我正在尝试使用根据单元格内容调整宽度的单元格创建 UICollectionView，使用 layout.estimatedItemSize = UICollectionViewFlowLayout.automaticSize 但它不会更新。波纹管是我试图实现的目标的两个图像，下一个是我已经实现的目标。
这就是我想要实现的目标。
这是我已经能够实现的
这是我的代码
import UIKit
struct Model {
let name: String
let color: String
}
class DisplayTagsView: UIView {
// Collection View
var projectTagsCollectionView: UICollectionView!
var projectTagsCollectionViewHeightConstraint: NSLayoutConstraint!
private var tagsObjects = [Any]() // Object to allow add button
private var tags: [Model] = [] // Tags
// MARK: - Init
init() {
super.init(frame: .zero)
initViews()
initTags()
}
required init?(coder: NSCoder) {
super.init(coder: coder)
}
func initTags() {
self.tags.append(Model(name: "Some tag", color: "color"))
self.tags.append(Model(name: "Twotwo", color: "color"))
self.tags.append(Model(name: "Smartparking", color: "color"))
self.tags.append(Model(name: "Development", color: "color"))
self.tagsObjects = self.tags
self.tagsObjects.append(AddButtonCollectionViewCell.self)
}
// MARK: - Private
private func initViews() {
initTagCollectionView()
}
private func initTagCollectionView() {
let layout = UICollectionViewFlowLayout()
layout.estimatedItemSize = UICollectionViewFlowLayout.automaticSize
layout.minimumLineSpacing = 5
layout.minimumInteritemSpacing = 5
layout.scrollDirection = .vertical
projectTagsCollectionView = UICollectionView(frame: self.frame, collectionViewLayout: layout)
projectTagsCollectionView.delegate = self
projectTagsCollectionView.dataSource = self
projectTagsCollectionView.register(cell: ProjectCollectionViewCell.self)
projectTagsCollectionView.register(cell: AddButtonCollectionViewCell.self)
projectTagsCollectionView.isScrollEnabled = false
projectTagsCollectionView.backgroundColor = .clear
}
// set up views
func setupView() {
addSubview(projectTagsCollectionView)
setCollectionHeight()
}
// update height
func setCollectionHeight() {
projectTagsCollectionViewHeightConstraint = projectTagsCollectionView.heightAnchor.constraint(equalToConstant: 200)
projectTagsCollectionViewHeightConstraint.isActive = true
}
// Button button
func addButton() -> UIButton {
let addButton = UIButton()
addButton.setImage(#imageLiteral(resourceName: "settings"), for: .normal)
return addButton
}
}
// MARK: - UICollectionViewDelegateFlowLayout
extension DisplayTagsView : UICollectionViewDelegateFlowLayout {
// Auto resizing of the cell tags
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets {
let flowLayout = collectionViewLayout as? UICollectionViewFlowLayout
var newEdgeInsets = UIEdgeInsets(top: flowLayout!.sectionInset.top, left: flowLayout!.sectionInset.left, bottom: flowLayout!.sectionInset.bottom, right: flowLayout!.sectionInset.right)
if collectionView.numberOfItems(inSection: section) == 1 {
let edgeInset = newEdgeInsets.right + (collectionView.frame.width - flowLayout!.itemSize.width)
newEdgeInsets.right = edgeInset
}
return newEdgeInsets
}
}
// MARK: - UICollectionViewDelegate
extension DisplayTagsView: UICollectionViewDelegate {
}
// MARK: - UICollectionViewDataSource
extension DisplayTagsView: UICollectionViewDataSource {
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return tagsObjects.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let tagObject = self.tagsObjects[indexPath.item]
if let tag = tagObject as? Model {
let cell: ProjectCollectionViewCell = projectTagsCollectionView.dequeueTypedCell(forIndexPath: indexPath)
cell.configureCell(tagName: tag.name, tagBackground: tag.color)
return cell
} else {
// Adding button to the UICollection
let cell: AddButtonCollectionViewCell = membersCollectionView.dequeueTypedCell(forIndexPath: indexPath)
let addButto = addButton()
cell.contentView.subviews.forEach({$0.removeFromSuperview()})
cell.contentView.addSubview(addButton)
settingButton.snp.makeConstraints { make in
make.size.equalTo(cell.contentView)
}
return cell
}
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
print(indexPath)
}
}