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Magic 8 Ball Tutorial in Swift
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// NOTE: This Magic 8 Ball Tutorial in Swift is for my personal reference | |
// teaching students at theCoderSchool in Flower Mound, TX | |
// This isn't a full blown application, just two swift files | |
// combined into one github gist for reference when assisting | |
// students with their "Magic 8 Ball" assignment. This app consists | |
// of one view containing a label, a text field, and a button. | |
// Users enter their question into the text field and then press | |
// the button to submit their question. The app then answers the user | |
// using a simple UIAlertController (alert/dialog popup). Students | |
// need to connect the button from their main storyboard to the | |
// ViewController using an IBAction. See the ViewController and Model | |
// swift files below: | |
// | |
// ViewController.swift | |
// Mystic 9 Ball | |
// | |
// Created by Christopher Pedersen on 7/2/18. | |
// Copyright © 2018 Christopher Pedersen. All rights reserved. | |
// | |
import UIKit | |
class ViewController: UIViewController, UITextFieldDelegate { | |
override func viewDidLoad() { | |
super.viewDidLoad() | |
// Do any additional setup after loading the view, typically from a nib. | |
self.questionTextField.delegate = self | |
} | |
override func didReceiveMemoryWarning() { | |
super.didReceiveMemoryWarning() | |
// Dispose of any resources that can be recreated. | |
} | |
// Hide Keyboard Code by "The Swift Guy" and is from the public domain | |
// REFERENCE: https://www.youtube.com/watch?v=l-Uup2lKw1Y | |
// Hide Keyboard When User Touches The Screen | |
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) { | |
self.view.endEditing(true) // hide keyboard when user touches screen | |
} | |
// Hide Keyboard When User Presses Return Key on Keyboard | |
func textFieldShouldReturn(_ textField: UITextField) -> Bool { | |
questionTextField.resignFirstResponder() | |
return(true) | |
} | |
var mysticModel = MysticModel() | |
func displayFortune(using fortune: String) { | |
// REFERENCE (UIAlertViewController): https://developer.apple.com/documentation/uikit/uialertcontroller | |
let alert = UIAlertController(title: "Mystic 9 Ball says...", message: fortune, preferredStyle: .alert) | |
alert.addAction(UIAlertAction(title: NSLocalizedString("OK", comment: "Default action"), style: .default, handler: { _ in | |
NSLog("The \"OK\" alert occured.") | |
})) | |
self.present(alert, animated: true, completion: nil) | |
} | |
@IBOutlet weak var questionTextField: UITextField! | |
@IBAction func onAskButtonClick(_ sender: Any) { | |
let randomNumber = Int(arc4random_uniform(2)) | |
self.displayFortune(using: mysticModel.fortune[randomNumber]) | |
questionTextField.text = "" // clear text field so user can ask a new question | |
} | |
} | |
// | |
// MysticModel.swift | |
// Mystic 9 Ball | |
// | |
// Created by Christopher Pedersen on 7/2/18. | |
// Copyright © 2018 Christopher Pedersen. All rights reserved. | |
// | |
import Foundation | |
class MysticModel { | |
var fortune: [String] = [] | |
init() { | |
fortune.append("Yes!") | |
fortune.append("No.") | |
} | |
} |
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