在具有动态大小的collectionViewCell中使用scrollView,可以通过以下步骤实现:
以下是一个示例代码,展示如何在具有动态大小的collectionViewCell中使用scrollView:
class CustomCollectionViewCell: UICollectionViewCell {
let scrollView = UIScrollView()
let contentView = UIView()
override init(frame: CGRect) {
super.init(frame: frame)
// 添加scrollView
contentView.translatesAutoresizingMaskIntoConstraints = false
scrollView.addSubview(contentView)
contentView.leadingAnchor.constraint(equalTo: scrollView.leadingAnchor).isActive = true
contentView.trailingAnchor.constraint(equalTo: scrollView.trailingAnchor).isActive = true
contentView.topAnchor.constraint(equalTo: scrollView.topAnchor).isActive = true
contentView.bottomAnchor.constraint(equalTo: scrollView.bottomAnchor).isActive = true
contentView.widthAnchor.constraint(equalTo: self.widthAnchor).isActive = true
// 添加需要展示的内容
let imageView = UIImageView(image: UIImage(named: "image"))
imageView.translatesAutoresizingMaskIntoConstraints = false
contentView.addSubview(imageView)
imageView.leadingAnchor.constraint(equalTo: contentView.leadingAnchor).isActive = true
imageView.trailingAnchor.constraint(equalTo: contentView.trailingAnchor).isActive = true
imageView.topAnchor.constraint(equalTo: contentView.topAnchor).isActive = true
imageView.heightAnchor.constraint(equalToConstant: 200).isActive = true
let label = UILabel()
label.text = "Some text"
label.translatesAutoresizingMaskIntoConstraints = false
contentView.addSubview(label)
label.leadingAnchor.constraint(equalTo: contentView.leadingAnchor).isActive = true
label.trailingAnchor.constraint(equalTo: contentView.trailingAnchor).isActive = true
label.topAnchor.constraint(equalTo: imageView.bottomAnchor, constant: 10).isActive = true
// 设置scrollView的属性
scrollView.translatesAutoresizingMaskIntoConstraints = false
scrollView.showsVerticalScrollIndicator = false
scrollView.showsHorizontalScrollIndicator = false
scrollView.contentSize = contentView.bounds.size
// 添加scrollView到collectionViewCell
contentView.addSubview(scrollView)
scrollView.leadingAnchor.constraint(equalTo: self.leadingAnchor).isActive = true
scrollView.trailingAnchor.constraint(equalTo: self.trailingAnchor).isActive = true
scrollView.topAnchor.constraint(equalTo: self.topAnchor).isActive = true
scrollView.bottomAnchor.constraint(equalTo: self.bottomAnchor).isActive = true
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
// 在collectionView的数据源方法中计算collectionViewCell的大小
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
// 根据内容的大小来确定collectionViewCell的高度
let cellWidth = collectionView.bounds.width
let cellHeight: CGFloat = 250 // 根据具体需求设置高度
return CGSize(width: cellWidth, height: cellHeight)
}
这样,就可以在具有动态大小的collectionViewCell中使用scrollView,并根据内容的大小来确定collectionViewCell的高度。
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