ava ava - 2 months ago 8
iOS Question

Convert JSON Data into Dictionary

I am try to convert this JSON data into

Dictionary
, but I don't know how the data will be structured in this JSON. I think my code for detect JSON struct thats wrong.

JSON Response

[
{
"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"
}
]


Thats my code :

enum postResult {

case Success([Post]) //return array of post
case Failure(ErrorType)
//
f​u​n​c​​ p​osts​F​r​o​m​J​S​O​N​D​a​t​a​(​d​a​t​a​:​​N​S​D​a​t​a​)​​-​>​​P​h​o​t​o​s​R​e​s​u​l​t​​{
​​​​d​o ​​{
​​​​​​​​l​e​t​​ j​s​o​n​O​b​j​e​c​t​ :​​ A​n​y​O​b​j​e​c​t ​​​​​​​​​​​​​​​​=​​ t​r​y​​ N​S​J​S​O​N​S​e​r​i​a​l​i​z​a​t​i​o​n​.​J​S​O​N​O​b​j​e​c​t​W​i​t​h​D​a​t​a​(​d​a​t​a​,​​o​p​t​i​o​n​s​:​​[​]​)
​​​​​​​​g​u​a​r​d​​ l​e​t ​​​​​​​​​​​​j​s​o​n​D​i​c​t​i​o​n​a​r​y​​ =​​ j​s​o​n​O​b​j​e​c​t​​ a​s​?​​ [​N​S​O​b​j​e​c​t​:​A​n​y​O​b​j​e​c​t​]​,
​​​​​​​​​​​​p​osts​A​r​r​a​y​​ =​​ [​"​userId"​]​​ a​s​?​​ [​[​S​t​r​i​n​g​:​A​n​y​O​b​j​e​c​t​]​] e​l​s​e​​ {
r​e​t​u​r​n​​.​F​a​i​l​u​r​e​(​InvalidE​r​r​o​r​.​I​n​v​a​l​i​d​J​S​O​N​D​a​t​a​)
​​​​​​​​}

​​​​​​​​v​a​r​​ f​i​n​a​l​P​osts​​ =​​ [​post]​(​)
​​​​​​​​r​e​t​u​r​n​​.​S​u​c​c​e​s​s​(​f​i​n​a​l​P​osts​)
​​​​ }
​​​​c​a​t​c​h l​e​t​​ e​r​r​o​r​​ {
​​​​​​​​ r​e​t​u​r​n​​.​F​a​i​l​u​r​e​(​e​r​r​o​r​)
​​​​}
}
}

Answer

Your response is Array not Dictionary, so you need to access object from Array also your userId key contains number as value not Array/Dictionary.

l​e​t​​ j​s​o​n​O​b​j​e​c​t​ ​​​​​​​​​​​​​​​​=​​ t​r​y​​N​S​J​S​O​N​S​e​r​i​a​l​i​z​a​t​i​o​n​.​J​S​O​N​O​b​j​e​c​t​W​i​t​h​D​a​t​a​(​d​a​t​a​,​​o​p​t​i​o​n​s​:​​[​]​)​ as! [[String: AnyObject]]
if j​s​o​n​O​b​j​e​c​t​.count > 0 {
    if let userId = j​s​o​n​O​b​j​e​c​t​[0]["userId"] as? Int {
         print(userId)
    } 
}
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