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
}
这种方法有效但在隐藏之前会短暂显示取消按钮,这并不理想.有什么建议？
解决方法
我按照建议继承了UISearchBar和UISearchController的子类：
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
}
}
}