Lab4- MultipleConverter

ZTCYING

May 4th, 2024

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//
// AppDelegate.swift
// MultipleConverter
//
// Created by Sabin Tabirca on 06/02/2024.
//
import UIKit
@main
class AppDelegate: UIResponder, UIApplicationDelegate {
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
return true
}
// MARK: UISceneSession Lifecycle
func application(_ application: UIApplication, configurationForConnecting connectingSceneSession: UISceneSession, options: UIScene.ConnectionOptions) -> UISceneConfiguration {
// Called when a new scene session is being created.
// Use this method to select a configuration to create the new scene with.
return UISceneConfiguration(name: "Default Configuration", sessionRole: connectingSceneSession.role)
}
func application(_ application: UIApplication, didDiscardSceneSessions sceneSessions: Set<UISceneSession>) {
// Called when the user discards a scene session.
// If any sessions were discarded while the application was not running, this will be called shortly after application:didFinishLaunchingWithOptions.
// Use this method to release any resources that were specific to the discarded scenes, as they will not return.
}
}
//
// SceneDelegate.swift
// MultipleConverter
//
// Created by Sabin Tabirca on 06/02/2024.
//
import UIKit
class SceneDelegate: UIResponder, UIWindowSceneDelegate {
var window: UIWindow?
func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
// Use this method to optionally configure and attach the UIWindow `window` to the provided UIWindowScene `scene`.
// If using a storyboard, the `window` property will automatically be initialized and attached to the scene.
// This delegate does not imply the connecting scene or session are new (see `application:configurationForConnectingSceneSession` instead).
guard let _ = (scene as? UIWindowScene) else { return }
}
func sceneDidDisconnect(_ scene: UIScene) {
// Called as the scene is being released by the system.
// This occurs shortly after the scene enters the background, or when its session is discarded.
// Release any resources associated with this scene that can be re-created the next time the scene connects.
// The scene may re-connect later, as its session was not necessarily discarded (see `application:didDiscardSceneSessions` instead).
}
func sceneDidBecomeActive(_ scene: UIScene) {
// Called when the scene has moved from an inactive state to an active state.
// Use this method to restart any tasks that were paused (or not yet started) when the scene was inactive.
}
func sceneWillResignActive(_ scene: UIScene) {
// Called when the scene will move from an active state to an inactive state.
// This may occur due to temporary interruptions (ex. an incoming phone call).
}
func sceneWillEnterForeground(_ scene: UIScene) {
// Called as the scene transitions from the background to the foreground.
// Use this method to undo the changes made on entering the background.
}
func sceneDidEnterBackground(_ scene: UIScene) {
// Called as the scene transitions from the foreground to the background.
// Use this method to save data, release shared resources, and store enough scene-specific state information
// to restore the scene back to its current state.
}
}
//
// ViewController.swift
// MultipleConverter
//
// Created by Sabin Tabirca on 06/02/2024.
//
import UIKit
class ViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource {
// picker view methods
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return currencyNames.count
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
return currencyNames[row]
}
// outlets and actions
@IBOutlet weak var fromTextField: UITextField!
@IBOutlet weak var toTextField: UITextField!
@IBOutlet weak var fromPicker: UIPickerView!
@IBOutlet weak var toPicker: UIPickerView!
@IBAction func clearAction(_ sender: UIButton) {
// clear the text fields
fromTextField.text = ""
toTextField.text = ""
// reset the pickers
fromPicker.selectRow(0, inComponent: 0, animated: true)
toPicker.selectRow(0, inComponent: 0, animated: true)
}
@IBAction func convertAction(_ sender: UIButton) {
// get the selected indices from pickers
let fromIndex = fromPicker.selectedRow(inComponent: 0)
let toIndex = toPicker.selectedRow(inComponent: 0)
// calculate the rate
let rate = currencyRates[toIndex]/currencyRates[fromIndex]
// do convertion
let fromAmount = Double(fromTextField.text!)!
let toAmount = convert(amount: fromAmount, rate: rate)
toTextField.text = String(format: "%.2lf", toAmount)
}
// user vars and methods
let currencyNames = ["EUR", "USD", "UKP", "RON", "CNY", "INR", "TRY"]
let currencyRates = [1.0, 1.23, 0.89, 5.12, 7.50, 89.15, 32.12]
func convert(amount:Double, rate:Double)->Double{
return amount * rate
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup for the pickers
fromPicker.delegate = self
fromPicker.dataSource = self
toPicker.delegate = self
toPicker.dataSource = self
}
}

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