Orientation in a UIView added to a UIWindow

Question

I have a UIView which is supposed to cover the whole device (UIWindow) to support an image zoom in/out effect I'm doing using core animation where a user taps a button on a UITableViewCell and I zoom the associated image.

The zooming is performing flawlessly, what I haven't been able to figure out is why the subview is still in portrait mode even though the device is in landscape. An illustration below:

I do have a navigation controller but this view has been added to the UIWindow directly.

Answer 1

You can read about some of the possible causes here:
Technical Q&A QA1688 - Why won't my UIViewController rotate with the device?

In your situation its probably the fact that you are adding the view as another subview to the window. Only the first subview gets the rotation events. What you can do is add it as a subview of the first window subview.

UIWindow* window = [UIApplication sharedApplication].keyWindow; if (!window)      window = [[UIApplication sharedApplication].windows objectAtIndex:0]; [[[window subviews] objectAtIndex:0] addSubview:myView];     

Answer 2

The problem

Beginning with iOS 6, only the topmost view controller (alongside the UIApplication object) participates in deciding whether to rotate in response to a change of the device's orientation.

https://developer.apple.com/library/content/qa/qa1688/_index.html

The solution

I have open sourced a pod named AGWindowView.
It will automatically deal with any rotation and framechanges so you won't have to worry about that.

The code

It supports any combination of SDK's and iOS system versions. The relevant code can be found here: https://github.com/hfossli/AGWindowView/blob/master/Source/AGWindowView.m