swift - 为什么我的 UITableView 滚动偏移在返回其 View 时最终位于 UISearchController 后面？

Question

Xcode 11.1、iOS 13.1

我很难弄清楚为什么 TableView 单元格最终出现在搜索栏后面。

我的设置:

override func viewDidLoad() {
    // Setup Eureka's UITableViewStyle to `Plain`  (like 'Contacts' app)
    // https://github.com/xmartlabs/Eureka/issues/218
    if tableView == nil {
        tableView = UITableView(frame: view.bounds, style: UITableView.Style.plain)
        tableView?.autoresizingMask = UIView.AutoresizingMask.flexibleWidth.union(.flexibleHeight)
        tableView.cellLayoutMarginsFollowReadableWidth = false
    }
    // *now* call super.
    super.viewDidLoad()

    // Add search bar
    searchController.searchResultsUpdater = self
    searchController.obscuresBackgroundDuringPresentation = false
    definesPresentationContext = true

    // Place the search bar in the navigation bar.
    self.navigationItem.searchController = self.searchController
    self.navigationItem.hidesSearchBarWhenScrolling = false
}

Answer 1

在tableView = UITableView(frame: view.bounds, style: UITableView.Style.plain)之后添加以下约束

tableView.translatesAutoresizingMaskIntoConstraints = false
tableView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor, constant: 0).isActive = true
tableView.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor, constant: 0).isActive = true
tableView.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor, constant: 0).isActive = true
tableView.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor, constant: 0).isActive = true