How to store NSDictionary value to an NSArray?

Question

In a dictionary I have Key & values like below. How can I get "title" values from the below and store it in a NSArray *data?

{
    changed = 1414164684;
    city = Stockholm;
    class = "3. Mycket god klass";
    coordinates = "POINT(59.3246206 18.0686084)";
    id = 37510;
    title = "19 Glas Bar & Matsal";
    total = 70;`enter code here`
},
{
    changed = 1413991969;
    city = "G\U00f6teborg";
    class = "2. M\U00e4starklass";
    coordinates = "POINT(57.697944330446234 11.974067687988281)";
    id = 34865;
    title = "28+";
    total = 77;
},

Solution 1

The above mentioned snippet is an array, lets name it "result_Array". In "result_Array" you are showing two objects. And each object is further a dictionary. And from each Dictionary you want to fetch title and save it in your array named "data". Here we go

NSMutableArray *data=[NSMutableArray new];

for(int i=0; i<result_Array.count ; i++)
{
    NSDictionary *dict = [result_Array objectAtIndex:i];
    [data addObject:[dict objectForKey:@"title"]];
}

Hope it helps. Feel free to ask any query

Solution 2

If you have an array of NSDictionary, then you can get all values of a key using method "valueForKey" without any iteration:

NSArray *list = @[

@{@"changed":@"1414164684",
@"title":@"19 Glas Bar & Matsal"},

@{@"changed":@"1413991969",
@"title":@"28+"}];

NSArray *titles = [list valueForKey:"title"];

In the array titles you get only titles from list.

Solution 3

The example code you provided is actually an Array of Dictionaries. So to answer your question with that small change

NSArray *originalDict;
NSMutableArray *data = [NSMutableArray new];
for (NSUInteger i = 0; i < originalDict.count; i++) {
    NSDictionary *currentDictionaryPointer = [originalDict objectAtIndex:i];
    NSString *title = [currentDictionaryPointer objectForKey:@"title"];
    [data addObject:title];
 }

Where originalDict is the object that points to your provided sample code.

Comments

[Shaheen Ghiassy]

The method addObject only works on a NSMutableArray. This won't work in your example because you are using the immutable NSArray

[Stephen Jebakumar]

Thank u! Really appreciate ur help!

[ZeMoon]

Yeah I corrected that as soon as I published the answer

[Jasmeet]

@StephenJebakumar , Thank you stephen, If my suggested answer works, Dont forget to mark this as answer ;) keep coding

[Badal Shah]

what is result_Array ?

[Jasmeet]

@BadalShah The Question code snippet has Array. Am referring to that array as result_Array