Swift NSURL extension that returns a Dictionary of String keys and String values for each key/value pair in an NSURL query string.

SwiftQueryItemsDictionaryNSURLExtension.swift

import Foundation

/**
 Returns a `Dictionary` of `String` keys and `String` values for each key/value pair in an `NSURL` query string.
 - author: Scott Gardner
 - seealso:
 * [Source on GitHub](http://bit.ly/SwiftQueryItemsDictionaryNSURLExtension)
 */
extension NSURL {
  
  var queryItemsDictionary: [String: String] {
    var queryItemsDictionary = [String: String]()
    guard let components = NSURLComponents(URL: self, resolvingAgainstBaseURL: false), queryItems = components.queryItems else { return queryItemsDictionary }
    queryItems.forEach { queryItemsDictionary[$0.name] = $0.value }
    return queryItemsDictionary
  }
  
}