I have an OpenGL app which supports dynamic device orientation. I can rotate the device to any of the 4 physical orientations and everything works as expected.
Now I've added a modal view controller so that you can get a settings view (this is non-OpenGL). The modal view controller also supports any device orientation.
However, if I present the modal view controller in orientation A (e.g. portrait) and dismiss it in orientation B (e.g. landscape-right), after it is dimissed, the OpenGL view is corrupted (the aspect ratio looks wrong). I have to orient the device to a different orientation for the OpenGL view to 'correct' itself.
When the modal view controller is dismissed, it's like the app thinks that it's already in orientation B, so it doesn't ever rotate the OpenGL view.
If I disable rotation on the modal view controller, then if I present the modal controller in orientation A, rotate the device to orientation B (the modal view controller no longer rotates) and dismiss the controller, the OpenGL view gets willRotateToInterfaceOrientation/didRotateFromInterfaceOrientation and correctly orients to orientation B.
Is there any way to preserve the dynamic orientation of the modal controller, yet have the OpenGL view also properly rotate after the modal controller is dismissed?
Thank you.
I had a similar issue with a custom action sheet, and decided that the simplest answer would be to temporarily disallow rotation while the view is presented. You can see an example of this in the Apple Notes app, whenever an action sheet is presented the orientation becomes locked.
I know you've already tried this and it works, I just think you should consider that as a valid solution.
I'm not sure how to solve it otherwise, you would probably need to store any changes in orientation in your modal view controller and pass them back to the OpenGL view controller, either at the same time or once at the point of dismissing the settings view, then manually re-render.
Related
I'm trying to work with the iOS6 Auto-rotation mess.
I've looked at almost every single SO question relating to it, and no matter what I try, I can't get rotation working how I need it.
The app is using storyboards, and the layout is as follows:
Navigation controller ---> Root view controller ---> Tab view controller ---> View controller ---> Landscape view controller.
The view controller auto-rotates when I rotate the simulator, but when segueing back to the previous view (that is set to portrait), the view becomes landscape, when it should be portrait. If I rotate the simulator back, the view auto-rotates to portrait again, but this should've been done automatically!
I've implemented (UIInterfaceOrientation)preferredInterfaceOrientationForPresentationand it doesn't get called in any view controller I put it in.
I've subclassed the NavigationController to return the topViewController's shouldAutoRotate, supportedInterfaceOrientations and preferredInterfaceOrientationForPresentation and auto-rotation when rotating the simulator seems to work, but preferredInterfaceOrientationForPresentation never does its job.
Does anyone have a solution to this?
It would appear Apple have removed the ability to push a view in a specific orientation. preferredInterfaceOrientationForPresentation does get called, but only when popping back or presenting a view controller. I had to present my landscape view rather than push it, and set shouldAutoRotate = NO.
Refer to: In iOS6, trouble forcing ViewController to certain interfaceOrientation when pushed on stack for more details.
I have a UIPageViewController with a view controllers called UIZoomedImageViewController. The UIZoomedImageViewController has different layout/positioning depending whether it's portrait or landscape. I have a method called setViewBasedOnOrientation that is called on willAnimateToInterfaceOrientation.
The issue I am having now however is that when I rotate the device and swipe to the next view controller it still has the size/layout of the previous orientation. How do I deal with this?
I have a UIViewController, which launches a modal view controller. Both have orientation support. If i rotate with the modal view controller there, it doesn't tell the view controller behind it that rotation has happened, and so when the modal view controller is dismissed, the original view is in the right orientation, but at the original sizes (e.g. i rotate it to be 480x320, the text and other items will be the correct way up for the new orientation, but will still be arranged in their 320x480 layout). How do i let the view controller know rotation has occurred?
use NSNotification.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// send a notification here
}
In your ViewController behind, add an observer and call a method to fix the layout.
An old SO answer explaining the sytntax for NSNotification
I hope its useful
I have a UINavigationController-based app that only supports portrait, but need to push one view that requires landscape. I've found a previous post that describes how to allow mixed rotations for a single view, but what is the process for forcing a single view, when pushed, to be in landscape then returning the app to portrait mode when the view is popped.
Thanks!
You cannot force an orientation change just by pushing onto the nav stack. What you can do instead is present the view controller which must be landscape as a modal view controller instead.
I've created a custom UIViewController that mimics the UISplitViewController. It manages two child view controllers that get displayed in the left & right body area while in landscape and hides the left to show in a popover when in portrait. It works fine, using the didRotateFromInterfaceOrientation: and willRotateToInterfaceOrientation: messages to reset the location and sizing of the child views. All the views and child controllers are loaded from a nib. This custom view controller is shown inside a UINavigationController.
The trouble arises after one of the child view controllers uses presentModalViewController. If the device was rotated after the views were initialized (but before the modal controller is shown), after the modal dialog is dismissed, the left and/or body views will be re-rendered in a different rotation than they were before the modal dialog was changed.
I'm wondering if folks have had a similar problem, and what the solution is. I'm sure sample code would be helpful, but it'll take a bunch of work to distill it into a runnable sample.
When I saw this same behavior in my split view app, I noticed that it only happens when I'm holding the device in "left home button" landscape. I had set my initial interface orientation to "right home button" but was allowing either left or right home button landscape orientations (no portrait orientation for this app). My solution was to no longer support left home button landscape orientation and now all post-modal subviews display reliably.