Accessing devices data from Facebook graph Api request in swift - ios

Question

I have made a graph request using the FBSDK in my swift application for iphone and I am having some difficulty accessing some of the information it has returned in the result. Specifically I want to get the list of device platforms the user uses. Playing around with the Graph api explorer I get this data for a query on a user's devices.
{
"devices": [
{
"os": "iOS"
}
],
"id": "12345678912345"
}
but in swift the data returned is in this format when I print the graph results value to console:
{
devices = (
{
os = iOS;
}
);
}
so my question is, how do I get the value of 'os' in swift? all my attempts casting the data to NSDictionaries and NSArrays etc have all failed.
let listOfDevices: String = result.valueForKey("devices") as? String
outputs
devices = (
{
os = iOS;
}
);
which just goes to show it doesn't contain any key/pair values for an NSDictionary when I search for ["os"] because of those"()" parenthesis. All help appreciated. Probably something really simple...
I don't want to use string regex.

Answer 1

listOfDevices should be a dictionary.
Swift 2
do {
// Replicating your data for the example
let response = "{\"devices\": [{\"os\": \"iOS\"}],\"id\": \"12345678912345\"}"
// Cast the response as a Dictionary with String as key and AnyObject as value
if let data = response.dataUsingEncoding(NSUTF8StringEncoding),
listOfDevices = try NSJSONSerialization.JSONObjectWithData(data, options: []) as? [String:AnyObject] {
// Value of `devices` is an array of dictionaries
if let devices = listOfDevices["devices"] as? [[String:AnyObject]] {
for device in devices {
if let os = device["os"] as? String {
print(os)
}
}
}
// Value of `id` is a String
if let id = listOfDevices["id"] as? String {
// use `id`
}
}
} catch let error as NSError {
print(error.localizedDescription)
}
Swift 1
// Replicating your data for the example
let response = "{\"devices\": [{\"os\": \"iOS\"}],\"id\": \"12345678912345\"}"
let data = response.dataUsingEncoding(NSUTF8StringEncoding)
// Cast the response as a Dictionary with String as key and AnyObject as value
let listOfDevices = NSJSONSerialization.JSONObjectWithData(data!, options: NSJSONReadingOptions.MutableContainers, error: nil) as! [String:AnyObject]
// Value of `devices` is an array of dictionaries
if let devices = listOfDevices["devices"] as? [[String:AnyObject]] {
for device in devices {
if let os = device["os"] as? String {
println(os)
}
}
}
// Value of `id` is a String
if let id = listOfDevices["id"] as? String {
// use `id`
}