tableView和scrollView之间连续滚动

Question

我有一个带有uiview标头和表格视图的父滚动视图。我正在尝试与Twitter或Instagram个人资料页具有类似的行为。您开始滚动父滚动视图，并且标题消失后，就会从滚动视图滚动到表格视图进行continuous过渡，而无需抬起手指并将其放在表格视图上。现在，当前行为有些陈旧。在滚动视图内容偏移量超过标题之后，我必须抬起手指并将其放在表格视图上才能开始滑动表格视图。

MainViewController

    import UIKit
    import XLPagerTabStrip

    class MainViewController: UIViewController {

        lazy var headerViewController: UIViewController = {
            let header = UIViewController()
            return header
        }()

        lazy var bottomViewControllers: BottomPageViewController = {
            let bvc = BottomPageViewController()
            return bvc
        }()

        lazy var scrollView: UIScrollView = {
            let sv = UIScrollView()
            sv.delegate = self
            sv.showsVerticalScrollIndicator = false
            sv.bounces = true
            sv.bounces = false
            return sv
        }()


    override func viewDidLoad() {
        super.viewDidLoad()
        self.view.addSubview(scrollView)
        let f = UIScreen.main.bounds
        scrollView.frame = CGRect(x: f.minX, y: f.minY, width: f.width, height: f.height)

        add(headerViewController, to: scrollView, frame: CGRect(x: 0, y: 0, width: f.width, height: 150))
        add(bottomViewControllers, to: scrollView, frame: CGRect(x: 0, y: headerViewController.view.bounds.height, width: f.width, height: f.height))
        scrollView.contentSize = CGSize(width: f.width, height: f.height * 2)

        if let vcs = bottomViewControllers.viewControllers as? [BottomViewController] {
            for vc in vcs {
                vc.delegate = self
            }
        }
    }

}

extension MainViewController: UIScrollViewDelegate {
    func scrollViewDidScroll(_ scrollView: UIScrollView) {
        guard let controllers = bottomViewControllers.viewControllers as? [BottomViewController] else { return }
        let selectedController = controllers[bottomViewControllers.currentIndex]
        if self.scrollView == scrollView {
            selectedController.tableView.isScrollEnabled = self.scrollView.contentOffset.y >= 150
            print(scrollView.contentOffset.y)
            scrollView.isScrollEnabled = !selectedController.tableView.isScrollEnabled
            bottomViewControllers.view.frame.origin.y = max(150, scrollView.contentOffset.y)
        }


    }
}

extension MainViewController: CustomScrollDelegate {
    func tableViewScroll(_ viewController: BottomViewController) {
        print(viewController.tableView.contentOffset.y)
        viewController.tableView.isScrollEnabled = viewController.tableView.contentOffset.y > 0
    }
}

BottomViewController

import UIKit
import XLPagerTabStrip

protocol CustomScrollDelegate {
    func tableViewScroll(_ viewController: BottomViewController)
}

class BottomViewController: UITableViewController {

    var pageTitle: String?
    var pageIndex: Int = 0
    var delegate: CustomScrollDelegate?

    override func viewDidLoad() {
        super.viewDidLoad()
        self.view.backgroundColor = .red
        self.tableView.isUserInteractionEnabled = false
        self.tableView.bounces = true
        self.tableView.showsVerticalScrollIndicator = true
        self.tableView.register(UITableViewCell.self, forCellReuseIdentifier: "TETST")
    }

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        guard let cell = tableView.dequeueReusableCell(withIdentifier: "TETST", for: indexPath) as? UITableViewCell else { return UITableViewCell() }
        return cell
    }

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return 1000
    }

    override func scrollViewDidScroll(_ scrollView: UIScrollView) {
        delegate?.tableViewScroll(self)
    }

    init(pageTitle: String, pageIndex: Int) {
        self.pageTitle = pageTitle
        self.pageIndex = pageIndex
        super.init(nibName: nil, bundle: nil)
    }

    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

}

extension BottomViewController: IndicatorInfoProvider {
    func indicatorInfo(for pagerTabStripController: PagerTabStripViewController) -> IndicatorInfo {
        return IndicatorInfo.init(title: pageTitle ?? "Tab \(pageIndex)")
    }
}

Answer 1

您应该简单地将标题作为标题添加到UITableView（而不是节标题！），并使其与UITableView的其余部分一起滚动：How to scroll the header along with the UITableView?

也可以将UITableView链接直接设置为contentSize的高度，这样UITableView本身根本不会滚动，就像这样：Resizing UITableView to fit content

这完全取决于您是否通过分页等方式动态添加行，解决方案的复杂程度。但是我认为您大多数时候只需在正确的模式下设置UITableView标头即可达到目标]