Rotating IPad Screen Orientation on Different Views

Question

I have an iPad application that opens up in portrait mode but when I switch to another view I need to force the orientation to landscape so that the user realises they need to physically move the screen orientation to landscape, and then when they leave this view I need to force the orientation back to portrait.

I can see the ShouldAutorotateToInterfaceOrientation(UIInterfaceOrientation toInterfaceOrientation) which if believe correctly just restricts the orientations that are possible for the view but setting this to one orientation (e.g. UIInterfaceOrientation.LandscapeRight) doesn't force the orientation to change.

I've seen some other suggestions about forcing the View to rotate using this.View.Transform.Rotate(...) but doesn't seem to work for me.

Just wondering if anyone had any suggestions or be able to point me in the right direction?

Thanks

score 1 · Answer 1 · answered Jul 18 '12 at 12:42

1

First, set ShouldAutorotateToInterfaceOrientation to support landscape orientation only. Then use this hack to force orientation change:

var c = new UIViewController ();
PresentModalViewController (c, false);
DismissModalViewControllerAnimated (false);

answered Jul 18 '12 at 12:42

Ivan Nikitin

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Thanks for this. It seems to rotate the page correctly but when I then go and rotate the iPad physically the page rotates again and is out of syn and don't seem to get it back as it keeps moving everytime I rotate the iPad. I'm using your code above and then pushing the UIViewController I have onto a navigationController to display the view. – Gavin Jul 18 '12 at 13:51
Do you return a correct value from ShouldAutorotateToInterfaceOrientation after manually forcing rotation? – Ivan Nikitin Jul 19 '12 at 08:17

score 1 · Accepted Answer · edited May 23 '17 at 12:31

Are your views all displayed within a single uinavigationcontroller?

If they are, then I'm afraid that the answer is that you cannot achieve what you are looking to - see a full explanation, including links to the Apple developer docs on: How to constrain autorotation to a single orientation for some views, while allowing all orientations on others?

If you do want to achieve the effect you are looking for the, then maybe switch to using some other "parent" for all your child views - e.g. displaying them modally?

Rotating IPad Screen Orientation on Different Views

2 Answers2