Using threads to update UI with Swift

Question

I\'m developing a software with Xcode 6 using Swift. When I press a button, my code takes some informations from the web and writes them on my NSWindow.

So imagine some

Answer 1

There is GCD. Here is a basic usage:

for page in listOfPages {
    var label = NSTextField()
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)) {
        let result = getInformationFromPage(page)
        dispatch_async(dispatch_get_main_queue()) {
            label.stringValue = result
        }
    }
}

dispatch_async function asynchronously runs the block of code on the given queue. In first dispatch_async call we dispatch the code to run on background queue. After we get result we update label on main queue with that result