搜索功能在透明的 UITableView 中实现，但它不工作。任何帮助表示赞赏

Question

` 这是我用代码实现搜索功能的代码。没有使用故事板。我运行该程序并看到了搜索栏。我尝试搜索元素但没有出现。我将代码调试为“PO Searching”-> 我得到的响应是“False” 所以我知道搜索功能代码没有在“索引路径处的行的单元格”中执行我尽力调试代码。我找不到代码中的错误。我怎么解决这个问题？我哪里不见了。感谢任何帮助..

这是我用代码实现搜索功能的代码。没有使用故事板。我运行该程序并看到了搜索栏。我尝试搜索元素但没有出现。我将代码调试为“PO Searching”-> 我得到的响应是“False” 所以我知道搜索功能代码没有在“索引路径处的行的单元格”中执行我尽力调试代码。我找不到代码中的错误。我怎么解决这个问题？我哪里不见了。任何帮助表示赞赏..`

import UIKit

class Cell : UITableViewCell {
}

class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, UISearchBarDelegate{
  
    @IBOutlet weak var selectFruit: UIButton! 
    
    let transparentView = UIView()
    let tableView = UITableView()
    var button = UIButton()
    
    var data = [String]()
    
    var searchFruit = [String]()
    var searching : Bool = false
    
    override func viewDidLoad() {
        super.viewDidLoad()
        tableView.delegate = self
        tableView.dataSource = self

// Register the Cell

        tableView.register(Cell.self, forCellReuseIdentifier: "Cell")
    }
      
// Adding the transparent View to show array elements
  
    func addTransparentView(frame : CGRect) {
        transparentView.frame = self.view.frame
        self.view.addSubview(transparentView)
        tableView.frame = CGRect(x: frame.origin.x, y: frame.origin.y + frame.height, width: frame.width, height: 0)
        
// Implementing Search bar functionality 

        var searchBar : UISearchBar = UISearchBar()
        searchBar.sizeToFit()
        searchBar = UISearchBar(frame: CGRect(x: 10, y: 20, width: tableView.frame.width-20, height: tableView.frame.height-20))
        searchBar.searchBarStyle = UISearchBar.Style.prominent
        searchBar.placeholder = " Search..."
        searchBar.sizeToFit()
        searchBar.isTranslucent = false
        searchBar.backgroundImage = UIImage()
        searchBar.delegate = self
               
        self.view.addSubview(tableView)
        tableView.addSubview(searchBar)
        tableView.layer.cornerRadius = 5
        transparentView.backgroundColor = UIColor.black.withAlphaComponent(0.9)
        tableView.reloadData()
        
        let tapgesture = UITapGestureRecognizer(target: self, action: #selector(deleteTransparentView))
        transparentView.addGestureRecognizer(tapgesture)
        transparentView.alpha = 0
        
// Animating the transparent view 

        UIView.animate(withDuration: 0.4, delay: 0.0, usingSpringWithDamping: 1.0, initialSpringVelocity: 1.0, options: .curveEaseInOut, animations: {
            self.transparentView.alpha = 0.5
            self.tableView.frame = CGRect(x: frame.origin.x, y: frame.origin.y + frame.height + 5, width: frame.width, height: CGFloat(self.data.count * 50))
        }, completion: nil)
    }
    
    @objc func deleteTransparentView() {
        let frame = button.frame
        UIView.animate(withDuration: 0.4, delay: 0.0, usingSpringWithDamping: 1.0, initialSpringVelocity: 1.0, options: .curveEaseInOut, animations: {
            self.transparentView.alpha = 0
            self.tableView.frame = CGRect(x: frame.origin.x, y: frame.origin.y + frame.height, width: frame.width, height: 0)
        }, completion: nil)
    }
   
// Action methods along with array elements 
    @IBAction func selectFruit(_ sender: Any) {
        data = ["Apple","Apple1","Apple2","Apple3","Apple4","Oranges","Ape","Banana","Grapes","Kiwi","Kite","JackFruit"]
        button = selectFruit
        addTransparentView(frame: selectFruit.frame)
    }
    
    // MARK:- TableView Methods
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        if searching {
          return searchFruit.count
        } else {
            return data.count
        }
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
        if searching {
            cell.textLabel?.text = searchFruit[indexPath.row]
        } else {
            cell.textLabel?.text = data[indexPath.row]
        }
        return cell
    }
    
    func searchBar(_ searchBar: UISearchBar, textDidChange textSearched: String) {
        searchFruit = data.filter({[=10=].prefix(textSearched.count) == textSearched})
    }
    
    func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
        return 50
    }
    
    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        button.setTitle(data[indexPath.row], for: .normal)
        deleteTransparentView()
    }
}

Answer 1

您必须设置 searching 为真并重新加载 table。

func searchBar(_ searchBar: UISearchBar, textDidChange textSearched: String) {
    searchFruit = data.filter({[=10=].prefix(textSearched.count) == textSearched})
    
        searching = !searchFruit.isEmpty
        tableView.reloadData()

}

Answer 2

您必须在 textDidChange 中相应地设置 searching 并且有一种更有效的方法来过滤数据

func searchBar(_ searchBar: UISearchBar, textDidChange textSearched: String) {
    if textSearched.isEmpty {
        searching = false
        searchFruit.removeAll()
    } else {
        searching = true
        searchFruit = data.filter{[=10=].range(of: textSearched, options: [.caseInsenitive, .anchored]) != nil}
    }
    tableView.reloadData()
}

搜索功能在透明的 UITableView 中实现，但它不工作。任何帮助表示赞赏

Search Functionality Implemented in a transparent UITableView but it is not working. Any help is appreciated

swift

swift4

swift5