Elegant way to view JSONEncode() output in swift

The encode() method returns Data containing the JSON representation in UTF-8 encoding. So you can just convert it back to a string:

var test = [String : String] ()test["title"] = "title"test["description"] = "description"let encoder = JSONEncoder()if let json = try? encoder.encode(test) {    print(String(data: json, encoding: .utf8)!)}

Output:

{"title":"title","description":"description"}

With Swift 4, String has a initializer called init(data:encoding:). init(data:encoding:) has the following declaration:

init?(data: Data, encoding: String.Encoding)

Returns a String initialized by converting given data into Unicode characters using a given encoding.

The following Playground snippets show how to use String init(data:encoding:) initializer in order to print a JSON data content:

import Foundationvar test = [String : String]()test["title"] = "title"test["description"] = "description"let encoder = JSONEncoder()if let data = try? encoder.encode(test),    let jsonString = String(data: data, encoding: .utf8) {    print(jsonString)}/* prints: {"title":"title","description":"description"} */

Alternative using JSONEncoder.OutputFormatting set to prettyPrinted:

import Foundationvar test = [String : String]()test["title"] = "title"test["description"] = "description"let encoder = JSONEncoder()encoder.outputFormatting = .prettyPrintedif let data = try? encoder.encode(test),    let jsonString = String(data: data, encoding: .utf8) {    print(jsonString)}/* prints: {   "title" : "title",   "description" : "description" } */