Extract query parameters from NSURL

NSURL+params.swift

extension NSURL {
    func queryParams() -> Dictionary<String, String> {
        var params = Dictionary<String, String>()
        if let queryParams = self.query?.componentsSeparatedByString("&") {
            for param in queryParams {
                var parts = param.componentsSeparatedByString("=")
                params[parts[0]] = parts[1]
            }
        }
        return params
    }
}