Delegate Challenge

gistfile1.txt

//
//  ViewController.swift
//  DelegateChallenge
//
//  Created by Kelly Egan on 4/7/15.
//  Copyright (c) 2015 Kelly Egan. All rights reserved.
//

import Foundation
import UIKit

class ViewController: UIViewController, UITextFieldDelegate {
    
    @IBOutlet weak var zipCodeTextField: UITextField!
    @IBOutlet weak var cashTextField: UITextField!
    @IBOutlet weak var lockedTextField: UITextField!
    
    @IBOutlet weak var textLockSwitch: UISwitch!
    
    let zipDelegate = ZIPTextFieldDelegate()
    let cashDelegate = CashTextFieldDelegate()

    override func viewDidLoad() {
        super.viewDidLoad()
        zipCodeTextField.delegate = zipDelegate
        cashTextField.delegate = cashDelegate
        lockedTextField.delegate = self
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    
    @IBAction func switchChanged(sender: UISwitch) {
        if( sender.on ) {
            lockedTextField.placeholder = "Free to type"
        } else  {
            lockedTextField.placeholder = "Unlock switch to type"
            lockedTextField.resignFirstResponder()
        }
    }
    
    //Unless the textLockSwitch is on don't begin editing
    func textFieldShouldBeginEditing(textField: UITextField) -> Bool {
        return textLockSwitch.on
    }
    


}

//
//  ZIPTextFieldDelegate.swift
//  DelegateChallenge
//
//  Created by Kelly Egan on 4/7/15.
//  Copyright (c) 2015 Kelly Egan. All rights reserved.
//

import UIKit
import Foundation

class ZIPTextFieldDelegate: NSObject, UITextFieldDelegate {
    func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange,replacementString string: String) ->Bool {
        
        //See what the new text would be
        var zipCode : NSString = textField.text
        zipCode = zipCode.stringByReplacingCharactersInRange(range, withString: string)
        
        //If the string is an integer (not nil) then check its length is less than or equal to five.
        if let zipCodeInt = String(zipCode).toInt() {
            return (zipCode.length <= 5)
        } else {
            return false
        }
    }
}

//
//  CashTextFieldDelegate.swift
//  DelegateChallenge
//
//  Created by Kelly Egan on 4/7/15.
//  Copyright (c) 2015 Kelly Egan. All rights reserved.
//

import UIKit

class CashTextFieldDelegate: NSObject, UITextFieldDelegate {
    
   func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange,replacementString string: String) -> Bool {
        let old : NSString = textField.text
        let new = old.stringByReplacingCharactersInRange( range, withString: string );
    
        let formatter = NSNumberFormatter()
        formatter.numberStyle = NSNumberFormatterStyle.CurrencyStyle
    
        var cents = 0

        //Strip out everything but digits
        for character in new {
            if let digit = String(character).toInt() {
                cents = cents * 10 + digit
            }
        }

        //Convert int cents to NSNumber dollars
        var dollars = NSNumber(double: Double(cents) / 100.0 )
    
        //Format dollars
        textField.text = formatter.stringFromNumber(dollars)
    
        return false
    }
}