nsurlcomponents

问题 When using URLComponents 's queryItems I've found that if you have a query item whose value contains some percent encoded characters, in my case a / being encoded as %2F , then if you construct a URLComponents object from a String URL that contains such a query item, then mutate the list of query items for the URLComponents object, then if you try to get a URL by calling .url on the URLComponents object, then the query items lose their percent encoding. Here's the code I've been testing this

问题 I'm trying to use URLComponents to compose a URL as that appears to be what it's for. However, when I then access the url property of the components it is nil. Example... var urlComponents = URLComponents(string: "http://google.com")! urlComponents.path = "auth/login" Then I do ... print(urlComponents) Output... scheme: http host: google.com path: auth/login - scheme : "http" - host : "google.com" - path : "auth/login" But then... print(urlComponents.url) outputs nil . Am I doing something