Converting response NSArray to Object array swift3 - arrays

Question

Hi i am able to get response from server for array list. But i dont know how to parse that response in object array [Feed] and send it on on completion handler. My Code is as follows:
class FeedsService {
private var feedsEndPoint: String = "https://jsonplaceholder.typicode.com/posts"
public func getFeeds(completion: ([Feed]) -> Void) {
Alamofire.request(feedsEndPoint, method: .get)
.validate(statusCode: 200..<300)
.validate(contentType: ["application/json"])
.responseJSON{ response in
print("Response \(response.result.value)")
}
}
}
Feed Model is as follows:
class Feed {
private var title: String
private var body: String
init(title:String, body: String) {
self.title = title
self.body = body
}
public func getTitle() -> String {
return self.title
}
public func getBody() -> String {
return self.body;
}
}
I want to parse this as Feed Array and sent it on completion callback.
I am using Alamofire rest library for loading data from rest server.

Answer 1

You can try this:
class FeedsService {
private var feedsEndPoint: String = "https://jsonplaceholder.typicode.com/posts"
public func getFeeds(completion: #escaping ([Feed]) -> Void) {
Alamofire.request(feedsEndPoint, method: .get)
.validate(statusCode: 200..<300)
.validate(contentType: ["application/json"])
.responseJSON{ response in
print("Response \(response.result.value)")
var feeds = [Feed]()
if let jsonArray = response.result.value as? [[String: Any]] {
for json in jsonArray {
if let feed = Feed(json: json) {
feeds.append(feed)
}
}
completion(feeds)
} else {
// handle error
}
}
}
}
Also, update your Feed class:
class Feed {
private var title: String
private var body: String
init(title:String, body: String) {
self.title = title
self.body = body
}
init?(json: [String: Any]) {
guard let title = json["title"] as? String,
let body = json["body"] as? String else {
return nil
}
self.title = title
self.body = body
}
public func getTitle() -> String {
return self.title
}
public func getBody() -> String {
return self.body;
}
}
Just change "title" and "body" to whatever is the appropriate key in your json response.
As El Tomato is pointing out that Feed init is not working, this is a test code that can be tried out in a playground:
let testFeedJson = ["title": "Test Title", "body" : "Test Body"]
if let testFeed = Feed(json: testFeedJson) {
print(testFeed.getTitle())
print(testFeed.getBody())
}