Question

我尝试将此JSON数据转换为Dictionary，但我不知道如何在此JSON中构建数据。我认为我的代码检测JSON结构是错误的。

JSON响应

[
    {
        "userId": 1,
        "id": 1,
        "title": "sunt aut facere repellat provident occaecati excepturi optio reprehenderit",
        "body": "quia et suscipit\nsuscipit recusandae consequuntur expedita et cum\nreprehenderit molestiae ut ut quas totam\nnostrum rerum est autem sunt rem eveniet architecto"
    },
    {
        "userId": 2,
        "id": 2,
        "title": "et ea vero quia laudantium autem",
        "body": "delectus reiciendis molestiae occaecati non minima eveniet qui voluptatibus\naccusamus in eum beatae sit\nvel qui neque voluptates ut commodi qui incidunt\nut animi commodi"
    }
]

这是我的代码：

enum postResult {

    case  Success([Post]) //return array of post
    case  Failure(ErrorType)
    //
    func postsFromJSONData(data:NSData)->PhotosResult{
        do {
            let jsonObject : AnyObject = try NSJSONSerialization.JSONObjectWithData(data,options:[])
            guard let jsonDictionary = jsonObject as? [NSObject:AnyObject],
            postsArray = ["userId"] as? [[String:AnyObject]] else {
                return.Failure(InvalidError.InvalidJSONData)
            }

            var finalPosts = [post]()
            return.Success(finalPosts)
        }
        catch let error {
            return.Failure(error)
        }
    }
}

Answer 1

您的回复是数组而非字典，因此您需要从数组访问对象，而您的userId键包含的数字不是Array/Dictionary。

let jsonObject = tryNSJSONSerialization.JSONObjectWithData(data,options:[]) as! [[String: AnyObject]]
if jsonObject.count > 0 {
    if let userId = jsonObject[0]["userId"] as? Int {
         print(userId)
    } 
}

将JSON数据转换为字典

1 个答案: