Question

我得到一个plist对象，其中包含所有单词key=english和value=malay，然后分配给2个不同的数组，分别为english和malay。现在我想要一个textfield，我想在其中搜索english单词并在malay中打印label单词。

import UIKit

class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate, UITextFieldDelegate {

@IBOutlet weak var selectedLabel: UILabel!
@IBOutlet weak var searchText: UITextField!
@IBOutlet weak var wordTable: UITableView!
var english = [String]()
var malay = [String]()
var words: [String: String] = [:]
override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
    wordTable.dataSource = self
    wordTable.delegate = self
    searchText.delegate = self

    if let path = Bundle.main.path(forResource: "words", ofType: "plist"){
        if let plistData = FileManager.default.contents(atPath: path){
            do {
                let plistObject = try PropertyListSerialization.propertyList(from: plistData, options: PropertyListSerialization.ReadOptions(), format: nil)
                words = (plistObject as? [String: String])!
                english = [String] (words.keys)
                malay = [String] (words.values)

            } catch {
                print("Error Serialize")
            }
        } else {
            print("Error reading data")
        }
    } else {
        print("Property list")
    }
}

func numberOfSections(in tableView: UITableView) -> Int {
    return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return english.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    var cell: UITableViewCell!
    cell = tableView.dequeueReusableCell(withIdentifier: "tabelCell")
    if cell == nil {
        cell = UITableViewCell(
            style: UITableViewCellStyle.value2,
            reuseIdentifier: "tableCell")
        print("creating a table cell")
    }
    cell!.textLabel!.text = english[indexPath.row]
    cell!.detailTextLabel?.text = malay[indexPath.row]
    return cell!

}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    selectedLabel.text = malay[indexPath.row]

}
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
    // Hide the keyboard
    textField.resignFirstResponder()
    return true
}


@IBAction func searchBtn(_ sender: UIButton) {
    let result = words.filter {$0.key == searchText.text}
    if result.count > 0 {
        print(result)
        selectedLabel.text! = result.values //error

    } else {
        print("Not found")
    }
}

}

我期望的输出是textfield(Bus)，即english个字，然后在label中向我显示malay个字（基本）

Answer 1

为什么不搜索plist对象？我认为这很简单

    @IBAction func searchBtn(_ sender: UIButton) {
        guard let words = plistObject as? [String: String], let key = searchText.text else { return }
        selectedLabel.text = words[key] ?? ""
    }

这样的事情。

Answer 2

搜索不需要使用两个不同的arrays。 filter和dictionary都可以使用array方法。因此，假设在字典示例下面：

let plist = ["apple": "red", "orange": "orange", "banana": "yellow", "grapes": "green", "pineapple": "light yellow"]

并且搜索键为"app"，所以

let searchedText = "app"
let result = plist.filter {$0.key == searchedText}
if result.count > 0 {
    print(result)
} else {
    print("Not found")
}

输出：[“苹果”：“红色”]

字典搜索关键字并获取值

2 个答案: