Is there a way to pretty print Swift dictionaries to the console?

Question

NSDictionary *dictionary = @{@\"A\" : @\"alfa\",
                             @\"B\" : @\"bravo\",
                             @\"C\" : @\"charlie\",
                       


        

Answer 1

For debug purpose only I would convert the Array or Dictionary to a pretty printed json:

public extension Collection {

    /// Convert self to JSON String.
    /// Returns: the pretty printed JSON string or an empty string if any error occur.
    func json() -> String {
        do {
            let jsonData = try JSONSerialization.data(withJSONObject: self, options: [.prettyPrinted])
            return String(data: jsonData, encoding: .utf8) ?? "{}"
        } catch {
            print("json serialization error: \(error)")
            return "{}"
        }
    }
}

Then:

print("\nHTTP request: \(URL)\nParams: \(params.json())\n")

Result on console:

HTTP request: https://example.com/get-data
Params: {
  "lon" : 10.8663676,
  "radius" : 111131.8046875,
  "lat" : 23.8063882,
  "index_start" : 0,
  "uid" : 1
}