Question

I don’t understand why it can’t add element to my dictionary. In my console, i always get the “It’s not here!” I have posted my code below

//.m  
#import "ExercisesViewController.h"
#import "STATableViewController.h"

@implementation ExercisesViewController
@synthesize descriptionLabel = _descriptionLabel;
@synthesize descriptionsDictionary = _descriptionsDictionary;
@synthesize objName = _objName;

- (void)viewDidLoad
{    
[super viewDidLoad];
_descriptionsDictionary = [[NSMutableDictionary alloc]init];
[_descriptionsDictionary setObject:@"foo" forKey:@"bar"];

if([[_descriptionsDictionary allKeys] containsObject:@"foo"])
    NSLog(@"It's here!");
else
    NSLog(@"It's not here!");
}

Answer 1

You are adding the value foo for the key bar but then checking the keys for foo. Reverse the key/value you are adding:

[_descriptionsDictionary setObject:@"bar" forKey:@"foo"];