iOS Lab 1

lab1.md

In this lab, you will experiment with Objective C fundamentals in a Mac terminal application that does not display any user interface. Everything you do in this lab is applicable to iOS as well – we will not use any API that is not available in iOS.

Begin by creating an Xcode project of type OS X > Application > Command Line Tool. (In the Type combo box, select “Foundation” if it isn’t selected.) Add classes as necessary per the instructions below using File > New > File, OS X > Cocoa > Objective C Class.

Implement a PlayingCard class that has the following methods, initializers, and properties:

• NSString* suit property
• NSUInteger rank property (valid values are 1-13, where 1 = “Ace”, …, 13 = “King”)
• NSString* contents read-only property that returns the card name (e.g. “Jack of Spades”)
• (NSArray *)validSuits class method that returns an array of valid suits (“Diamonds”, “Hearts”, “Spades”, “Clubs”)
• (NSArray *)validRanks method that returns an array of valid ranks (1-13) – you might need the [NSNumber numberWithUnsignedInteger:] class method here, or use the @ literal syntax
• Initializer: (id)initWithRank:(NSUInteger)rank suit:(NSString *)suit which checks that the rank and suit are valid

Implement a Deck class that has the following methods:

• (void)addCard:(PlayingCard *)card – stores the card in an NSMutableArray
• (PlayingCard *)drawRandomCard – draws a random card from the array; use the arc4random() method to obtain a random number. Remove the card before returning it.

Implement a PlayingDeck class that derives from Deck.

• In its init method, add all 52 playing cards to the deck.
• Make sure you use the [Card validSuits] and [Card validRanks] methods.

Test your code by creating a PlayingDeck instance in the main.m file, drawing a few random cards, and using the NSLog function to print out the cards’ contents.