Force Landscape Orientation on iOS 6 in Objective-C

Question

I have a master view controller that\'s inside a UINavigationController. In that master view controller, I have a button that pushes a detail view controller that has a UIWe

Answer 1

They kinda screwed the pooch in iOS 6 with regard to this. Here's what I've figured out so far:

First off, Apple added the "Supported Interface Orientations" buttons with Xcode 4.5. This corresponds to the "Supported interface orientations" attribute in _info.plist. These buttons must be toggled to the correct choices before any of the rest will work. (If the buttons seem to refuse to toggle it's likely because the info.plist is locked by CVS or some other process.)

Next, the property .window.rootViewController must be set, and must point to the "bottom" view controller in the stack. Generally this will be either a navigation controller or a tab controller.

If the desire is to disable all rotation, this can be done using the buttons, or one can implement, in the "bottom" view controller, the "shouldAutorotate" method and have it return NO. (If the method is omitted then the default is YES.)

In spite of having autorotation disabled with shouldAutorotate, if there is a MPMoviePlayerViewController being displayed, that will autorotate. Only toggling the supported interface orientation buttons appears to prevent this.

If one wants to conditionally autorotate other view controllers it gets messier. Basically, your "bottom" view controller must implement the supportedInterfaceOrientations method and return, based on the current topViewController, the appropriate bit mask. This can be done with a routine that queries the topViewController's old "shouldAutorotateToInterfaceOrientation" method, but it's a bit ugly. And even though this scheme doesn't require modifying the rotating view controller's code, you DO need to modify the VC just "below" the rotated one to implement "supportedInterfaceOrientation", or else that view will be rotated on return. (At least this is a simple copy/paste.) No one seems to have come up with a better, more general scheme, though.