iOS 7. Change page orientation only for one view controller - ios

Question

I have iPhone application that supports only Portrait orientation. I want to add to my project view controller that will support only Landscape orientation? Is it possible? If yes how could I achieve that?
I have tried to crate category file like this:
#implementation UINavigationController (Rotation_IOS7)
-(BOOL)shouldAutorotate
{
return YES;
}
-(NSUInteger)supportedInterfaceOrientations
{
return UIInterfaceOrientationMaskLandscape;
}
If I do this I get this error:
Terminating app due to uncaught exception UIApplicationInvalidInterfaceOrientation, reason: Supported orientations has no common orientation with the application, and shouldAutorotate is returning YES

Answer 1

I've tried this and it works: http://www.sebastianborggrewe.de/only-make-one-single-view-controller-rotate/
First, add these code to your AppDelegat class.
- (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window {
// Get topmost/visible view controller
UIViewController *currentViewController = [self topViewController];
// Check whether it implements a dummy methods called canRotate
if ([currentViewController respondsToSelector:#selector(canRotate)]) {
// Unlock landscape view orientations for this view controller
return UIInterfaceOrientationMaskAllButUpsideDown;
}
// Only allow portrait (standard behaviour)
return UIInterfaceOrientationMaskPortrait;
}
- (UIViewController*)topViewController {
return [self topViewControllerWithRootViewController:[UIApplication sharedApplication].keyWindow.rootViewController];
}
- (UIViewController*)topViewControllerWithRootViewController:(UIViewController*)rootViewController {
if ([rootViewController isKindOfClass:[UITabBarController class]]) {
UITabBarController* tabBarController = (UITabBarController*)rootViewController;
return [self topViewControllerWithRootViewController:tabBarController.selectedViewController];
} else if ([rootViewController isKindOfClass:[UINavigationController class]]) {
UINavigationController* navigationController = (UINavigationController*)rootViewController;
return [self topViewControllerWithRootViewController:navigationController.visibleViewController];
} else if (rootViewController.presentedViewController) {
UIViewController* presentedViewController = rootViewController.presentedViewController;
return [self topViewControllerWithRootViewController:presentedViewController];
} else {
return rootViewController;
}
}
Then, in your landscape view controller, add this method
- (void)canRotate { }

Answer 2

I have search through numerous topics and finally found a working solution.
In my example, I have two VC's:
A -> VC that is embedded inside Nav. Controller and should only support Portrait view.
B -> VC that is not embedded inside a VC and should support Landscape only.
I would like to go from view A to view B (by pressing a button) and back to view then A with the specific orientations still correct.
I. Create a Category for UINavigationController and write the following in its .m file: (the code will be automatically called)
- (NSUInteger)supportedInterfaceOrientations
{
NSLog(#"supportedInterfaceOrientations = %d ", [self.topViewController supportedInterfaceOrientations]);
return [self.topViewController supportedInterfaceOrientations];
}
- (BOOL)shouldAutorotate
{
return self.topViewController.shouldAutorotate;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// You do not need this method if you are not supporting earlier iOS Versions
return [self.topViewController shouldAutorotateToInterfaceOrientation:interfaceOrientation];
}
II.
Create a modal segue between A and B and after that between another one between B and A.
III. Write down in each of the View Controllers .m files the following:
- (NSUInteger)supportedInterfaceOrientations
{
return UIInterfaceOrientationMaskLandscape;
}
OR
- (NSUInteger)supportedInterfaceOrientations
{
return UIInterfaceOrientationMaskPortrait;
}
After adding this code. You will be able to change orientation for the single view B.

Answer 3

Edit:
create a category in .h and then implement those methods
use these methods in the view controller where you want to support landscape
#implementation UINavigationController (Rotation_IOS7)
-(BOOL)shouldAutorotate
{
return YES;
}
-(NSUInteger)supportedInterfaceOrientations
{
return UIInterfaceOrientationMaskLandscape;
}