json - Swift JSON 解析，在 url 中使用过滤器

Question

我正在尝试解析 JSON，一切正常，但是当我尝试使用 url 提供过滤器时，它说在解包可选值时发现 nil 。我想知道是否应该以其他方式提供过滤器。 PS..当我在浏览器中使用它时，该网址工作正常

这是带过滤器的 url 的样子:

https://start.jamespro.nl/v4/api/json/tasks/?filter=[{"column":"Date","operator":"=","value":"2017-08-04"}, {"column":"UserId","operator":"=","value":"2"}]

这是我的整个代码:

func apiRequestTasks(url: String) {
        apiRequestHeader(userName: "*******", passWord: "******")
        var running = false
        let urlProjects = NSURL(string: url)
        let task = session?.dataTask(with: urlProjects! as URL) {
            ( data, response, error) in
            if let taskHeader = response as? HTTPURLResponse {
                print(taskHeader.statusCode)
            }
            if error != nil {
                print("There is an error!!!")
                print(error ?? "")
            } else {
                if let content = data {
                    do {
                        let dictionary = try JSONSerialization.jsonObject(with: content) as! [String:Any]
                        print(dictionary)

                    }
                    catch {
                        print("Error: Could not get any data")
                    }
                }
            }
            running = false
        }


        running = true
        task?.resume()

        while running {
            print("waiting...")
            sleep(1)
        }

    }

Answer 1

我认为问题在于您创建 URL 的方式，请尝试如下操作:

let filters = "[\"column\":\"Date\",\"operator\":\"=\",\"value\":\"2017-08-04\"}, {\"column\":\"UserId\",\"operator\":\"=\",\"value\":\"2\"}]"


if var url = URLComponents(string: "https://start.jamespro.nl/v4/api/json/tasks") {
    url.query = "filter=:\(filters)"
    print ("url", url.string ? "invalid url")
}