“The data couldn’t be read because it is missing” error when decoding JSON in Swift

Question

I am getting the following error :

The data couldn’t be read because it is missing.

When I run the following code:

struct Indicator: Decodable {
         


        

Answer 1

"The data couldn’t be read because it is missing"

the error coming from this code:

...catch {
    print(error.localizedDescription)
}

Because: seems that a key is missing or mistyped.

You can check which key is missing by coding like this:

...catch {
    debugPrint(error)
}

Note: If struct keys are different from JSON data keys, see below example: the key in struct is 'title' but in data is 'name'.

struct Photo: Codable {
    var title: String
    var size: Size

    enum CodingKeys: String, CodingKey
    {
        case title = "name"
        case size
    }
}

If you mistype 'name', the error will pop up.

Also, if you mistype this 'CodingKeys', you will get the error.

enum CodingKeys:...