swift -> base64Encode,base64Decode

 

extension String {
    func base64Encoding()->String {
        let plainData = self.data(using: String.Encoding.utf8)
        let base64String = plainData?.base64EncodedString(options: NSData.Base64EncodingOptions.init(rawValue: 0))
        return base64String!
    }
    func base64Decoding()->String
    {
        let decodedData = NSData(base64Encoded: self, options: NSData.Base64DecodingOptions.init(rawValue: 0))
        let decodedString = NSString(data: decodedData! as Data, encoding: String.Encoding.utf8.rawValue)! as String
        return decodedString
    }
 
}