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

i've made an update to Ashok Kumar S answer to add filler character when string size is not divisible by 4, raising an exception and returning nil

extension String {
func base64Encoded() -> String? {
    return data(using: .utf8)?.base64EncodedString()
}

func base64Decoded() -> String? {
    var st = self;
    if (self.count % 4 <= 2){
        st += String(repeating: "=", count: (self.count % 4))
    }
    guard let data = Data(base64Encoded: st) else { return nil }
    return String(data: data, encoding: .utf8)
}