title: How to use requestReview (SKStore​Review​Controller) to show review popup in the current viewController after a random period of time
body: <p>I've read about this new feature available in iOS 10.3 and thought it will be more flexible and out of the box. But after I read the <a href="https://developer.apple.com/reference/storekit/skstorereviewcontroller?language=objc" rel="noreferrer">docs</a> I found out that you need to decide the time to show it and the viewController who calls it. Is there any way I can make it trigger after a random period of time in any viewController is showing at that moment?   </p>