Swift: Looping through a Dictionary Array - arrays

Question

I'm struggling to loop through an array of dictionary values returned from a web service call.
I've implemented the following code and I seem to be encountering a crash on running.
I'd also like to store the results into a custom Struct. Really having difficulty achieving this and the answers on here so far haven't worked. Would be grateful if someone is able to help.
let nudgesURLString = "http://www.whatthefoot.co.uk/NUDGE/nudges.php"
let nudgesURL = NSURL(string: nudgesURLString)
let session = NSURLSession.sharedSession()
let task = session.dataTaskWithURL(nudgesURL!, completionHandler: {data, response, error -> Void in
if error != nil {
println(error)
} else {
let nudgesJSONResult = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.MutableContainers, error: nil) as NSDictionary
let nudges: NSDictionary = nudgesJSONResult["nudges"] as NSDictionary
if let list = nudgesJSONResult["nudges"] as? [[String:String]] {
for nudgeDict in list {
let location = nudgeDict["location"]
println(location)
}
}
}
})
task.resume()
}

Answer 1

NOTICE
This answer was written using Swift 1.2 and as such, there may be some slight stylistic and syntax changes required for the answer to work depending on your current Swift system.
Answer -- Swift 1.2
This line is crashing your code:
let nudges: NSDictionary = nudgesJSONResult["nudges"] as NSDictionary
You're forcing a cast that Swift can't handle. You never make it to your for-loop.
Try changing your code to look more like this:
let nudgesURLString = "http://www.whatthefoot.co.uk/NUDGE/nudges.php"
let nudgesURL = NSURL(string: nudgesURLString)
let session = NSURLSession.sharedSession()
let task = session.dataTaskWithURL(nudgesURL!, completionHandler: {data, response, error -> Void in
if error != nil {
println(error)
} else {
let nudgesJSONResult = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.MutableContainers, error: nil) as [String : AnyObject]
if let nudges = nudgesJSONResult["nudges"] as? [[String : String]] {
for nudge in nudges {
let location = nudge["location"]
println("Got location: \(location)")
println("Got full nudge: \(nudge)")
}
}
}
})
task.resume()

Answer 2

Thanks,
I created the following Struct which stored the data, and also lets me create dictionaries in the view controller for a particular index.
struct NudgesLibrary {
var location: NSArray?
var message: NSArray?
var priority: NSArray?
var date: NSArray?
var nudges: NSArray?
init(nudgesObject: AnyObject) {
nudges = (nudgesObject["nudges"] as NSArray)
if let nudges = nudgesObject["nudges"] as? NSArray {
location = (nudges.valueForKey("location") as NSArray)
message = (nudges.valueForKey("message") as NSArray)
priority = (nudges.valueForKey("priority") as NSArray)
date = (nudges.valueForKey("date") as NSArray)
}
}
}