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在 UISearchController 中隐藏搜索栏上的取消按钮

[英]Hiding Cancel button on search bar in UISearchController

我试图隐藏 UISearchController 中搜索栏的取消按钮,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
}

这种方法有效,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?

我最终按照建议对UISearchBarUISearchController了子类化:

自定义搜索栏.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
        }
    }
}

麾! 从 iOS 13 开始,可以访问UISearchController上的automaticallyShowsCancelButton 将其设置为false以隐藏取消按钮。

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。 您需要在 didPresentSearchController 中显示并在 didDismissSearchController 中隐藏它。 早些时候我只是躲在 didDismissSearchController 中,它仍然在取消时显示取消按钮。

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=self UISearchBarDelegate

func searchBarTextDidBeginEditing(searchBar: UISearchBar) {

}

func searchBarTextDidEndEditing(searchBar: UISearchBar) {

}

尝试UISearchBar并实现:

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

这个SO 线程可能会在这个方向上为您提供更多帮助。

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。

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