How to convert a base64String to String in Swift?

Question

I am receiving a base64String from webservice response in NSData, how to convert that base64String to String in swift?

    //Code
    var jsonResult = NSJSON         


        

Answer 1

The above answers are core, but i had an error like

fatal error, found nil while unwrapping an optional value

The solution is adding options

extension String {
//: ### Base64 encoding a string
    func base64Encoded() -> String? {
        if let data = self.data(using: .utf8) {
            return data.base64EncodedString()
        }
        return nil
    }

//: ### Base64 decoding a string
    func base64Decoded() -> String? {
        if let data = Data(base64Encoded: self, options: .ignoreUnknownCharacters) {
            return String(data: data, encoding: .utf8)
        }
        return nil
    }
}

and use it safely

var str = "HelloWorld"
if let base64Str = str.base64Encoded() {
    print("Base64 encoded string: \"\(base64Str)\"")
    if let trs = base64Str.base64Decoded() {
        print("Base64 decoded string: \"\(trs)\"")
    }
}