mobile programming using swift programming

//
// ViewController.swift
// Password Manager
//
import UIKit
let BUTTON_SPACING = 10
let BUTTON_HEIGHT = 40
class ViewController: UIViewController {

@IBOutlet weak var webField: UITextField!
@IBOutlet weak var passField: UITextField!
@IBOutlet weak var AddButton: UIButton!
@IBOutlet weak var scrollView: UIScrollView!

var fileURL = NSURL()

var dict = [String : String]()

var ButtonArray : [UIButton] = []
var InfoArray : [UIButton] = []

@IBAction func clearAll(sender: AnyObject) {
dict.removeAll()
ButtonArray.removeAll()
InfoArray.removeAll()
//NSKeyedArchiver.archiveRootObject(dict, toFile: fileURL.path!)

do {
let data = try NSKeyedArchiver.archivedData(withRootObject: dict, requiringSecureCoding: false)
try data.write(to: fileURL as URL)
} catch {
print(“Couldn’t write file”)
}

refreshList()
}

@IBAction func AddPassword(sender: AnyObject) {
//dict[“http://www.abc.com”]=”123″
//dict[“http://www.tamuc.org”]=”leo”

webField.resignFirstResponder()
passField.resignFirstResponder()

let key: String = webField.text!

let value: String = passField.text!

if value.count == 0 || key.count == 0 {
return
}
// exit from the method
if dict[key] == nil {
// test if the website is not in Dictionary yet
dict[key] = value
} else {
// if not, overrode

}
// add a new entry in tags
webField.text = “http://www.”
// clear tagField of text
passField.text = nil

do {
let data = try NSKeyedArchiver.archivedData(withRootObject: dict, requiringSecureCoding: false)
try data.write(to: fileURL as URL)
} catch {
print(“Couldn’t write file”)
}

print(“saved”)

addNewButtonWithTitle(title: key)

}

// create a new button programmatically

@objc func buttonTouched(sender: UIButton) {
let urlString: String = sender.titleLabel!.text!
// get Button’s text
let url: NSURL = NSURL(string: urlString)!
UIApplication.shared.open(url as URL, completionHandler: nil)
}

func addNewButtonWithTitle(title: String) {

let button: UIButton = UIButton()

// give the button the title of the tag
button.setTitle(title, for: .normal) // for normal
//button.titleLabel?.textAlignment = .Left

button.backgroundColor = UIColor.darkGray
button.layer.borderColor = UIColor.black.cgColor
button.layer.borderWidth = 0.5;
button.layer.cornerRadius = 10.0;

// tell the button to call buttonTouched: when it is touched

button.addTarget(self, action: #selector (ViewController.buttonTouched(sender:)) ,for: .touchUpInside)

// add the UIButton to the end of the array

ButtonArray.append(button)

ButtonArray = ButtonArray.sorted { $0.titleLabel!.text! < $1.titleLabel!.text! } let newHeight: Float = Float((ButtonArray.count) * (BUTTON_HEIGHT + BUTTON_SPACING) ) + Float (BUTTON_SPACING) let contentSize: CGSize = CGSize(width: scrollView.frame.size.width, height: CGFloat(newHeight)) scrollView.contentSize = contentSize refreshList() } @objc func infoButtonTouched(sender: UIButton) { // get the index of the button that was touched let index: Int = InfoArray.index(of: sender)! // get the title of the button let key: String = ButtonArray[index].titleLabel!.text! webField.text = key let value: String = dict[key]! passField.text = value // update queryField with the value } func refreshList() { // remove all the buttons from the GUI let subviews = scrollView.subviews as [UIView] for v in subviews { if let button = v as? UIButton { button.removeFromSuperview() } } InfoArray.removeAll() var buttonOffset: CGFloat = CGFloat(BUTTON_SPACING) // reset the spacing // repopulate the scroll view with buttons for button: UIButton in ButtonArray { var buttonFrame: CGRect = button.frame // fetch the frame of button buttonFrame.origin.x = CGFloat(BUTTON_SPACING) // set the x-coordinate buttonFrame.origin.y = buttonOffset // set the y-coordinate // button width is the size of the view minus padding on each side buttonFrame.size.width = 300 buttonFrame.size.height = CGFloat(BUTTON_HEIGHT) // set the height of button button.frame = buttonFrame // assign the new frame to button print("X:", BUTTON_SPACING, " Y:", buttonOffset, " W: ", buttonFrame.size.width, " H: ", BUTTON_HEIGHT) scrollView.addSubview(button) let infoButton: UIButton = UIButton(type: .detailDisclosure) InfoArray.append(infoButton) // position button to the right of the button we just added buttonFrame = infoButton.frame // fetch the frame of infoButton buttonFrame.origin.x = 340 // this button is a bit shorter than normal buttons, so we adjust buttonFrame.origin.y = buttonOffset + 10 infoButton.frame = buttonFrame // assign the new frame // make the button call infoButtonTouched: when it is touched // infoButton.addTarget(self, action: Selector("infoButtonTouched(_:)"), forControlEvents: .TouchUpInside) infoButton.addTarget(self, action:#selector(ViewController.infoButtonTouched(sender:)), for: .touchUpInside) scrollView.addSubview(infoButton) buttonOffset += CGFloat(BUTTON_HEIGHT + BUTTON_SPACING) } } override func viewDidLoad() { super.viewDidLoad() let documentsURL = FileManager.default.urls(for: umentDirectory, in: .userDomainMask)[0] print(documentsURL) fileURL = documentsURL.appendingPathComponent("passwords.plist") as NSURL let fileManager = FileManager.default //check if file exists if(!fileManager.fileExists(atPath: fileURL.path!)) { print("passwords.plist is not found with filemanager") do { let data = try NSKeyedArchiver.archivedData(withRootObject: dict, requiringSecureCoding: false) try data.write(to: fileURL as URL) } catch { print("Couldn't write file") } } else // file is found, no need to { // read from file do { let dict_data = try Data(contentsOf: fileURL as URL) print(dict_data) do { dict = try NSKeyedUnarchiver.unarchiveTopLevelObjectWithData(dict_data) as! [String : String] } catch { print("Couldn't read file.") } } catch { print("Couldn't open data file.") } print(dict.count, " passwords found ") for pair in dict { print(String(pair.0) + " for " + (pair.1)) // for console output addNewButtonWithTitle(title: String(pair.0)) } } webField.text = "http://www." } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() // Dispose of any resources that can be recreated. } }

Instructions

Similar to Password Manager apps, you need to develop a similar app using Scroll View, buttons, text field to keep emails. The button positions in the scroll view should be in two-column format (big emails, small delete buttons), as seen below. The buttons should be big enough to fill the width of screen appropriately. The email addresses should be sorted. Once the user touches an email button, the app should forward to this address to Mail and an “compose” view should be appear on the device (remember UIApplication.sharedApplication().openURL(url) from Password Manager App). if Mail app is not setup in the simulator, then it does not starts giving an error, it is an acceptable status. The X (delete) button should delete the email address next to it.

 
Requirements: Use iOS 12 as deployment target, and make sure that your project compatible with Xcode 10.