Lab9- CDpeople(image)

ZTCYING

May 4th, 2024

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//
// AppDelegate.swift
// CD People
//
// Created by stabirca on 21/03/2021.
//
import UIKit
import CoreData
@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.
}
// MARK: - Core Data stack
lazy var persistentContainer: NSPersistentContainer = {
/*
The persistent container for the application. This implementation
creates and returns a container, having loaded the store for the
application to it. This property is optional since there are legitimate
error conditions that could cause the creation of the store to fail.
*/
let container = NSPersistentContainer(name: "CD_People")
container.loadPersistentStores(completionHandler: { (storeDescription, error) in
if let error = error as NSError? {
// Replace this implementation with code to handle the error appropriately.
// fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
/*
Typical reasons for an error here include:
* The parent directory does not exist, cannot be created, or disallows writing.
* The persistent store is not accessible, due to permissions or data protection when the device is locked.
* The device is out of space.
* The store could not be migrated to the current model version.
Check the error message to determine what the actual problem was.
*/
fatalError("Unresolved error \(error), \(error.userInfo)")
}
})
return container
}()
// MARK: - Core Data Saving support
func saveContext () {
let context = persistentContainer.viewContext
if context.hasChanges {
do {
try context.save()
} catch {
// Replace this implementation with code to handle the error appropriately.
// fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
let nserror = error as NSError
fatalError("Unresolved error \(nserror), \(nserror.userInfo)")
}
}
}
}
//
// SceneDelegate.swift
// CD People
//
// Created by stabirca on 21/03/2021.
//
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.
// Save changes in the application's managed object context when the application transitions to the background.
(UIApplication.shared.delegate as? AppDelegate)?.saveContext()
}
}
//
// PeopleTableViewController.swift
// CD People
//
// Created by stabirca on 21/03/2021.
//
import UIKit
import CoreData
class PeopleTableViewController: UITableViewController, NSFetchedResultsControllerDelegate {
// core data objects and functions
let context = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext
var pManagedObject : People! = nil
var pEntity : NSEntityDescription! = nil
var frc : NSFetchedResultsController<NSFetchRequestResult>! = nil
func makeRequest() -> NSFetchRequest<NSFetchRequestResult>{
let request = NSFetchRequest<NSFetchRequestResult>(entityName: "People")
// define predicates and sorters
let sorter = NSSortDescriptor(key: "name", ascending: true)
request.sortDescriptors = [sorter]
return request
}
override func viewDidLoad() {
super.viewDidLoad()
// frc gets the data from People
frc = NSFetchedResultsController(fetchRequest: makeRequest(), managedObjectContext: context, sectionNameKeyPath: nil, cacheName: nil)
frc.delegate = self
do{
try frc.performFetch()
}catch{
print("CD CANNOT FETCH")
}
}
func controllerDidChangeContent(_ controller: NSFetchedResultsController<NSFetchRequestResult>) {
tableView.reloadData()
}
// MARK: - Table view data source
override func numberOfSections(in tableView: UITableView) -> Int {
// #warning Incomplete implementation, return the number of sections
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of rows
return frc.sections![section].numberOfObjects
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
// Configure the cell...
pManagedObject = (frc.object(at: indexPath) as! People)
cell.textLabel?.text = pManagedObject.name
cell.detailTextLabel?.text = pManagedObject.phone
return cell
}
// Override to support conditional editing of the table view.
override func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
// Return false if you do not want the specified item to be editable.
return true
}
// Override to support editing the table view.
override func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath: IndexPath) {
if editingStyle == .delete {
// Delete the row from the data source
pManagedObject = frc.object(at: indexPath) as! People
context.delete(pManagedObject)
do{
try context.save()
}catch{
print("CD CONTEXT CANNOT SAVE")
}
do{
try frc.performFetch()
}catch{
print("CD CANNOT FETCH")
}
tableView.reloadData()
}
}
/*
// Override to support rearranging the table view.
override func tableView(_ tableView: UITableView, moveRowAt fromIndexPath: IndexPath, to: IndexPath) {
}
*/
/*
// Override to support conditional rearranging of the table view.
override func tableView(_ tableView: UITableView, canMoveRowAt indexPath: IndexPath) -> Bool {
// Return false if you do not want the item to be re-orderable.
return true
}
*/
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "cellSegue"{
// get the data from frc of indexPath
let indexPath = tableView.indexPath(for: sender as! UITableViewCell)
pManagedObject = frc.object(at: indexPath!) as! People
// push to AddPersonController
let destination = segue.destination as! AddPersonViewController
destination.pManagedObject = self.pManagedObject
}
}
}
//
// AddPersonViewController.swift
// CD People
//
// Created by stabirca on 21/03/2021.
//
import UIKit
import CoreData
class AddPersonViewController: UIViewController {
// outlets and action
@IBOutlet weak var nameTF: UITextField!
@IBOutlet weak var phoneTF: UITextField!
@IBOutlet weak var addressTF: UITextField!
@IBOutlet weak var emailTF: UITextField!
@IBOutlet weak var imageTF: UITextField!
@IBAction func addUpdateAction(_ sender: Any) {
if pManagedObject == nil{save()}
else {update()}
navigationController?.popViewController(animated: true)
}
// core data objects and functions
let context = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext
var pManagedObject : People! = nil
var pEntity : NSEntityDescription! = nil
override func viewDidLoad() {
super.viewDidLoad()
// setup the TF-s
if pManagedObject != nil{
nameTF.text = pManagedObject.name
phoneTF.text = pManagedObject.phone
addressTF.text = pManagedObject.address
emailTF.text = pManagedObject.email
imageTF.text = pManagedObject.image
}
}
// function to deal with data
func update(){
// update the pManagedObject
pManagedObject.name = nameTF.text
pManagedObject.phone = phoneTF.text
pManagedObject.address = addressTF.text
pManagedObject.email = emailTF.text
pManagedObject.image = imageTF.text
do{
try context.save()
}catch{
print("CD CONTEXT CANNOT SAVE")
}
}
func save(){
// create a new managed object
pEntity = NSEntityDescription.entity(forEntityName: "People", in: context)
pManagedObject = People(entity: pEntity, insertInto: context)
// update the pManagedObject
pManagedObject.name = nameTF.text
pManagedObject.phone = phoneTF.text
pManagedObject.address = addressTF.text
pManagedObject.email = emailTF.text
pManagedObject.image = imageTF.text
do{
try context.save()
}catch{
print("CD CONTEXT CANNOT SAVE")
}
}
}

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