Type [SubscriptType] does not conform to protocol StringLiteralConvertible error - swift

Question

Type [SubscriptType] does not conform to protocol StringLiteralConvertible
// JsonRequest.swift
class JsonRequest {
var title: String?
var postBody: String?
var coverImage: String?
init(json: NSDictionary){
self.title = json["title"] as? String
self.postBody = json["body"] as? String
self.coverImage = json["img_url"] as? String
}
}
// ViewController.swift file
var posts = [JsonRequest]()
let feedUrl = NSURL(string: "http://example.com/json")
// 2
if let JSONData = NSData(contentsOfURL: feedUrl!) {
// 3
var jsonResult = NSJSONSerialization.JSONObjectWithData(JSONData, options: NSJSONReadingOptions.MutableContainers, error: nil) as NSDictionary
var myJSON = JSON(jsonResult)
let arrayLength = myJSON["dump"].array?.count
if arrayLength != 0 {
for postIndex in 0...arrayLength! - 1 {
var postArray = myJSON["dump"][postIndex]["title"] as? [NSDictionary]
for item in postArray {
posts.append(JsonRequest(json: item))
}
}
}
}
I want to append from my JSON["dump"][0, 1, 2]["title"] to postArray array, save all this titles in the this array, but here is the this error. How can I fix it and save my titles in this Array?

Answer 1

You can not cast postArray as [NSDictionary] because it is not NSDictionary.
But It is string and here is example code for you.
var posts = [String]()
let feedUrl = NSURL(string: "http://example.com/en/feed")
// 2
if let JSONData = NSData(contentsOfURL: feedUrl!) {
// 3
var jsonResult = NSJSONSerialization.JSONObjectWithData(JSONData, options: NSJSONReadingOptions.MutableContainers, error: nil) as NSDictionary
var myJSON = JSON(data:JSONData)
let arrayLength = myJSON["dump"].array?.count
if arrayLength != 0 {
for postIndex in 0...arrayLength! - 1 {
var post = myJSON["dump"][postIndex]["title"].stringValue
posts.append(post)
println(posts)
}
}
}
EDIT
Update your code this way:
JsonRequest.swift
class JsonRequest {
var title: String?
var postBody: String?
var coverImage: String?
init(json: JSON){
self.title = json["title"].stringValue
self.postBody = json["body"].stringValue
self.coverImage = json["img_url"].stringValue
}
}
ViewController.swift
var posts = [JsonRequest]()
let feedUrl = NSURL(string: "http://example.com/en/feed")
// 2
if let JSONData = NSData(contentsOfURL: feedUrl!) {
// 3
var jsonResult = NSJSONSerialization.JSONObjectWithData(JSONData, options: NSJSONReadingOptions.MutableContainers, error: nil) as NSDictionary
var myJSON = JSON(data:JSONData)
let arrayLength = myJSON["dump"].array?.count
var dict = myJSON["dump"]
if arrayLength != 0 {
for postIndex in 0...arrayLength! - 1 {
var tempDict = dict[postIndex]
posts.append(JsonRequest(json: tempDict))
}
}
}
Hope it helps.