用 UITableView 实现 UISearchController

Posted 2023-03-13

【中文标题】用 UITableView 实现 UISearchController

【英文标题】：Implement UISearchController with UITableView

【发布时间】：2015-06-15 17:35:44

【问题描述】：

只是想知道用于Raywenderlich Tutorial 的代码如何添加UISearchController 以及如何将它与UITableViewController 一起使用我似乎无法让它工作，有人告诉我它可能已在 ios 8.0 中弃用，有人知道如何继续这样做吗？

UISearchController 内置于 UIViewController 而不是故事板！

【参考方案1】：

UISearchDisplayController 已弃用并由UISearchController 取代。它在iOS 8.0 及更高版本中可用。

UISearchController 类定义了一个接口，用于管理 显示与搜索结果一致的搜索栏 控制器的内容。搜索结果控制器，一个 由 searchResultsController 指定的 UIViewController 对象 属性，管理搜索结果

https://developer.apple.com/library/prerelease/ios/documentation/UIKit/Reference/UISearchController/index.html

这是一个示例，我如何使用 UITableView 来处理 UIViewController..如果您想使用 UITableViewController，只需进行一些更改...

import UIKit

class ViewController: UIViewController , UITableViewDataSource, UITableViewDelegate,UISearchResultsUpdating 


    @IBOutlet weak var tblView: UITableView!

    var tabledata = ["lucques","chickendijon","godaddy","amazon","chris","ambata","bankofamerica","abelcine","AUTO + TRANSPORTATION","BILLS + UTILITIES","FOOD + DINING","HEALTH","AutoCare", "Auto Payment" , "Gas+Fuel","Electric Bill", "Internet/Television","Fast Foodd", "Gorceries" , "Restaurants","Gym Membership", "Health Insurance","auto","note-bullet","knife","heart"]

    var filteredTableData = [String]()

    var resultSearchController = UISearchController()



    override func viewDidLoad() 
        super.viewDidLoad()

        tblView.delegate = self
        tblView.dataSource = self

        self.resultSearchController = (

            let controller = UISearchController(searchResultsController: nil)
            controller.searchResultsUpdater = self
            controller.dimsBackgroundDuringPresentation = false
            controller.searchBar.sizeToFit()
            controller.searchBar.barStyle = UIBarStyle.Black
            controller.searchBar.barTintColor = UIColor.whiteColor()
            controller.searchBar.backgroundColor = UIColor.clearColor()
            self.tblView.tableHeaderView = controller.searchBar


            return controller


        )()
        self.tblView.reloadData()

    

    override func didReceiveMemoryWarning() 
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    


     func numberOfSectionsInTableView(tableView: UITableView) -> Int 

        return 1

    



     func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int 

        if self.resultSearchController.active 


           return self.filteredTableData.count

        else


            return self.tabledata.count



        

    



     func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell 

        var section = indexPath.section
        var row = indexPath.row
        let cell: UITableViewCell = UITableViewCell(style: UITableViewCellStyle.Default, reuseIdentifier:"addCategoryCell")
        cell.selectionStyle =  UITableViewCellSelectionStyle.None
        cell.backgroundColor = UIColor.clearColor()
        cell.contentView.backgroundColor = UIColor.clearColor()
        cell.textLabel?.textAlignment = NSTextAlignment.Left
        cell.textLabel?.textColor = UIColor.blackColor()
        cell.textLabel?.font = UIFont.systemFontOfSize(14.0)

        if self.resultSearchController.active 

              cell.textLabel?.text = filteredTableData[indexPath.row]


        else

                 cell.textLabel?.text = tabledata[indexPath.row]

        

        return cell

    


    func updateSearchResultsForSearchController(searchController: UISearchController) 

        filteredTableData.removeAll(keepCapacity: false)

        let searchPredicate = NSPredicate(format: "SELF CONTAINS[c] %@", searchController.searchBar.text)

        let array = (tabledata as NSArray).filteredArrayUsingPredicate(searchPredicate)
        filteredTableData = array as! [String]

        self.tblView.reloadData()



    

【讨论】：

还有一种方法可以添加它，以便在显示 UISearchController 时仍显示单元格，因为此时单元格不会显示，直到您输入要搜索的名称，否则谢谢！ :D @anishparajuli