uitableview - 向 searchBar 添加索引

Question

需要帮助来更正此代码。
我有一个带有餐厅名称和地址的核心数据应用程序，有一个搜索栏，它正在运行。我要添加的是一个 Index 和一个 IndexTitle，如下图(箭头)所示。
非常欢迎任何帮助。提前致谢。

import UIKit
import CoreData

class DictionaryTableViewController: UITableViewController, NSFetchedResultsControllerDelegate, UISearchResultsUpdating
{
    var searchController:UISearchController!
    var searchResults:[Dictionary] = []

    private var dictionaryItems:[Dictionary] = []
    var fetchResultController:NSFetchedResultsController!

    override func viewDidLoad() {
        super.viewDidLoad()

    if let managedObjectContext = (UIApplication.sharedApplication().delegate as? AppDelegate)?.managedObjectContext {

            let fetchRequest = NSFetchRequest(entityName: "DictionaryEntity")
            do {
                dictionaryItems = try managedObjectContext.executeFetchRequest(fetchRequest) as! [Dictionary]
            } catch {
                print("Failed to retrieve record")
                print(error)
            }
        }

    searchController = UISearchController(searchResultsController: nil)
        tableView.tableHeaderView = searchController.searchBar
        searchController.searchResultsUpdater = self
        searchController.dimsBackgroundDuringPresentation = false

           tableView.estimatedRowHeight = 30.0
        tableView.rowHeight = UITableViewAutomaticDimension
    }


    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
}

    override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
        return 26
    }

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

        if searchController.active {
            return searchResults.count
        } else {
            return dictionaryItems.count
        }
    }

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

        let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as! DictionaryTableViewCell

        // Configure the cell...
        cell.wordLabel.text = dictionaryItems[indexPath.row].word
        cell.definitionSmallLabel.text = dictionaryItems[indexPath.row].definition

    let dictionary = (searchController.active) ? searchResults[indexPath.row]: dictionaryItems[indexPath.row]

        // Configure the cell...
        cell.wordLabel.text = dictionary.word
        cell.definitionSmallLabel.text = dictionary.definition
        return cell
    }
override func tableView(tableView: UITableView, titleForHeaderInSection section: Int) -> String? 
    {
        return "dictionaryItems\(section)"
    }

    override func tableView(tableView: UITableView, canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool {

           if searchController.active{
            return false
        }else{
            return true
        }
    }


override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        if segue.identifier == "showDictionaryDetail" {
            if let indexPath = tableView.indexPathForSelectedRow {
                let destinationController = segue.destinationViewController as! DictionaryDetailViewController
                destinationController.dictionary = (searchController.active) ? searchResults[indexPath.row] : dictionaryItems[indexPath.row]
                searchController.active = false
            }
        }
    }

        func updateSearchResultsForSearchController(searchController:
            UISearchController) {
                if let searchText = searchController.searchBar.text {
                    filterContentForSearchText(searchText)
                    tableView.reloadData()
                }
        }

        func filterContentForSearchText(searchText: String) {
            searchResults = dictionaryItems.filter({ (dictionary:Dictionary) -> Bool in
                let wordMatch = dictionary.word!.rangeOfString(searchText, options:
                    NSStringCompareOptions.CaseInsensitiveSearch)
                return wordMatch != nil
            })
        }
}

我想在我的 TableView 中拥有的是索引(左侧的箭头)和索引标题(右侧的箭头)。

Answer 1

您在 titleForHeaderInSection 的覆盖函数中有错别字

这是更正后的，注意 tableView 中的 v 是大写的:(复制粘贴我的代码)

override func tableView(tableView: UITableView, titleForHeaderInSection section: Int) -> String? {

}

我建议使用 Xcode 的自动完成功能。这样，您就不会陷入这样的隐患。

更新:您还需要提供这两种方法才能查看章节标题和章节索引标题。

override func sectionIndexTitlesForTableView(tableView: UITableView) -> [String]? {
    return ["A", "B", "C"]
}

override func tableView(tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
    return "A title for section: \(section)"
}

试试下面的代码:

class TableViewController: UITableViewController {

override func viewDidLoad() {
    super.viewDidLoad()

    tableView.registerClass(UITableViewCell.self, forCellReuseIdentifier: "Cell")
}

override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
    // #warning Incomplete implementation, return the number of sections
    return 9
}

override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    // #warning Incomplete implementation, return the number of rows
    return 9
}

override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath)

    // Configure the cell...
    cell.textLabel?.text = "\(indexPath.section+1)\(indexPath.row+1)"

    return cell
}

override func sectionIndexTitlesForTableView(tableView: UITableView) -> [String]? {
    return ["A", "C", "B"]
}

override func tableView(tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
    return "SECTION \(section+1)"
}