Question 1

How to parse JSON with SwiftyJSON in Swift?

Accepted Answer

Initialize a JSON object from Data, a JSON object, or a string, then use subscripts to access values. For example, let json = try? JSON(data: dataFromNetworking) and let name = json["user"]["name"].string extracts a nested string safely.

Question 2

SwiftyJSON vs Codable: which is better for JSON parsing?

Accepted Answer

SwiftyJSON is better for dynamic or unstructured JSON where keys are unknown, thanks to its flexible API. Codable is preferable for static JSON with predefined models, as it automatically maps JSON to Swift types with less code.

Question 3

How to handle nested JSON with SwiftyJSON?

Accepted Answer

Use path-based subscripts, like json[1]["list"][2]["name"].string or an array of keys. This allows intuitive access to deeply nested elements without multiple optional unwraps.

Question 4

Can SwiftyJSON work with Alamofire?

Accepted Answer

Yes, SwiftyJSON integrates smoothly with Alamofire. You can parse response JSON directly, as shown in the README where Alamofire.request returns data converted to a SwiftyJSON object for easy manipulation.

Question 5

What error types does SwiftyJSON provide?

Accepted Answer

SwiftyJSON 4.x defines a SwiftyJSONError enum with cases like indexOutOfBounds, notExist, and wrongType. These errors are accessible via the .error property on JSON objects, helping identify parsing issues.

Question 6

How to merge JSON objects in SwiftyJSON?

Accepted Answer

Use the merge(with:) or merged(with:) methods. For example, original.merge(with: update) combines JSON objects, appending arrays and merging dictionaries recursively, as demonstrated in the README with user data.

SwiftyJSON

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