//
//  AddUpdateViewController.swift
//  UserDetails
//
//  Created by Chandra Rao on 06/12/17.
//  Copyright © 2017 Chandra Rao. All rights reserved.
//
import UIKit
import CoreData
class AddUpdateViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate, UIGestureRecognizerDelegate, UITextFieldDelegate {
@IBOutlet weak var imgUserImg: UIImageView!
@IBOutlet weak var txtFieldName: UITextField!
@IBOutlet weak var txtFieldEmail: UITextField!
@IBOutlet weak var txtFieldOtherDetails: UITextField!
@IBOutlet weak var btnSaveUpdate: UIButton!
let imagePicker = UIImagePickerController()
var tapGesture = UITapGestureRecognizer()
var user: [NSManagedObject] = []
var isUpdate : Bool = false
var ctrVariable : Int = 0
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
imagePicker.delegate = self
if isUpdate {
txtFieldName.text = user[0].value(forKey: “name”) as? String
txtFieldEmail.text = user[0].value(forKey: “email”) as? String
txtFieldOtherDetails.text = user[0].value(forKey: “others”) as? String
if let imageData = user[0].value(forKey: “image”) as? NSData {
if let image = UIImage(data:imageData as Data) {
imgUserImg.image = image
}
}
btnSaveUpdate.setTitle(“Update”, for: UIControlState.normal)
}
}
override func viewWillAppear(_ animated: Bool) {
configureImageView()
}
override func touchesEnded(_ touches: Set, with event: UIEvent?) {
view.endEditing(true)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: – Action Methods
@IBAction func btnSaveUpdateClicked(_ sender: Any) {
if check(forBlanks: txtFieldName) {
showAlert(withTitleMessageAndAction: “Alert!”, message: “Please enter valid text.” ,action: false)
} else if check(forBlanks: txtFieldEmail) {
showAlert(withTitleMessageAndAction: “Alert!”, message: “Please enter valid text.”, action: false)
} else if !check(forValidEmail: txtFieldEmail) {
showAlert(withTitleMessageAndAction: “Alert!”, message: “Please enter valid Email id.”, action: false)
} else if check(forBlanks: txtFieldOtherDetails) {
showAlert(withTitleMessageAndAction: “Alert!”, message: “Please enter valid Text.”, action: false)
} else {
if isUpdate {
updateRecord()
} else {
save(name: txtFieldName.text!, email: txtFieldEmail.text!, others: txtFieldOtherDetails.text!)
}
}
}
// MARK: – Database operation Methods
func save(name: String , email: String, others: String) {
guard let appDelegate = UIApplication.shared.delegate as? AppDelegate else {
return
}
ctrVariable = ctrVariable + 1
let managedContext = appDelegate.persistentContainer.viewContext
let entity = NSEntityDescription.entity(forEntityName: “User”, in: managedContext)!
let userObj = NSManagedObject(entity: entity, insertInto: managedContext)
userObj.setValue(ctrVariable, forKeyPath: “id”)
userObj.setValue(name, forKeyPath: “name”)
userObj.setValue(email, forKeyPath: “email”)
userObj.setValue(others, forKeyPath: “others”)
userObj.setValue(UIImageJPEGRepresentation(imgUserImg.image!, 1), forKey: “image”)
do {
try managedContext.save()
user.append(userObj)
showAlert(withTitleMessageAndAction: “Sucess!!”, message: “Your record has been saved sucessfully!!”, action: true)
} catch let error as NSError {
print(“Could not save. \(error), \(error.userInfo)”)
}
}
func updateRecord() {
guard let appDelegate = UIApplication.shared.delegate as? AppDelegate else {
return
}
let managedContext = appDelegate.persistentContainer.viewContext
let fetchRequest:NSFetchRequest = NSFetchRequest.init(entityName: “User”)
let predicate = NSPredicate(format: “id == ‘\(user[0].value(forKey: “id”) as! Int)'”)
fetchRequest.predicate = predicate
do{
let test = try managedContext.fetch(fetchRequest)
if test.count == 1
{
let objectUpdate = test[0] as! NSManagedObject
objectUpdate.setValue((user[0].value(forKey: “id”) as! Int), forKeyPath: “id”)
objectUpdate.setValue(txtFieldName.text!, forKey: “name”)
objectUpdate.setValue(txtFieldEmail.text!, forKey: “email”)
objectUpdate.setValue(txtFieldOtherDetails.text!, forKeyPath: “others”)
objectUpdate.setValue(UIImageJPEGRepresentation(imgUserImg.image!, 1), forKey: “image”)
do {
try managedContext.save()
showAlert(withTitleMessageAndAction: “Sucess!!”, message: “Your record has been updated sucessfully!!”, action: true)
} catch let error as NSError {
print(“Could not save. \(error), \(error.userInfo)”)
}
}
}
catch{
print(error)
}
}
// MARK: – UIGestureRecognizerDelegate Methods
@objc func handleTap(_ sender: UITapGestureRecognizer) {
let alertController = UIAlertController(title: “Alert!”, message: “PLease choose source.”, preferredStyle:UIAlertControllerStyle.actionSheet)
alertController.addAction(UIAlertAction(title: “Camera”, style: UIAlertActionStyle.default)
{ action -> Void in
// Put your code here
if UIImagePickerController.isSourceTypeAvailable(.camera) {
self.imagePicker.delegate = self
self.imagePicker.sourceType = .camera;
self.imagePicker.allowsEditing = false
self.present(self.imagePicker, animated: true, completion: nil)
} else {
self.showAlert(withTitleMessageAndAction: “Alert!”, message: “Camera not available.”, action: false)
}
})
alertController.addAction(UIAlertAction(title: “Photo Library”, style: UIAlertActionStyle.default)
{ action -> Void in
self.imagePicker.allowsEditing = true
self.imagePicker.sourceType = UIImagePickerControllerSourceType.photoLibrary
self.present(self.imagePicker, animated: true) {
}
})
self.present(alertController, animated: true) {
}
}
// MARK: – UIImagePickerControllerDelegate Methods
private func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject])
{
let chosenImage = info[UIImagePickerControllerOriginalImage] as! UIImage //2
imgUserImg.contentMode = .scaleAspectFit
imgUserImg.image = chosenImage
dismiss(animated:true, completion: nil)
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
if let image = info[UIImagePickerControllerOriginalImage] as? UIImage {
imgUserImg.image = image
dismiss(animated: true, completion: nil)
}
}
func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
}
// MARK: – Other Methods.
func check(forBlanks textfield: UITextField) -> Bool {
let rawString: String? = textfield.text
let whitespace = CharacterSet.whitespacesAndNewlines
let trimmed: String? = rawString?.trimmingCharacters(in: whitespace)
if (trimmed?.count ?? 0) == 0 {
return true
}
else {
return false
}
}
func check(forValidEmail textfield: UITextField) -> Bool {
let emailRegEx = “[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,64}”
let emailTest = NSPredicate(format:“SELF MATCHES %@”, emailRegEx)
print(emailTest.evaluate(with: textfield.text!))
return emailTest.evaluate(with: textfield.text!)
}
func showAlert(withTitleMessageAndAction title:String, message:String , action: Bool) {
let alert = UIAlertController(title: title, message: message, preferredStyle: UIAlertControllerStyle.alert)
if action {
alert.addAction(UIAlertAction(title: “Ok”, style: .default, handler: { (action : UIAlertAction!) in
self.navigationController?.popViewController(animated: true)
}))
} else{
alert.addAction(UIAlertAction(title: “Ok”, style: .default, handler: nil))
}
self.present(alert, animated: true, completion: nil)
}
func configureImageView() {
imgUserImg.layer.cornerRadius = imgUserImg.frame.size.width / 2
imgUserImg.layer.borderWidth = 3.0
imgUserImg.layer.borderColor = UIColor.lightGray.cgColor
tapGesture = UITapGestureRecognizer(target: self, action: #selector(AddUpdateViewController.handleTap(_:)))
tapGesture.delegate = self
tapGesture.numberOfTapsRequired = 1
tapGesture.numberOfTouchesRequired = 1
imgUserImg.addGestureRecognizer(tapGesture)
}
}