Objective-C 101

 NSString *myString = @"This is my NSString";

    NSString *myString2 = @"This is another NSString";

    NSLog(@"I have just NSLogged this string: %@ ++ %@", myString, myString2);

    

    int i = 10;

    float x = 17.6;

    NSLog(@"This is another NSLog string with %i and %f", i + 200, x);

    

    NSString *userString = @"28";

    NSLog(@"The sum of userString and 10 is %i", [userString intValue] + 10);

    

    NSString *fourthObject = @"Fourth";

    NSArray *myArray = [NSArray arrayWithObjects:@"First", @"Second", @"Third", fourthObject, nil];

    NSLog(@"My array is %@", myArray);

    NSLog(@"The 2nd item in the array is %@", [myArray objectAtIndex:1]);

    

    NSMutableArray *myMutantArray = [NSMutableArray arrayWithObject:@"One"];

    [myMutantArray addObject:@"Two"];

    NSLog(@"My updated array becomes %@", myMutantArray);

    NSLog(@"Location of 'two' is %i",[myMutantArray indexOfObject:@"Two"]);

    [myMutantArray addObjectsFromArray:myArray];

    NSLog(@"My updated array becomes %@", myMutantArray);

    

    NSDictionary *gameData = [NSDictionary dictionaryWithObjectsAndKeys:

                              @"9340", @"highScore",

                              @"10", @"numLivesLeft",

                              @"plasma rifle", @"currentWeapon", nil];

    NSLog(@"Printing game data...%@", gameData);

    NSLog(@"What is my current weapon? %@", [gameData objectForKey:@"currentWeapon"]);

- (IBAction)buttonPressed:(id)sender {

    

    int r = rand();

    

    UIAlertView *alert = [[UIAlertView alloc]

                          initWithTitle:@"Hello World Title!"

                          message:[NSString stringWithFormat:@"Congrats! I have launched the msg!This is my random number: %i", r]

                          delegate:nil

                          cancelButtonTitle: @"CancelButton"

                          otherButtonTitles: nil];

    

    [alert show];

}

@interface Zombie : NSObject

@property NSString *name;

@property int age;

@property NSString *characteristics;

    

@end

Zombie *aZombie = [[Zombie alloc] init];

    [aZombie setName:@"Ted"];

    aZombie.age = 12;

    //[aZombie setAge:12];

    [aZombie setCharacteristics:@"likes to eat plants"];

    NSLog(@"The name of the Zombie is %@!", [aZombie name]);

    NSLog(@"%@ is %i years old - as such the hit points are %i", aZombie.name, aZombie.age, [aZombie getHitPoints]);

    NSLog(@"%@", [aZombie characteristics]);