[Swift] base64
//String -> Data let string = "abcdefg" let decodeData = string.data(using: .utf8)! //Data -> Base64인코딩 String let base64encString = (decodeData.base64EncodedString()) as String // Data -> Base64 encoding Data let base64EncStr = strData.base64EncodeData(options: .lineLength64Characters) // Base64 Encoding Data -> String let string = String(data: base64EncDat, encoding: .utf8)! // Base64 Decoding..