导航栏中的UISearchController无法在iOS 11上正确隐藏

Question

我想在点击后隐藏导航栏

navigationController?.hidesBarsOnTap = true

点击qazxsw poi后导航栏正常隐藏

但是在添加了一个searchController之后（下面的代码）

我的视图（青色）无法正确延伸

let searchController = UISearchController(searchResultsController: nil)
navigationItem.searchController = searchController

我也试过旋转它。出现搜索栏。

Answer 1

终于找到了解决方案

override func viewDidLoad() {
    super.viewDidLoad()

    navigationController?.barHideOnTapGestureRecognizer.addTarget(self, action: #selector(barHideAction(_:)))
    let searchController = UISearchController(searchResultsController: nil)
    navigationItem.searchController = searchController
    navigationItem.hidesSearchBarWhenScrolling = false
    navigationController?.hidesBarsOnTap = true
}

@objc func barHideAction(_ guesture: UITapGestureRecognizer) {
    updateFrame()
}

func updateFrame() {
    if let nc = navigationController {
        let isHidden = nc.isNavigationBarHidden
        searchController.searchBar.superview?.isHidden = isHidden

        if isHidden {
            self.additionalSafeAreaInsets.top = -64 // fixed by a magic num
        }
        else {
            self.additionalSafeAreaInsets.top = 0
        }
    }
}