Decode a string in Swift

Question

How can I decode a string in swift? The string is now test%2Enl , but the correct format is test.nl .

I now have this:

 let encodedData = encodedString.dataUsingEncoding(NSUTF16StringEncoding)!
 let attributedOptions = [NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType]
 let attributedString = NSAttributedString(data: encodedData, options: attributedOptions, documentAttributes: nil, error: nil)!

 return attributedString.string     

Answer 1

You can use stringByReplacingPercentEscapesUsingEncoding

var properString = s.stringByReplacingPercentEscapesUsingEncoding(NSUTF8StringEncoding)!

Update for swift 3: Use removingPercentEncoding instead.

Answer 2

In Swift 3:

let encodedString = "test%2Enl"
let decodedString = encodedString.removingPercentEncoding!

Swift 3 removed a lot of "excess" wording in many of the Apple APIs.

In this case stringByRemovingPercentEncoding was simplified to removingPercentEncoding.

Answer 3

Or you can use stringByRemovingPercentEncoding ?

From the docs:

Returns a new string made from the receiver by replacing all percent encoded sequences with the matching UTF-8 characters.

let encodedString = "test%2Enl"
let decodedString = encodedString.stringByRemovingPercentEncoding!
println(decodedString)

This would print test.nl

Answer 4

You could use SwiftString ( https://github.com/amayne/SwiftString ) to do this.

"test%2Enl".decodeHTML() // "test.nl"

DISCLAIMER: I wrote this extension