How do I access variables that are inside closures in Swift?

Question

I\'m new to Swift and I\'m trying to get the result from this function. I don\'t know how to access variables that are inside the closure that is passed to the sendAsynchron

Answer 1

You are calling an asynchronous function and printing act without waiting for it to finish. In other words, when print(dict) is called, the function hasn't complete execution(hencedict is nil)

Try something like

var dict: NSDictionary!
NSURLConnection.sendAsynchronousRequest(request, queue: NSOperationQueue.mainQueue(), completionHandler: {(response, data, error) in
    var jsonError: NSError?
    let json = NSJSONSerialization.JSONObjectWithData(data!, options: NSJSONReadingOptions.MutableContainers, error: &jsonError) as? NSDictionary
    dict = json
    doSomethingWithJSON(dict)
})

and put your JSON logic inside a doSomethingWithJSON function:

void doSomethingWithJSON(dict: NSDictionary) {
    // Logic here
}

This ensures that your logic is execute only after the URL request completes.