iOS 6: how to force change orientation when pushin

问题:

This question already has answers here:

In iOS6, trouble forcing ViewController to certain interfaceOrientation when pushed on stack (3 answers)

Closed 6 years ago.

I think this question should've been asked a million times by now, but I still can't find an answer to this.

Here's my hierarchy: UINavigationController -> UIViewController 1 ->(push)-> UIViewController 2

UINavigationController: supports all possible orientation UIViewController 1: supports only portrait UIViewController 2: supports only landscape

How can I lock UIViewController 1 into portrait only and at the same time lock UIViewController 2 into landscape only? Is it even possible? So far what I see is that UIViewController 2 always takes the orientation of UIViewController 1.

Note, that this is for iOS 6 only.

Thanks!

回答1:

I am also find the same problem.i have found that shouldAutorotate function not call every time so i change orientation programmatic

first import this

#import <objc/message.h>

then

-(void)viewDidAppear:(BOOL)animated
{

     if(UIDeviceOrientationIsPortrait(self.interfaceOrientation)){
        if ([[UIDevice currentDevice] respondsToSelector:@selector(setOrientation:)])
        {
            objc_msgSend([UIDevice currentDevice], @selector(setOrientation:), UIInterfaceOrientationLandscapeLeft );


        }
    }

}

hope this help you.

回答2:

Add new Objective-C class (subclass of UINavigationController) and add the following code to the .m files

-(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];
  }

After you added the new classes go to your ViewController classes and make the following changes

- (BOOL)shouldAutorotate  // iOS 6 autorotation fix
  {
    return YES;
  }
- (NSUInteger)supportedInterfaceOrientations // iOS 6 autorotation fix
  {
      return UIInterfaceOrientationMaskAll;
  }

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation // iOS 6 autorotation fix
  {
      return UIInterfaceOrientationPortrait;
  }
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation
  {
      return YES;
  }

In the shouldAutorotate , shouldAutorotateToInterfaceOrientation: return YES if you want the ViewController to be supporting Multiple orientation else return NO , also in houldAutorotateToInterfaceOrientation: method pass the Orintation you want for that specific ViewController , Repeat the same for all the view controllers .

Reason of doing this:-

1:Although you can change the preferredInterfaceOrientationForPresentation: of any viewController to a specific orientation but since you are using the UINavigationController you also need to override the supportedInterfaceOrientations for your UINavigationController

2:In order the override the supportedInterfaceOrientations for UINavigationController we have subclassed UINavigationController and modified the method related to the UINavigation Orientation.

Hope it will help you !

回答3:

Make the app support only portrait mode and add the following line to the initWithNibName of UIViewController 2

self.view.transform = CGAffineTransformMakeRotation(M_PI/2);