问题描述
tableview单元格内的collectionview不能适应动态高度，就像我希望tableview单元格应采用collectionview单元格内标签的大小一样（标签的约束是前导，试用，顶部，底部是5倍于collectionview单元格的contentView）
class myRewardsViewController: UIViewController,UITableViewDataSource,UITableViewDelegate {
@IBOutlet weak var rewardsTableView: UITableView!
func tableView(_ tableView: UITableView,numberOfRowsInSection section: Int) -> Int {
return 1
}
func tableView(_ tableView: UITableView,cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "rewardsTV_cell",for: indexPath) as! rewardsCarouselTableViewCell
cell.layoutIfNeeded()
cell.carouselRewardsCV.reloadData()
cell.rewardCarouselHeight.constant = cell.carouselRewardsCV.collectionViewLayout.collectionViewContentSize.height
return cell
}
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
rewardsTableView.reloadData()
}
override func viewDidLoad() {
super.viewDidLoad()
rewardsTableView.estimatedRowHeight = 300
rewardsTableView.rowHeight = UITableView.automaticDimension
// Do any additional setup after loading the view.
}
func tableView(_ tableView: UITableView,heightForRowAt indexPath: IndexPath) -> CGFloat {
return UITableView.automaticDimension
}
/*
// MARK: - Navigation
// In a storyboard-based application,you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue,sender: Any?) {
// Get the new view controller using segue.destination.
// Pass the selected object to the new view controller.
}
*/
}
class rewardsCarouselTableViewCell: UITableViewCell,UICollectionViewDelegate,UICollectionViewDataSource{
@IBOutlet weak var carouselRewardsCV: UICollectionView!
@IBOutlet weak var rewardCarouselHeight: NSLayoutConstraint!
func collectionView(_ collectionView: UICollectionView,numberOfItemsInSection section: Int) -> Int {
return 5
}
func collectionView(_ collectionView: UICollectionView,cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "rewardsCV_cell",for: indexPath) as! rewardscarouselCollectionViewCell
return cell
}
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
carouselRewardsCV.delegate = self
carouselRewardsCV.dataSource = self
//carouselRewardsCV.selfSi
}
override func layoutSubviews() {
super.layoutSubviews()
layoutIfNeeded()
}
override func setSelected(_ selected: Bool,animated: Bool) {
super.setSelected(selected,animated: animated)
// Configure the view for the selected state
}
}
extension rewardsCarouselTableViewCell:
UICollectionViewDelegateFlowLayout{
func collectionView(_ collectionView: UICollectionView,layout collectionViewLayout: UICollectionViewLayout,sizeforItemAt indexPath: IndexPath) -> CGSize {
return CGSize(width: collectionView.frame.width,height: collectionView.frame.height)
}
}
DynamicHeightRewardsCollectionView类：UICollectionView {
override func layoutSubviews() {
super.layoutSubviews()
if bounds.size != intrinsicContentSize {
self.invalidateIntrinsicContentSize()
}
}
override var intrinsicContentSize: CGSize {
return collectionViewLayout.collectionViewContentSize
}
}
解决方法
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