如何使用 UISearchBar 过滤类型为 [[String:String]] 的数组并显示为 String [英] How can I filter an array of type [[String:String]] using UISearchBar and display as String

问题描述

我解析了一个 JSON 数组，它给了我 [[String:String]] 然后我把它放到一个表视图中.

I have parsed a JSON array which gives me [[String:String]] which I then put into a table view.

我想使用 UISearchBar 来搜索数据，但遇到了麻烦，因为我不确定如何处理 [[String:String]] 格式.

I want to use a UISearchBar to be able to search the data, but am having trouble because I'm not sure how to deal with the [[String:String]] format.

我尝试创建另一个变量，将数组数据保存为 [String] 并且我可以过滤它，但我无法正确显示结果.对不起，如果这有点令人困惑，因为我在过去的几个小时里试图弄清楚它让自己感到困惑.谢谢！

I have tried creating another variable which holds the array data as [String] and I can filter it, but I can't display the results correctly. Sorry if this is a bit confusing as i have confused myself the last couple of hours trying to figure it out. Thank you!

import UIKit
import Alamofire
import SwiftyJSON

class StartViewController: UIViewController, UISearchBarDelegate, UITableViewDelegate, UITableViewDataSource {

    var names = [
        [String: String]
        ]()

    var isSearching = false
    var filteredData = [String]()


    @IBOutlet weak
    var tableView: UITableView!

    @IBOutlet weak
    var searchBar: UISearchBar!

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "cell",
                                                 for: indexPath)
        let name = names[indexPath.row]
        let text: String!

        // here I get 'Cannot assign value of type '[String : String]' to type 'String?''
        if isSearching {
            text = filteredData[indexPath.row]

        } else {
            text = nil
        }

        cell.textLabel ? .text = name["name"]
        cell.textLabel ? .textColor = UIColor.blue

        return cell
    }
}

这里有两个部分

func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {

    if searchBar.text == nil || searchBar.text == "" {

        isSearching = false

        view.endEditing(true)

        tableView.reloadData()
    } else {
        isSearching = true

        // and here I get 'Binary operator '==' cannot be applied to operands of type '[String : String]' and 'String?''
        filteredData = names.filter({
            $0 == searchBar.text
        })

        tableView.reloadData()
    }
}

感谢您的帮助.

//如果有帮助的话，这是我的解析函数

edit: // here is my parsing function if that helps at all

func parse(json: JSON) {
    for result in json[].arrayValue {
        let name = result["name"].stringValue
        let obj = ["name": name]

        names.append(obj)

    }
    tableView.reloadData()
}

}

推荐答案

为了能够显示完整数据和过滤数据，两个数组的类型必须相同.

To be able to display both full and filtered data both arrays must be of the same type.

var filteredData = [[String:String]]()

在 cellForRow 中使用依赖于 isSearching

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "cell",
                                             for: indexPath)

    let text : [String:String]
    if isSearching {
        text = filteredData[indexPath.row]
    } else {
        text = names[indexPath.row]
    }

    cell.textLabel?.text = text["name"]
    cell.textLabel?.textColor = UIColor.blue

    return cell
}

在 searchBar:searchDidChange 中，您必须通过一个键进行过滤，例如

In searchBar:searchDidChange you have to filter by a key for example

filteredData = names.filter({
     $0["name"] == searchBar.text
})

但是我建议使用自定义类或结构而不是字典.

However I recommend to use a custom class or struct rather than a dictionary.

这篇关于如何使用 UISearchBar 过滤类型为 [[String:String]] 的数组并显示为 String的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！