Dictionary search the key and get the value - swift

Question

I got a plist object which contains all the words key=english and value=malay and I assigned in to 2 different arrays which is english and malay. Now I want a textfield where I want to search the english word and print the malay word in the label.
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")
}
}
}
the output I expecting is textfield(Bus) which is english word then in the label show me the malay word(Bas)

Answer 1

You have a plist file as a Dictionary. So you can get the dictionary object from the plist file and already answer here.
Make a structure for better data binding.
struct Word {
var english: String
var malay: String
}
Then declare an array of words globally in your ViewController.
var words: [Word] = [] // An empty array
In viewDidLoad: fetch data from plist file.
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 {
guard let plistObject = try PropertyListSerialization.propertyList(from: plistData, options: [], format: nil) as? [String: String] else {
// Plist is not [String: String]
return
}
// Here you need to change the code. Converting the dictionary into struct array
var words: [Word] = plistObject.map {Word(english: $0.key, malay: $0.value)}
/// Then sort by english word if needed
words.sorted {$0.english < $1.english}
} catch {
print("Error Serialize")
}
} else {
print("Error reading data")
}
} else {
print("Property list")
}
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return words.count
}
Update your cell data as well.
cell!.textLabel!.text = words[indexPath.row].english
cell!.detailTextLabel?.text = words[indexPath.row].malay
And your button action with minor modification:
#IBAction func searchBtn(_ sender: UIButton) {
let result = words.filter {$0.english == searchedText}
if let word = result.first {
selectedLabel.text = word.malay
} else {
selectedLabel.text = "" // No data found
}
}
You can replace $0.english == searchedText with {$0.english.contains(searchedText)} if you want to filter with contains, But in that case you might get the multiple result. I assume that in your case you need it as a translator so use ==.

Answer 2

Why don't you search in your plist object? I think it is simpler
#IBAction func searchBtn(_ sender: UIButton) {
guard let words = plistObject as? [String: String], let key = searchText.text else { return }
selectedLabel.text = words[key] ?? ""
}
Something like this.