透明查看从黑色到其他颜色的颜色？

Question

I noticed that if I set views background color to transparent, the background color turns black (which I guess is default "viewport" color) after segue transition ends.

Can I change that? Of course I could just change color from transparent to purple, but maybe there is a way?

Answer 1

It's the default background color of your UIWindow . Either set it from your app delegate :

self.window.backgroundColor = [UIColor whiteColor];

or by looking up the window of any view currently on-screen, in any view controller:

anyView.window.backgroundColor = ...

Answer 2

You should add this line:

self.navigationController?.modalPresentationStyle = UIModalPresentationStyle.CurrentContext
presentedViewController.modalPresentationStyle = UIModalPresentationStyle.OverCurrentContext

Before presenting:

self.presentViewController(presentedViewController, animated: true, completion: nil)