问题描述
我正在尝试创建一个自定义 UISearchBar，将其放置为 titleView 的 navigationController。使用以下代码，建议的 suggestionTableView 完美呈现；但是，它无法识别任何水龙头。事实上，就像 suggestionTableView 甚至不存在一样，因为我的点击被发送到建议 suggestionTableView 下的另一个视图。有人告诉我，我可以使用 hitTest(...) 来捕捉这些触摸，但我不知道如何在我的 SuggestionSearchBar 或 ViewController 中实现这一点。如何将这些触摸发送到 suggestionTableView？
建议搜索栏
class SuggestionSearchBar: UISearchBar,UISearchBarDelegate {
var suggestionTableView = UITableView(frame: .zero)
let allPossibilities: [String]!
var possibilities = [String]()
//let del: UISearchBarDelegate!
init(del: UISearchBarDelegate,dropDownPossibilities: [String]) {
self.allPossibilities = dropDownPossibilities
super.init(frame: .zero)
isUserInteractionEnabled = true
delegate = del
searchTextField.addTarget(self,action: #selector(searchBar(_:)),for: .editingChanged)
searchTextField.addTarget(self,action: #selector(searchBarCancelButtonClicked(_:)),for: .editingDidEnd)
sizeToFit()
addTableView()
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
private func addTableView() {
let cellHeight = UITableViewCell(style: UITableViewCell.CellStyle.default,reuseIdentifier: "").frame.height
suggestionTableView.register(UITableViewCell.self,forCellReuseIdentifier: "cell")
suggestionTableView.backgroundColor = UIColor.clear
//suggestionTableView.separatorStyle = .none
suggestionTableView.tableFooterView = UIView()
addSubview(suggestionTableView)
suggestionTableView.delegate = self
suggestionTableView.dataSource = self
suggestionTableView.translatesAutoresizingMaskIntoConstraints = false
NSLayoutConstraint.activate([
suggestionTableView.topAnchor.constraint(equalTo: bottomAnchor),suggestionTableView.rightAnchor.constraint(equalTo: rightAnchor),suggestionTableView.leftAnchor.constraint(equalTo: leftAnchor),suggestionTableView.heightAnchor.constraint(equalToConstant: cellHeight*6),])
hideSuggestions()
}
func showSuggestions() {
let sv = suggestionTableView.superview
sv?.clipsToBounds = false
suggestionTableView.isHidden = false
}
func hideSuggestions() {
suggestionTableView.isHidden = true
}
@objc func searchBar(_ searchBar: UISearchBar) {
print(searchBar.text?.uppercased() ?? "")
showSuggestions()
possibilities = allPossibilities.filter {$0.contains(searchBar.text?.uppercased() ?? "")}
print(possibilities.count)
suggestionTableView.reloadData()
if searchBar.text == "" || possibilities.count == 0 {
hideSuggestions()
}
}
@objc func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
hideSuggestions()
}
}
extension SuggestionSearchBar: UITableViewDataSource,UITableViewDelegate {
func tableView(_ tableView: UITableView,numberOfRowsInSection section: Int) -> Int {
return possibilities.count
}
func tableView(_ tableView: UITableView,cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = suggestionTableView.dequeueReusableCell(withIdentifier: "cell",for: indexPath)
cell.backgroundColor = UIColor(red: 0.25,green: 0.25,blue: 0.25,alpha: 0.75)
if traitCollection.userInterfaceStyle == .light {
cell.backgroundColor = UIColor(red: 1,green: 1,blue: 1,alpha: 0.75)
}
cell.textLabel?.text = possibilities[indexPath.row]
return cell
}
func tableView(_ tableView: UITableView,didSelectRowAt indexPath: IndexPath) {
//add method that fills in and searches based on the text in that indexpath.row
print("selected")
}
}
视图控制器
import UIKit
class ViewController: UIViewController {
lazy var searchBar = SuggestionSearchBar(del: self,dropDownPossibilities: ["red","green","blue","yellow"])
override func viewDidLoad() {
super.viewDidLoad()
setUpUI()
}
func setUpUI() {
setUpSearchBar()
}
}
extension ViewController: UISearchBarDelegate {
func setUpSearchBar() {
searchBar.searchBarStyle = UISearchBar.Style.prominent
searchBar.placeholder = "Search"
searchBar.sizeToFit()
searchBar.isTranslucent = false
searchBar.backgroundImage = UIImage()
searchBar.delegate = self
navigationItem.titleView = searchBar
}
func searchBarSearchButtonClicked(_ searchBar: UISearchBar) {
print(searchBar.text!)
}
func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
searchBar.endEditing(true)
}
func searchBar(_ searchBar: UISearchBar,textDidChange searchText: String) {
}
}
解决方法
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