Create a UIProgressView to go from 0.0 (empty) to 1.0 (full) in 3 seconds

Question

Basically I want to create a UIProgressView to go from 0.0 (empty) to 1.0 (full) in 3 seconds. Could anyone point me in the right direction for using NSTimer in swift with UIProgressView?

Answer 1

I created my own solution after searching for one and coming across this question.

extension UIProgressView {

    func setAnimatedProgress(progress: Float,
        duration: NSTimeInterval = 1,
        delay: NSTimeInterval = 0,
        completion: () -> ()
    ) {
        dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0)) {
            sleep(UInt32(delay))
            dispatch_async(dispatch_get_main_queue()) {
                self.layer.speed = Float(pow(duration, -1))
                self.setProgress(progress, animated: true)
            }
            sleep(UInt32(duration))
            dispatch_async(dispatch_get_main_queue()) {
                self.layer.speed = 1
                completion()
            }
        }
    }
}