jen2

//Dinner.h
#import <Foundation/Foundation.h>

@interface Dinner: NSObject

  @property (nonatomic, strong) NSString *appetizer;
  @property (nonatomic, strong) NSString *mainDish;
  @property (nonatomic, strong) NSString *dessert;
  @property (nonatomic, strong) NSArray *ingredientsForAppetizer;
  @property (nonatomic, strong) NSArray *ingredientsForMainDish;

jen2

// Dinner.m
#import "Dinner.h"

@implementation Dinner
  - (void)prepareAppetizer
  {
      //Do something to prepare the appetizer.
  }
  - (void)cookMainDish {
      //Do something to cook the main dish.

jen2

// Dinner+CleanUp.h
#import "Dinner.h"
@interface Dinner (CleanUp)
  - (void)bringDishesToSink;
  - (NSUInteger)countTotalDishes;
  - (void)putDishesInDishwasher;
  - (void)removeDishesFromDishwasher;
@end

  

jen2

//ViewController.m

#import "ViewController.h"

@interface ViewController ()
    @property (weak, nonatomic) IBOutlet UIButton *NYC;
    @property (weak, nonatomic) IBOutlet UIButton *paris;
    @property (weak, nonatomic) IBOutlet UIButton *moscow;
    @property (weak, nonatomic) IBOutlet UIButton *hongKong;
    @property (weak, nonatomic) IBOutlet UIButton *honolulu;

jen2

@implementation ViewController
   - (void)viewDidLoad {
        [super viewDidLoad];
   }

   - (IBAction)cityButtonTapped:(UIButton *)sender { //Gets which button is tapped
         switch (sender.tag) {
            case 100:
               self.timeZone = @"EST";
               self.selectedButton = self.nyc;

jen2

    -(void)setTappedCityTimer { 
        [self.timer invalidate];
        self.timer = nil;

        [self setDateTimeLabelsWithTimeZone];
        self.timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(setDateTimeLabelsWithTimeZone) userInfo:nil repeats:YES];
    }

jen2

-(NSArray *)formatCurrentDateTimeForTimeZone { //Gets current date each time it's fired.
         NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
         NSDateFormatter *timeFormatter = [[NSDateFormatter alloc] init];
         NSLocale *posix = [[NSLocale alloc] initWithLocaleIdentifier:@"en_US_POSIX"];
         NSTimeZone *localTimeZone = [NSTimeZone timeZoneWithAbbreviation:self.timeZone];
         [dateFormatter setLocale:posix];
         [dateFormatter setDateFormat:@"EEEE MMMM dd y"];
         [dateFormatter setTimeZone:localTimeZone];
         [timeFormatter setLocale:posix];
         [timeFormatter setDateFormat:@"h:mm:ss a"];

jen2

@interface ViewController ()

@property (nonatomic, weak) IBOutlet UIButton *nyc;
@property (nonatomic, weak) IBOutlet UIButton *paris;
@property (nonatomic, weak) IBOutlet UIButton *moscow;
@property (nonatomic, weak) IBOutlet UIButton *hongKong;
@property (nonatomic, weak) IBOutlet UIButton *honolulu;
@property (nonatomic, weak) IBOutlet UIButton *seattle;
@property (nonatomic, weak) IBOutlet UILabel *timeLabel;
@property (nonatomic, weak) IBOutlet UILabel *dateLabel;

jen2

-(void)unhighlightDeselected { 
  NSArray *cities = [@[self.nyc, self.paris, self.moscow,  self.hongKong, self.honolulu, self.seattle]mutableCopy];
  NSMutableArray *unselectedCities = [NSMutableArray array];
     
  for (UIButton *city in cities) {
      if (city != self.selectedButton) {
      [unselectedCities addObject:city];
      }
  }
  [unselectedCities setValue:[UIColor blueColor] forKey:@"tintColor"];

jen2

#import "ViewController.h"

@interface ViewController ()

@property (nonatomic, weak) IBOutlet UIButton *nyc;
@property (nonatomic, weak) IBOutlet UIButton *paris;
@property (nonatomic, weak) IBOutlet UIButton *moscow;
@property (nonatomic, weak) IBOutlet UIButton *hongKong;
@property (nonatomic, weak) IBOutlet UIButton *honolulu;
@property (nonatomic, weak) IBOutlet UIButton *seattle;