在 UISearchController 中隐藏搜索栏上的取消按钮

Question

我试图在 UISearchController 中隐藏搜索栏的取消按钮，但不幸的是，在 viewDidLoad() 中设置以下内容不起作用：

override func viewDidLoad() {
    super.viewDidLoad()

    searchResultsTableController = UITableViewController()
    searchResultsTableController.tableView.delegate = self

    searchController = UISearchController(searchResultsController: searchResultsTableController)
    searchController.searchResultsUpdater = self
    searchController.searchBar.sizeToFit()
    searchResultsView.tableHeaderView = searchController.searchBar

    searchController.delegate = self
    searchController.dimsBackgroundDuringPresentation = false
    searchController.searchBar.delegate = self

    searchController.searchBar.searchBarStyle = .Minimal
    searchController.searchBar.showsCancelButton = false

    definesPresentationContext = true
}

我也试过在这个委托方法中使用上面的代码：

func didPresentSearchController(searchController: UISearchController) {
    searchController.searchBar.showsCancelButton = false
}

这种方法可行，但会在隐藏之前短暂显示“取消”按钮，这并不理想。有什么建议吗？

Answer 1

隐藏搜索栏委托方法中的“取消”按钮并设置您的委托searchController.searchBar.delegate=selfUISearchBarDelegate

func searchBarTextDidBeginEditing(searchBar: UISearchBar) {

}

func searchBarTextDidEndEditing(searchBar: UISearchBar) {

}

Answer 2

尝试继承 UISearchBar 并实现：

override func layoutSubviews() {
   super.layoutSubviews()
   self.setShowsCancelButton(false, animated: false)
}

这篇可能会在这方面对您有更多帮助。

Answer 3

我最终按照建议对 UISearchBar 和 UISearchController 进行了子类化：

CustomSearchBar.swift

import UIKit

class CustomSearchBar: UISearchBar {

    override func layoutSubviews() {
        super.layoutSubviews()
        setShowsCancelButton(false, animated: false)
    }
}

CustomSearchController.swift

import UIKit

class CustomSearchController: UISearchController, UISearchBarDelegate {

    lazy var _searchBar: CustomSearchBar = {
        [unowned self] in
        let result = CustomSearchBar(frame: CGRectZero)
        result.delegate = self

        return result
    }()

    override var searchBar: UISearchBar {
        get {
            return _searchBar
        }
    }
}

Answer 4

与@Griffith 和@Abhinav 给出的答案相同，但使用扩展名：

extension UISearchBar {
    override open func layoutSubviews() {
        super.layoutSubviews()
        setShowsCancelButton(false, animated: false)
    }
}

此代码来自Swift 4.

Answer 5

高兴！从 iOS 13 开始，可以在 UISearchController 上访问 automaticallyShowsCancelButton。将其设置为 false 以隐藏取消按钮。

Answer 6

func didPresentSearchController(_ searchController: UISearchController) {
    searchController.searchBar.becomeFirstResponder()
    searchController.searchBar.showsCancelButton = true
}


func didDismissSearchController(_ searchController: UISearchController) {
    searchController.searchBar.showsCancelButton = false
}

就我而言，上述所有解决方案都有效。你需要在 didPresentSearchController 中显示，在 didDismissSearchController 中隐藏。早些时候我只是躲在 didDismissSearchController 中，它仍然显示取消按钮。

在 UISearchController 中隐藏搜索栏上的取消按钮

Hiding Cancel button on search bar in UISearchController

ios

swift

uisearchcontroller

ios9