Create JSON array and JSON Object in swift

Question

I want do this JSON in Swift. But i cant do this....

{
    "room": "Platinum",
    "products": [{
        "name": "Agua",
         "quantity": 2
},
{   
    "name":"Cafe",
    "quantity": 4
}],
    "observation": "",
    "date": "2016-08-15 12:00:00"
}

My swift code returns this:

{
    date = "2016-08-25 18:16:28 +0000";
    observation = "";
    products =     (
            {
                name = cafe;
                quantity = 1;
            }
    );
    room = Platinium;

This is my code:

let para:NSMutableDictionary = NSMutableDictionary()
let prod: NSMutableDictionary = NSMutableDictionary()

para.setValue(String(receivedString), forKey: "room")
para.setValue(observationString, forKey: "observation")
para.setValue(stringDate, forKey: "date")

for product in products{
    prod.setValue(product.name, forKey: "name")
    prod.setValue(product.quantity, forKey: "quantity")
    para.setObject([prod], forKey: "products")
}

This is my input:

{
    name = coffe;
    quantity = 2;
}
{
    name = cappuccino;
    quantity = 1;
}

This is output

{
    date = "2016-08-25 18:52:30 +0000";
    observation = "";
    products =     (
            {
                name = cappuccino;
                quantity = 1;
            }
    );
    room = Platinium;
}

I created a request to send the two products, but the code prints only the last product.

Little confusing, what is your input (data you work with) a what is the output you mention? Consider to mark input/output staff in your question, please — pedrouan
– pedrouan, Commented Aug 25, 2016 at 18:51
You're overwriting the keys in the same dictionary - prod. — Cristik
– Cristik, Commented Aug 25, 2016 at 18:52

Box Box Box Box · Accepted Answer · 2017-04-02 09:35:10Z

10

Create a new prodArray array which holds all the prod dictionary(name and quantity.) Set this prodArray for para array corresponding to products key.

Issue in your code:- In your forin loop, you are over-riding the value corresponding to "products" key.

let para:NSMutableDictionary = NSMutableDictionary()
let prodArray:NSMutableArray = NSMutableArray()

para.setValue(String(receivedString), forKey: "room")
para.setValue(observationString, forKey: "observation")
para.setValue(stringDate, forKey: "date")

for product in products
{
    let prod: NSMutableDictionary = NSMutableDictionary()
    prod.setValue(product.name, forKey: "name")
    prod.setValue(product.quantity, forKey: "quantity")
    prodArray.addObject(prod)
}

para.setObject(prodArray, forKey: "products")

edited Apr 2, 2017 at 9:35

Box Box Box Box

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answered Aug 25, 2016 at 18:55

pkc

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4 Comments

Ideal Bakija Over a year ago

Hi, I am using your code. However; when I send in the server all the prod values are showng as single entities, not group like we are assigning.

pkc Over a year ago

All the values are assigned to a dictionary. This dictionary is holding an array of the dictionaries. Is it clear now?

Ideal Bakija Over a year ago

Is there a way I can store multiple key in one dictionary ? Like for ex: have { name: 'some name' , quanity: '2'} , { ...

Sachin Tanpure Over a year ago

Thanks, I was stuck in similar type of problem. This works like charm

Wain · Accepted Answer · 2016-08-25 18:51:52Z

3

You need to move let prod: NSMutableDictionary = NSMutableDictionary() inside the for loop and move para.setObject([prod], forKey: "products") after the for loop, but you also need to change so you create and add each prod to an array in the loop and then add that array to para after the loop.

Your current code keeps replacing things rather than adding so at the end you only have the last one.

answered Aug 25, 2016 at 18:51

Wain

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