Json Tableview Swift - ios

Question

this post follows an old post where some people helped me for a similar problem.
I currently developing an app which list user object by making an request to a webservice, which send a response in JSON in this format :
{
"objects": [
{
"id": "28",
"title": "test",
"price": "56 €",
"description": "kiki",
"addedDate": "11-07-2015",
"user_id": "1",
"user_name": "CANOVAS",
"user_zipCode": "69330",
"category_id": "1",
"category_label": "VEHICULES",
"subcategory_id": "1",
"subcategory_label": "Voitures",
"picture": "",
"bdd": {},
"picture_url": "http://jdl-barreme-orange.dyndns.org/WEBSERVICE/pictures/test.JPG"
},
{
"id": "27",
"title": "ferrari",
"price": "55 €",
"description": "rouge jantes",
"addedDate": "11-07-2015",
"user_id": "1",
"user_name": "CANOVAS",
"user_zipCode": "69330",
"category_id": "1",
"category_label": "VEHICULES",
"subcategory_id": "1",
"subcategory_label": "Voitures",
"picture": "",
"bdd": {},
"picture_url": "http://jdl-barreme-orange.dyndns.org/WEBSERVICE/pictures/ferrari.JPG"
}
}
I search a method to retrieve for each dictionary the value title and price and put them in a tableView.
Code I used (tableviewcontroller) :
if let jsonArray = NSJSONSerialization.JSONObjectWithData(urlData!, options: nil, error: nil) as? [[String:AnyObject]] {
for dict in jsonArray {
if let title = dict["title"] as? String {
println(title)
}
}
}
But it doesn't work, I put a breakpoint, and Xcode stop to interpret here :
for dict in jsonArray
Thanks for your help.

Answer 1

This example JSON is not valid: it lacks a ] before the last }.
But I guess this is just a pasting typo and the JSON you're using is properly formatted, so your problem is that you need to first access the objects key of your dictionary.
This key holds a value of an array of dictionaries, so we're using it as a typecast:
if let json = NSJSONSerialization.JSONObjectWithData(urlData!, options: nil, error: nil) as? [String:AnyObject] {
if let objects = json["objects"] as? [[String:AnyObject]] {
for dict in objects {
if let title = dict["title"] as? String {
println(title)
}
}
}
}
First we cast the result of NSJSONSerialization.JSONObjectWithData as the dictionary: [String:AnyObject], then we access the value for the objects key, then we cast this value as an array of dictionaries: [[String:AnyObject]].
Remember, with JSON format, dictionaries are formatted with {} and arrays are formatted with [].
Your example is {key:[{},{}]} so it's a dictionary holding an array of dictionaries.
Update for Swift 2.0
if let json = try? NSJSONSerialization.JSONObjectWithData(urlData!, options: []) as? [String:AnyObject] {
if let objects = json?["objects"] as? [[String:AnyObject]] {
for dict in objects {
if let title = dict["title"] as? String {
print(title)
}
}
}
}

Answer 2

Try this :
var jsonResult: NSDictionary = NSJSONSerialization.JSONObjectWithData(urlData, options: NSJSONReadingOptions.MutableContainers, error: nil) as! NSDictionary
var DataFromJSon = jsonResult["objects"] as! NSArray
for one in DataFromJSon {
var title = one["title"] as! String
println(title)
}