Decoding JSON Web Tokens in Swift

Question

trying to decode a JWT payload in Swift and having a really difficult time

static func decodePayload(tokenstr: String) {

    //splitting JWT to extract payl         


        

Answer 1

Swift 4 as below:

if let data = Data(base64Encoded: base64String, options: []),
        let str = String(data: data as Data, encoding: String.Encoding.utf8) {
        print(str) // {"exp":1426822163,"id":"550b07738895600e99000001"}
    }