Trigger action from another swift class - ios

Question

I'm making a TextField which takes a proper date only. Now when I'm using the text field delegate and action methods in the same ViewController class in which my UITextField is, it is working fine. But, I have to make it like a reusable component which can be used in any project by drag and drop. I have two files - MakeDate.swift and ViewController.swift
MakDate.swift --
import Foundation
import UIKit
class MakeDate: NSObject, UITextFieldDelegate {
var textField: UITextField!
var string: String!
var viewController: UIViewController!
let characterset = NSCharacterSet(charactersInString: "0123456789")
init?(textField: UITextField!) {
self.textField = textField
}
func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool {
self.string = string
return true
}
func takeProperDateInput() {
textField.addTarget(textField, action: #selector(self.textChange(_:)), forControlEvents: .EditingChanged)
}
#IBAction func textChange(sender: UITextField) {
print("\(sender.text!)")
print("\(sender.text!) && \(self.string)")
if self.string == "" {
if sender.text?.characters.count == 2 {
let index = sender.text?.endIndex.advancedBy(-2)
sender.text = sender.text?.substringToIndex(index!)
}
else if sender.text?.characters.count == 5 {
let index = sender.text?.endIndex.advancedBy(-2)
sender.text = sender.text?.substringToIndex(index!)
}
}
if sender.text?.characters.count == 1 && self.string != "" {
if self.string.rangeOfCharacterFromSet(characterset.invertedSet) != nil {
let index = sender.text?.endIndex.advancedBy(-1)
sender.text = sender.text?.substringToIndex(index!)
}
else if Int(sender.text!) != 1 && Int(sender.text!) != 0 {
sender.text = "0" + sender.text! + "/"
}
}
else if sender.text?.characters.count == 2 && self.string != "" {
if Int(string) != 1 && Int(string) != 2 && Int(string) != 0{
let index = sender.text?.endIndex.advancedBy(-1)
sender.text = sender.text?.substringToIndex(index!)
}else {
sender.text = sender.text! + "/"
}
}
else if sender.text?.characters.count == 4 && self.string != "" {
if self.string.rangeOfCharacterFromSet(characterset.invertedSet) != nil {
let index = sender.text?.endIndex.advancedBy(-1)
sender.text = sender.text?.substringToIndex(index!)
}
}
else if sender.text?.characters.count == 5 && self.string != "" {
if self.string == "/" {
var yearComponent = sender.text?.componentsSeparatedByString("/")
let index = sender.text?.endIndex.advancedBy(-2)
sender.text = sender.text?.substringToIndex(index!)
sender.text = sender.text! + "0" + yearComponent![1] + "/"
}else {
var yearComponent = sender.text?.componentsSeparatedByString("/")
if Int(yearComponent![1]) > 31 {
let index = sender.text?.endIndex.advancedBy(-1)
sender.text = sender.text?.substringToIndex(index!)
}else if Int(yearComponent![1]) > 0 && Int(yearComponent![1]) < 32 {
sender.text = sender.text! + "/"
}else {
let index = sender.text?.endIndex.advancedBy(-1)
sender.text = sender.text?.substringToIndex(index!)
}
}
}
else if sender.text?.characters.count == 10 && self.string != "" {
let index = sender.text?.endIndex.advancedBy(-4)
if sender.text?.substringFromIndex(index!).rangeOfCharacterFromSet(characterset.invertedSet) != nil {
let index = sender.text?.endIndex.advancedBy(-4)
sender.text = sender.text?.substringToIndex(index!)
} else {
var yearComponent = sender.text?.componentsSeparatedByString("/")
if Int(yearComponent![2]) == 0 {
let index = sender.text?.endIndex.advancedBy(-4)
sender.text = sender.text?.substringToIndex(index!)
}
}
}
else if sender.text?.characters.count > 10 && self.string != "" {
let index = sender.text?.endIndex.advancedBy(-1)
sender.text = sender.text?.substringToIndex(index!)
}
}
}
and ViewController.swift --
import UIKit
class ViewController: UIViewController, UITextFieldDelegate {
#IBOutlet weak var dateInsert: UITextField!
var dateMaker: MakeDate!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
dateMaker = MakeDate(textField: self.dateInsert)
self.dateInsert.delegate = self.dateMaker
self.dateMaker.takeProperDateInput()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
The error i get is unrecognized selector sent to instance

Answer 1

Create a textfield class with the default properties and implement in the view controller not a nsobject to send a textfield as parameter:
class baseTextfield: UITextField, UITextFieldDelegate {
}
class ViewController: UIViewController{
#IBOutlet weak var dateInsert: UIBaseTextField!
}
The properties are of the textfield, not of the view.