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

Question

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


        

Answer 1

Details

• Xcode 10.2.1 (10E1001), Swift 5

Solution

extension Dictionary {
    func format(options: JSONSerialization.WritingOptions) -> Any? {
        do {
            let jsonData = try JSONSerialization.data(withJSONObject: self, options: options)
            return try JSONSerialization.jsonObject(with: jsonData, options: [.allowFragments])
        } catch {
            print(error.localizedDescription)
            return nil
        }
    }
}

Usage

let dictionary: [String : Any] = [
                                    "id": 0,
                                    "bool": true,
                                    "int_array": [1,3,5],
                                    "dict_array": [
                                        ["id": 1, "text": "text1"],
                                        ["id": 1, "text": "text2"]
                                    ]
                                 ]
print("Regualr print:\n\(dictionary)\n")
guard let formatedDictionary = dictionary.format(options: [.prettyPrinted, .sortedKeys]) else { return }
print("Pretty printed:\n\(formatedDictionary)\n")

Results