1
在Xcode 8.2.1和Swift 3中，我在UITableViewCell中有一個UICollectionView，但是我無法獲得正確的佈局。基本上我希望能夠看到所有的明星。我可以調整恆星的大小，但我想解決潛在的問題，擴大藍帶。UITableViewCell動態佈局中的Swift UICollectionView無法更改單元格高度
這是一個視圖的鏡頭紅色帶是contentView，藍色帶是collectionView。乍一看，它看起來像collectionView的高度是問題，但它實際上被其他東西隱藏。我無法找到或更改隱藏collectionView單元格的任何內容。
我不使用情節提要超越嵌入導航視圖控制器。
以下是所有相關的代碼。
class WishListsViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
var tableView: UITableView = UITableView()
let tableCellId = "WishListsCell"
let collectionCellId = "WishListsCollectionViewCell"
override func viewDidLoad() {
super.viewDidLoad()
tableView.delegate = self
tableView.dataSource = self
tableView.backgroundColor = .white
tableView.register(WishListsCell.self, forCellReuseIdentifier: tableCellId)
self.view.addSubview(tableView)
tableView.translatesAutoresizingMaskIntoConstraints = false
tableView.topAnchor.constraint(equalTo: view.topAnchor).isActive = true
tableView.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive = true
tableView.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true
tableView.trailingAnchor.constraint(equalTo: view.trailingAnchor).isActive = true
}
func numberOfSections(in tableView: UITableView) -> Int {
return wishLists.count
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 1
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell{
let cell = tableView.dequeueReusableCell(withIdentifier: tableCellId, for: indexPath) as! WishListsCell
return cell
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 100
}
func tableView(_ tableView: UITableView,willDisplay cell: UITableViewCell,forRowAt indexPath: IndexPath) {
guard let tableViewCell = cell as? WishListsCell else { return }
//here setting the uitableview cell contains collectionview delgate conform to viewcontroller
tableViewCell.setCollectionViewDataSourceDelegate(dataSourceDelegate: self, forSection: indexPath.section)
tableViewCell.collectionViewOffset = storedOffsets[indexPath.row] ?? 0
}
func tableView(_ tableView: UITableView,didEndDisplaying cell: UITableViewCell,forRowAt indexPath: IndexPath) {
guard let tableViewCell = cell as? WishListsCell else { return }
storedOffsets[indexPath.row] = tableViewCell.collectionViewOffset
}
}
extension WishListsViewController: UICollectionViewDelegate , UICollectionViewDataSource, UICollectionViewDelegateFlowLayout {
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: collectionCellId, for: indexPath) as! WishListsCollectionViewCell
return cell
}
func collectionView(_ collectionView: UICollectionView,
layout collectionViewLayout: UICollectionViewLayout,
sizeForItemAt indexPath: IndexPath) -> CGSize {
return CGSize(width: 100, height: 100)
}
func collectionView(_ collectionView: UICollectionView,
layout collectionViewLayout: UICollectionViewLayout,
minimumInteritemSpacingForSectionAt section: Int) -> CGFloat {
return 1.0
}
func collectionView(_ collectionView: UICollectionView, layout
collectionViewLayout: UICollectionViewLayout,
minimumLineSpacingForSectionAt section: Int) -> CGFloat {
return 1.0
}
}
class WishListsCell: UITableViewCell {
private var collectionView: UICollectionView!
let cellId = "WishListsCollectionViewCell"
var collectionViewOffset: CGFloat {
get { return collectionView.contentOffset.x }
set { collectionView.contentOffset.x = newValue }
}
func setCollectionViewDataSourceDelegate<D: protocol<UICollectionViewDataSource, UICollectionViewDelegate>>
(dataSourceDelegate: D, forSection section : Int) {
collectionView.delegate = dataSourceDelegate
collectionView.dataSource = dataSourceDelegate
collectionView.tag = section
collectionView.reloadData()
}
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
}
override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
let layout: UICollectionViewFlowLayout = UICollectionViewFlowLayout()
collectionView = UICollectionView(frame: contentView.frame, collectionViewLayout: layout)
collectionView.translatesAutoresizingMaskIntoConstraints = false
collectionView.backgroundColor = .blue
collectionView.register(WishListsCollectionViewCell.self, forCellWithReuseIdentifier: cellId)
contentView.backgroundColor = .red
self.contentView.addSubview(collectionView)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
class WishListsCollectionViewCell: UICollectionViewCell {
var imageView: UIImageView
override init(frame: CGRect) {
imageView = UIImageView()
super.init(frame: frame)
contentView.addSubview(imageView)
imageView.translatesAutoresizingMaskIntoConstraints = false
imageView.contentMode = .scaleAspectFit
contentView.translatesAutoresizingMaskIntoConstraints = false
imageView.backgroundColor = .white
NSLayoutConstraint.activate([
NSLayoutConstraint(item: imageView, attribute: .width, relatedBy: .equal,
toItem: contentView, attribute: .width,
multiplier: 1.0, constant: 0.0),
NSLayoutConstraint(item: imageView, attribute: .height, relatedBy: .equal,
toItem: contentView, attribute: .height,
multiplier: 1.0, constant: 0.0),
])
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
