具有约束的嵌套集合视图的意外行为（Swift 4）

我在tableview中有一个包含水平分页集合视图的单元格。

在此集合视图的每个页面内都有一个垂直集合视图。

为了避免“滚动滚动”问题，我在垂直集合视图中禁用了垂直滚动。

垂直集合视图的单元格数不是静态的，可以是任何数字。

因此，这会产生一个问题：集合视图（您必须要求我澄清哪一个）不再适合进入表视图的单元格。

为了解决这个问题，我通过更改故事板中的约束来更改表格视图的单元格高度……但问题仍然存在。

这是一张有助于说明问题的图片：

这是我的代码：

class myTBViewController: UITableViewController , UICollectionViewDelegate , UICollectionViewDataSource , UICollectionViewDelegateFlowLayout { func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int { if collectionView.tag == 10 { return 2 } else { return 30 } } func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell { if collectionView.tag == 10 { let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "mainPages", for: indexPath) as! mainPages cell.backgroundColor = UIColor.yellow cell.listCV.clipsToBounds = true return cell } else { let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "showAdvCell", for: indexPath) as! showAdvCell cell.backgroundColor = UIColor.red return cell } } func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets { if collectionView.tag == 10 { let collectionViewHeight = collectionView.frame.height let itemsHeight = collectionView.contentSize.height let topInset = ( collectionViewHeight - itemsHeight ) / 4 return UIEdgeInsetsMake(topInset ,0, 0 , 0) } else { let collectionViewHeight = collectionView.frame.height let itemsHeight = CGFloat(80) let topInset = ( collectionViewHeight - itemsHeight ) / 4 return UIEdgeInsetsMake(topInset ,0, 0 , 0) } } var headerSegment = UISegmentedControl() override func viewDidLoad() { super.viewDidLoad() headerSegment.frame = CGRect(x: 0, y: 200, width: UIScreen.main.bounds.width, height: 30) let items = ["فروشگاه ها", "دیوار"] headerSegment = UISegmentedControl(items: items) headerSegment.selectedSegmentIndex = 0 headerSegment.addTarget(self, action: #selector(selectPage), for: UIControlEvents.valueChanged) let frame = CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: 200) let headerImageView = UIImageView(frame: frame) let image: UIImage = UIImage(named: "1")! headerImageView.image = image let frame3 = CGRect(x: 0, y: 0, width: 80, height: 80) let headerImageView2 = UIImageView(frame: frame3) let image2: UIImage = UIImage(named: "1")! headerImageView2.image = image2 headerSegment.addSubview(headerImageView2) headerSegment.bringSubview(toFront: headerImageView2) headerImageView2.center = CGPoint(x: UIScreen.main.bounds.width / 2, y: 200) headerSegment.frame = CGRect(x: 0, y: 200, width: UIScreen.main.bounds.width + 10 , height: 40) headerSegment.center = CGPoint(x: UIScreen.main.bounds.width / 2, y: 200) let mainView = UIView(frame: CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: 230)) let headerSegmentView = UIView(frame : CGRect(x: 0, y: 200, width: UIScreen.main.bounds.width, height: 40)) headerSegmentView.center = headerSegment.center headerSegmentView.backgroundColor = UIColor.white mainView.addSubview(headerImageView) mainView.bringSubview(toFront: headerImageView) mainView.addSubview(headerSegmentView) mainView.bringSubview(toFront: headerSegmentView) mainView.addSubview(headerSegment) mainView.bringSubview(toFront: headerSegment) mainView.addSubview(headerImageView2) mainView.bringSubview(toFront: headerImageView2) self.tableView.tableHeaderView = mainView headerImageView2.layer.borderWidth = 2 headerImageView2.layer.masksToBounds = false headerImageView2.layer.borderColor = UIColor.init(white: 255/255, alpha: 0.3).cgColor headerImageView2.layer.cornerRadius = headerImageView2.frame.height/2 headerImageView2.clipsToBounds = true } @objc func selectPage() { let cell = self.tableView.dequeueReusableCell(withIdentifier: "myTBViewCell") as! myTBViewCell switch headerSegment.selectedSegmentIndex { case 0: print("0") cell.myTBCollectionView.scrollToItem(at:IndexPath(item: 0, section: 0), at: .top, animated: false) case 1: print("1") cell.myTBCollectionView.scrollToItem(at:IndexPath(item: 1, section: 0), at: .top, animated: false) default: print("0") cell.myTBCollectionView.scrollToItem(at:IndexPath(item: 0, section: 0), at: .top, animated: false) } } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() // Dispose of any resources that can be recreated. } override func numberOfSections(in tableView: UITableView) -> Int { // #warning Incomplete implementation, return the number of sections return 1 } override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { // #warning Incomplete implementation, return the number of rows return 1 } override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat { tableView.estimatedRowHeight = 200 tableView.rowHeight = UITableViewAutomaticDimension return 600 } override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { let cell = self.tableView.dequeueReusableCell(withIdentifier: "myTBViewCell", for: indexPath) as! myTBViewCell return cell } }