Question

我正在尝试使用称为UICollectionViewCell的{{1}}来自定义material-components。但是，当我成功实现它时，这意味着当我单击每个单元格时我可以看到动画等。但是在实现该类MDCCardCollectionCell之后，当我单击每个MDCCardCollectionCell方法时，永远不会调用方法didSelect和每个单元格。

在它运行良好之前，我实施了MDCCardCollectionCell之后就出现了问题。如何解决这个特定问题？

这是我到目前为止所做的

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: cellId, for: indexPath) as! ExploreCellData

    cell.exploreData = exploreCategory?.data![indexPath.item]

    cell.layer.shouldRasterize = true
    cell.layer.rasterizationScale = UIScreen.main.scale
    cell.isSelectable = true
    cell.cornerRadius = 8
    cell.setShadowElevation(ShadowElevation(rawValue: 6), for: .selected)
    cell.setShadowColor(UIColor.black, for: .highlighted)
    return cell
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
    if let data = exploreCategory?.data![indexPath.item] {
        if let titleImage = data.imageName {
            print(titleImage)
            // This will push to another view controller after selected
            dashboardViewController?.showDetailEachItem(data: titleImage, imageContent: data.titleImage!, imageDesc: data.descImage!)
        }

    }

}

ExploreCellData是使用MDCCardCollectionCell

的自定义单元格

class ExploreCellData: MDCCardCollectionCell {

var exploreData: ExploreDataSection? {
    didSet{
        if let image = exploreData?.imageName {

            viewsProperty.exploreImageView.image = UIImage(named: image)
            viewsProperty.exploreNameLabel.text = exploreData?.titleImage
        }
    }
}

var viewsProperty = ExploreCategoryComponents()



let nameLabelView: UIView = {

    let view = UIView()
    view.translatesAutoresizingMaskIntoConstraints = false
    view.layer.cornerRadius = 5
    view.layer.masksToBounds = true
    view.backgroundColor = .white

    return view
}()



override init(frame: CGRect) {
    super.init(frame: frame)


    setupConstraint()
}

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



}
extension ExploreCellData {

func setupConstraint() {

    addSubview(viewsProperty.cardView)

    viewsProperty.cardView.frame = CGRect(x: 0, y: 0, width: frame.width, height: frame.height)

    viewsProperty.cardView.addSubview(viewsProperty.exploreImageView)
    viewsProperty.cardView.addSubview(nameLabelView)
    viewsProperty.cardView.addSubview(viewsProperty.exploreNameLabel)

    viewsProperty.exploreImageView.frame = CGRect(x: 5, y: 5, width: frame.width - 10, height: frame.height / 1.5)

    //        nameLabel.frame = CGRect(x: frame.width / 5, y: imageView.frame.maxY + 2, width: frame.width, height: frame.height / 4)

    viewsProperty.exploreNameLabel.topAnchor.constraint(equalTo: viewsProperty.exploreImageView.bottomAnchor).isActive = true
    viewsProperty.exploreNameLabel.widthAnchor.constraint(equalTo: self.widthAnchor).isActive = true
    viewsProperty.exploreNameLabel.bottomAnchor.constraint(equalTo: viewsProperty.cardView.bottomAnchor).isActive = true
    viewsProperty.exploreNameLabel.textAlignment = .center


//        viewsProperty.exploreNameLabel.centerYAnchor.constraint(equalTo: nameLabelView.centerYAnchor).isActive = true
//        viewsProperty.exploreNameLabel.centerXAnchor.constraint(equalTo: nameLabelView.centerXAnchor).isActive = true
  }

}

Answer 1

在集合视图中，didSelect尝试调用类类型

   let cell = collectionView.cell(indexPath.row) as? ExploreCellData
    if let data = cell.exploreCatagory.......

另外，尝试设置单元格isSelectable 这是一个网站，如果这些网站不起作用的话，会有所帮助：https://material.io/develop/ios/components/cards/api-docs/Classes/MDCCardCollectionCell.html#/c:objc(cs)MDCCardCollectionCell(py)selectable

MDCCardCollectionCell不调用didSelect方法-swift

1 个答案: