的viewController 1： =====================>
進口CoreData
類的ViewController：UIViewController的{
@IBOutlet weak var txt_user: UITextField!
@IBOutlet weak var txt_password: UITextField!
var result = NSArray()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
txt_password.isSecureTextEntry = true
}
@IBAction func login_action(_ sender: Any)
{
if(txt_user.text == "" || txt_password.text == "")
{
let alert = UIAlertController(title: "info", message: "fields are empty", preferredStyle: .alert)
let ok = UIAlertAction(title: "OK", style: .default, handler: nil)
alert.addAction(ok)
self.present(alert, animated: true, completion: nil)
}
else
{
self.CheckForUserNameAndPasswordMatch(empName: txt_user.text! , empPwd: txt_password.text!)
}
}
func CheckForUserNameAndPasswordMatch(empName:String,empPwd:String)
{
let app = UIApplication.shared.delegate as! AppDelegate
let context = app.persistentContainer.viewContext
let fetchdata = NSFetchRequest<NSManagedObject>(entityName: "Employee")
let predicate = NSPredicate(format: "empName = %@",empName)
fetchdata.predicate = predicate
do
{
self.result = try context.fetch(fetchdata as! NSFetchRequest<NSFetchRequestResult>)as NSArray
if result.count>0
{
let objcetEntity = result.firstObject as! Employee
if objcetEntity.empName == empName && objcetEntity.empPwd == empPwd
{
print("Login Successfully")
// Entered Username & password matched
}
else
{
print("Wrong password/username")
//Wrong password/username
}
}
}
catch let error as NSError
{
print("error",error.localizedDescription)
}
}
@IBAction func unwindToVC1(sender:UIStoryboardSegue)
{
if sender.source is ViewController2
{
let secvc = sender.source as! ViewController2
txt_password.text = secvc.str1! as String
}
}
的viewController 2：
=====================>
CLAS小號ViewController2：UIViewController中，UITextFieldDelegate {
@IBOutlet weak var txt_name: UITextField!
@IBOutlet weak var txt_mail: UITextField!
@IBOutlet weak var txt_pwd: UITextField!
@IBOutlet weak var txt_cpwd: UITextField!
@IBOutlet weak var txt_phone: UITextField!
@IBOutlet weak var err: UILabel!
var str1:NSString!
var str2:NSString!
//var update:NSManagedObject!
override func viewDidLoad() {
super.viewDidLoad()
/*if(update != nil)
{
txt_name.text = update.value(forKey: "empName") as? String
txt_mail.text = update.value(forKey: "empMail") as? String
txt_pwd.text = update.value(forKey: "empPwd") as? String
txt_cpwd.text = update.value(forKey: "empCpwd") as? String
txt_phone.text = update.value(forKey: "empPhone") as? String
}*/
txt_pwd.isSecureTextEntry = true
txt_cpwd.isSecureTextEntry = true
}
override func viewWillAppear(_ animated: Bool)
{
txt_name.becomeFirstResponder()
}
@IBAction func regis_clicked(_ sender: Any)
{
if(txt_name.text == "" || txt_mail.text == "" || txt_pwd.text == "" || txt_cpwd.text == "" || txt_phone.text == "")
{
let alert = UIAlertController(title: "information", message: "fields are empty", preferredStyle: .alert)
let ok = UIAlertAction(title: "OK", style: .default, handler:
{
(actionsheet) in
if(self.txt_name.text == "")
{
self.txt_name.becomeFirstResponder()
}
if(self.txt_mail.text == "")
{
self.txt_mail.becomeFirstResponder()
}
if(self.txt_pwd.text == "")
{
self.txt_pwd.becomeFirstResponder()
}
if(self.txt_cpwd.text == "")
{
self.txt_cpwd.becomeFirstResponder()
}
if(self.txt_phone.text == "")
{
self.txt_phone.becomeFirstResponder()
}
})
let cancel = UIAlertAction(title: "cancel", style: .default, handler: nil)
alert.addAction(ok)
alert.addAction(cancel)
self.present(alert, animated: true, completion: nil)
}
else if(txt_pwd.text != txt_cpwd.text)
{
let alert1 = UIAlertController(title: "information", message: "password mismatched", preferredStyle: .alert)
let ok = UIAlertAction(title: "OK", style: .default, handler:nil)
let cancel = UIAlertAction(title: "cancel", style: .default, handler: nil)
alert1.addAction(ok)
alert1.addAction(cancel)
self.present(alert1, animated: true, completion: nil)
}
else
{
let app = UIApplication.shared.delegate as! AppDelegate
let context = app.persistentContainer.viewContext
let newuser = NSEntityDescription.insertNewObject(forEntityName: "Employee", into: context)
newuser.setValue(txt_name.text, forKey: "empName")
newuser.setValue(txt_mail.text, forKey: "empMail")
newuser.setValue(txt_pwd.text, forKey: "empPwd")
newuser.setValue(txt_cpwd.text, forKey: "empCpwd")
newuser.setValue(txt_phone.text, forKey: "empPhone")
do
{
try context.save()
}
catch let error as NSError
{
print("error",error.localizedDescription)
}
}
// self.navigationController?.popViewController(animated: true)
performSegue(withIdentifier: "unwind", sender: self)
}
覆蓋FUNC準備（對於SEGUE：UIStoryboardSegue，發件人：任何）
{
if let newlabel = txt_pwd.text
{
str1 = newlabel as NSString
}
}
美麗！謝謝！ – Alberto93