通过可编码协议解析JSON

Question

I have an answer with Firebase in this form:

    ["allNews": <__NSArrayM 0x6000015f06c0>(
{
    createDate = "21.02.19";
    creator = "lol@gmail.com";
    creatorImageURL = "<null>";
    creatorUID = kzorlyIOI3RgEjCV1XDLQUhu5CS2;
    newsImageURL = "";
    text = "Daft g s dfg ";
    title = "Test ";
},
{
    createDate = "21.02.19";
    creator = "plol2@gmail.com";
    creatorImageURL = "<null>";
    creatorUID = Tw1JzFzcVbelRUA7GoFZ9CIWIwr1;
    newsImageURL = "";
    text = Vcbccvbvb;
    title = hdbdvbccfb;
}
)
]

How can I parse it via the Codable protocol?

Below is my code:

struct AllNews: Codable {
    var allNews: [DetailNews]
}

struct DetailNews: Codable {
    var creator: String
    var creatorUID: String
    var title: String
    var text: String
    var createDate: String
    var creatorImageURL: String
    var newsImageURL: String
}

that's how I parse the data

guard let newsData = try? JSONSerialization.data(withJSONObject: document.data(), options: []) else { return }
let decodeJSON = JSONDecoder()

let allNews = try? decodeJSON.decode([DetailNews].self, from: newsData)
print(allNews)

but all the same allNews comes nil although the news data comes to me in the form of json which is attached above

Answer 1

You are receiving response in format:

[ "allNews": (
    {
        key : value
    },
    {
        key : value
    }
)]

As your news array lies in allNews key so you should pass AllNews struct to decode your response as:

guard let newsData = try? JSONSerialization.data(withJSONObject: document.data(), options: []) else { return }
let allNews = try? JSONDecoder().decode(AllNews.self, from: newsData)
print(allNews)

Answer 2

This should help you parse your data

let value = response.data

do {
    let allValues = try JSONDecoder().decode([DetailNews].self, from: value)
} catch let error {
     print(error)
}

Make sure value is of type Data