how to parse string array with SwiftyJSON?

Question

Using SwiftyJSON how would I parse the following JSON array into a Swift [String]?

{
    "array": ["one", "two", "three"]
}

I have tried this code, but it doesn't work for me:

for (index: String, obj: JSON) in json["array"] {
        println(obj.stringValue)
    }

What would be the best way to handle this? Thank you.

Answer 1

{
    "myArray": ["one", "two", "three"]
}

Using SwiftyJSON, you can get an array of JSON objects with:

var jsonArr:[JSON] = JSON["myArray"].arrayValue

Functional programming then makes it easy for you to convert to a [String] using the 'map' function. SwiftyJson let's you cast string type with subscript '.string'

var stringArr:[String] = JSON["myArray"].arrayValue.map { $0.stringValue}

Answer 2

SwiftyJSON lets you extract a String? using $0.string or a non optional String using stringValue with a default empty String value if the type doesn't match.

If you want to be sure to have an array of String with non false positives, use :

var stringArray = self.json["array"].array?.flatMap({ $0.string })

or in Swift 4.1

var stringArray = self.json["array"].array?.compactMap({ $0.string })

You can also replace self.json["array"].array by self.json["array"].arrayValue to have a [String] result instead of [String]?.