Base64 for Swift

base64.swift

let plainString = "foo"

// Encoding

guard let plainData = (plainString as NSString).dataUsingEncoding(NSUTF8StringEncoding) else {
    fatalError()
}

let base64String = plainData.base64EncodedStringWithOptions(NSDataBase64EncodingOptions(rawValue: 0))
print(base64String) // Zm9v

// Decoding

if let decodedData = NSData(base64EncodedString: base64String, options: NSDataBase64DecodingOptions(rawValue: 0)),
    let decodedString = NSString(data: decodedData, encoding: NSUTF8StringEncoding) {
        print(decodedString) // foo
}

Thank you. I'm new to swift and struggle with it's string functions.

Thanks-- swift3 update :

let plainString = "foo"
guard let plainData = (plainString as NSString).data(using: String.Encoding.utf8.rawValue) else {
    fatalError()
}

let base64String = (plainData as NSData).base64EncodedString(NSData.Base64EncodingOptions(rawValue: 0))
print(base64String) // Zm9v

@sstadelman Can you please provide whole function to convert Base64 to Image & vice versa in Swift 3?

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