[objective-c] NSDictionary to NSArray?

i have a NSDictionary which looks like:

{
"Item1" = 2.4;
"Item2" = 5.5;
"Item3" = 15.6;
}

To use this NSDictionary Items in a Table View i have to transfer it to a NSArray, am i right?

So i try:

NSDictionary *dict = [myDict objectForKey:@"items"];

for (id item in dict) {
    [_myArray addObject:[dict objectForKey:item]];
}

But _myArray keeps empty? What am i doing wrong?

You can create an array of all the objects inside the dictionary and then use it as a datasource for the TableView.

NSArray *aValuesArray = [yourDict allValues];

NSArray *keys = [dictionary allKeys];
NSArray *values = [dictionary allValues];

This code is actually used to add values to the dictionary and through the data to an Array According to the Key.

NSMutableArray *arr = [[NSMutableArray alloc]init];
NSDictionary *dicto = [[NSMutableDictionary alloc]initWithObjectsAndKeys:@"Hello",@"StackOverFlow",@"Key1",@"StackExchange",@"Key2", nil];
NSLog(@"The dictonary is = %@", dicto);
arr = [dicto valueForKey:@"Key1"];
NSLog(@"The array is = %@", arr);

You just need to initialize your NSMutableArray

NSMutableArray  *myArray = [[NSMutableArray alloc] init];

There are a few things that could be happening here.

Is the dictionary you have listed the myDict? If so, then you don't have an object with a key of @"items", and the dict variable will be nil. You need to iterate through myDict directly.

Another thing to check is if _myArray is a valid instance of an NSMutableArray. If it's nil, the addObject: method will silently fail.

And a final thing to check is that the objects inside your dictionary are properly encased in NSNumbers (or some other non-primitive type).

NSArray * values = [dictionary allValues];

Code Snippet1:

NSMutableArray *array = [[NSMutableArray alloc] init];
NSArray * values = [dictionary allValues];
[array addObject:values];

Code Snippet2: If you want to add further

[array addObject:value1];
[array addObject:value2];
[array addObject:value3];

And so on

Also you can store key values of dictionary to array

NSArray *keys = [dictionary allKeys];

To get all objects in a dictionary, you can also use enumerateKeysAndObjectsUsingBlock: like so:

NSMutableArray *yourArray = [NSMutableArray arrayWithCapacity:6];
[yourDict enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {
    [yourArray addObject:obj];
}];

+ (NSArray *)getArrayListFromDictionary:(NSDictionary *)dictMain paramName:(NSString *)paramName
{
    if([dictMain isKindOfClass:[NSDictionary class]])
    {
        if ([dictMain objectForKey:paramName])
        {
            if ([[dictMain objectForKey:paramName] isKindOfClass:[NSArray class]])
            {
                NSArray *dataArray = [dictMain objectForKey:paramName];

                return dataArray;
            }
        }
    }
    return [[NSArray alloc] init];
}

Hope this helps!

In Swift 4:

let dict = ["Item1":2.4, "Item2": 5.4, "Item3" : 6.5]

let array = Array(dict.values)