A textfield delegate used to catch and throw messages related to textfield events

MNGTextFieldHandler.swift

//
//  MNGTextFieldHandler.swift
//  
//
//  Created by Tommie N. Carter, Jr., MBA on 6/18/15.
//  Copyright © 2015 MING Technology. All rights reserved.
//

import UIKit

struct MNGTextFieldEvents {
    static let NextButtonTappedForTextField = "MNGTextFieldHandler.NextButtonTappedForTextField"
}

class MNGTextFieldHandler: NSObject, UITextFieldDelegate {
    
    var fields:[UITextField]? = []
    
    func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool {
        return true
    }
    func textFieldDidBeginEditing(textField: UITextField) {
        textField.backgroundColor = UIColor.yellowColor()
    }
    func textFieldDidEndEditing(textField: UITextField) {
        textField.backgroundColor = UIColor.whiteColor()
    }
    func textFieldShouldBeginEditing(textField: UITextField) -> Bool {
        return true
    }
    func textFieldShouldClear(textField: UITextField) -> Bool {
        return false
    }
    func textFieldShouldEndEditing(textField: UITextField) -> Bool {
        return true
    }
    func textFieldShouldReturn(textField: UITextField) -> Bool {
        
        defaultCenter.postNotification(NSNotification(name: MNGTextFieldEvents.NextButtonTappedForTextField, object: textField))
        
        return false
    }
}

//private var kAssociationKeyNextField: UInt8 = 0
//
//extension UITextField {
//    @IBOutlet var nextField: UITextField? {
//        get {
//            return objc_getAssociatedObject(self, &kAssociationKeyNextField) as? UITextField
//        }
//        set(newField) {
//            objc_setAssociatedObject(self, &kAssociationKeyNextField, newField, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN)
//        }
//    }
//}