true

在这种情况下，您根本看不到collectionView

添加高度约束并对齐contentContainer和CollectionViewController的底部可以使一切看起来都正常

    contentContainer.heightAnchor.constraint(equalToConstant: 3000).isActive = true


     collectionViewController.view.topAnchor.constraint(equalTo: contentContainer.topAnchor).isActive  = true

       collectionViewController.view.bottomAnchor.constraint(equalTo: contentContainer.bottomAnchor).isActive  = true

        collectionViewController.view.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive  = true

        collectionViewController.view.trailingAnchor.constraint(equalTo: view.trailingAnchor).isActive  = true

---

这并不是所有的故事，但明确回答了为什么collectionView不会响应触摸事件。希望您能找到。

当您设置

cell.isUserInteractionEnabled=true时，它不允许选择单元格。删除该行我添加了该行试图调试此问题-删除它不会修复任何问题您可以发布UI外观的屏幕截图吗？只添加此已修复的行-
collectionViewController.view.topAnchor.constraint（equalTo:dateAndPeopleContainer.bottomAnchor）.isActive=true
collectionViewController.view.bottomAnchor.constraint（equalTo:contentContainer.bottomAnchor）。isActive=true
collectionViewController.collectionView.isScrollEnabled=false
    contentContainer.heightAnchor.constraint(equalToConstant: 3000).isActive = true


     collectionViewController.view.topAnchor.constraint(equalTo: contentContainer.topAnchor).isActive  = true

       collectionViewController.view.bottomAnchor.constraint(equalTo: contentContainer.bottomAnchor).isActive  = true

        collectionViewController.view.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive  = true

        collectionViewController.view.trailingAnchor.constraint(equalTo: view.trailingAnchor).isActive  = true