let debounceTimer : NSTimer?
 func test() {

        if let timer = debounceTimer {

            timer.invalidate()

        }

        debounceTimer = NSTimer(timeInterval: 0.3, target: self, selector: Selector("searchUsingAPICAll"), userInfo: nil, repeats: false)

        NSRunLoop.currentRunLoop().addTimer(debounceTimer!, forMode: "NSDefaultRunLoopMode")

    }