Swift error in converting nsdata to NSDictionary - ios

Question

I'm trying to get JSON Array from a web service and I keep getting an error, and I spent much time on this but I can't figure it out.
http://ashishkakkad.com/2014/10/update-json-array-parsing-in-swift-langauage-ios-8-xcode-6-gm/
my Code
if let url=NSURL(string:"http://www.example.com/service/service.php?get=6"){
print(url)
if let allContactsData=NSData(contentsOfURL:url){
if let string1 = NSString(data: allContactsData, encoding: NSUTF8StringEncoding){
print(string1)
}
do{
if let allContacts: AnyObject = try NSJSONSerialization.JSONObjectWithData(allContactsData, options:NSJSONReadingOptions.MutableContainers) as! NSDictionary{
if let json = allContacts as? Array<NSObject> {
print(json)
for index in 0...json.count-1 {
let contact : NSObject? = json[index]
print(contact)
let collection = contact! as! Dictionary<String, AnyObject>
print(collection)
print(collection["title"])
let name : AnyObject? = collection["title"]
let cont : AnyObject? = collection["link"]
self.names.append(name as! String)
self.contacts.append(cont as! String)
}
}
print(self.names)
print(self.contacts)
}
} catch {
print("Dim background error")
}
}
the error I get on this line
if let allContacts: AnyObject = try
NSJSONSerialization.JSONObjectWithData(allContactsData,
options:NSJSONReadingOptions.MutableContainers) as! NSDictionary

Answer 1

You should be casting to [[String: AnyObject]] rather than NSDictionary. However, I admit that I'm not familiar with the approach you're attempting to use, I would do something more like this:
enum HTTPStatusCodes : Int {
case Ok = 200
case Created = 201
case BadRequest = 404
}
let request = NSMutableURLRequest(URL: NSURL(string: "http://www.example.com/service/service.php?get=6")!)
let session = NSURLSession.sharedSession()
request.HTTPMethod = "GET"
request.addValue("application/json", forHTTPHeaderField: "Accept")
let task = session.dataTaskWithRequest(request) { (data: NSData?, response: NSURLResponse?, error: NSError?) -> Void in
guard let testResponse = response as? NSHTTPURLResponse else {
print("bad \(response)")
return
}
guard let status = HTTPStatusCodes(rawValue: testResponse.statusCode) else {
print("derpped gain")
return
}
print(status)
switch status {
case .Created:
print("ehem")
case .BadRequest:
print("bad request")
case .Ok:
print("ok")
let headerFields = testResponse.allHeaderFields
guard let returnedData = data else {
print("no data was returned")
break
}
do {
// convert data to string
let jsonObject = try NSJSONSerialization.JSONObjectWithData(returnedData, options: .MutableLeaves) as! [[String:AnyObject]]
//print(jsonDict)
} catch let error {
print(error)
}
// update user interface
dispatch_sync(dispatch_get_main_queue()) {
print("update interface")
}
}
}
task.resume()