Where can I set a UINavigationControllers supportedOrientations?

问题

I am using iOS 6.0 beta and my rotations do not work anymore.

According to this http://news.yahoo.com/apple-ios-6-beta-3-changes-182849903.html a UINavigation Controller does not consult their children to determine whether they should autorotate.

I am not using shouldAutorotateToInterfaceOrientation: anymore as it is deprecated. Instead I am using supportedInterfaceOrientations: and shouldAutoRotate: and they are working fine until I place a ViewController into a NavigationController (as a Child). From then on the orientations specified in the ViewController do not work anymore. It seems it is using the orientations set by the navigation controller (UIInterfaceOrientationMaskAllButUpsideDown)

How can I set the InterfaceOrientations for the NavigationController so that my ViewControllers are locked to Portrait-Orientation?

Do I have to subclass UINavigationController and set the InterfaceOrientations there? Isn't it bad practise to subclass UINavigationController still in iOS 6.0?

Thanks for you help heaps!

Cheers!

回答1:

If you want it to consult it's children again you can add a category to UINavigationController

@implementation UINavigationController (Rotation_IOS6)

-(BOOL)shouldAutorotate
{
    return [[self.viewControllers lastObject] shouldAutorotate];
}

-(NSUInteger)supportedInterfaceOrientations
{
    return [[self.viewControllers lastObject] supportedInterfaceOrientations];
}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return [[self.viewControllers lastObject] preferredInterfaceOrientationForPresentation];
}

@end

回答2:

Subclass UINavigationController

//OnlyPortraitNavigationController.h

@interface OnlyPortraitNavigationController : UINavigationController

//OnlyPortraitNavigationController.m

@implementation OnlyPortraitNavigationController

- (BOOL)shouldAutorotate {
    return NO;
}

-(UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return UIInterfaceOrientationPortrait; //for locked only Portrait
}

present new subclass navigationController with your portrait ViewController

SomeViewController *onlyPortraitVC = [[SomeViewController alloc]init];

OnlyPortraitNavigationController *portraitNav = [[OnlyPortraitNavigationController alloc]initWithRootViewController:onlyPortraitViewController];

[self presentViewController:portraitNav animated:YES completion:NULL];

this is work on my app hope it can help you.

来源：https://stackoverflow.com/questions/12169517/where-can-i-set-a-uinavigationcontrollers-supportedorientations

标签

objective-c

uinavigationcontroller

ios6