Objectivec IOS 6强制设备方向为横向

好的，各位，我会发布我的解决方案.

我所拥有的:

1. 基于视图的应用程序，具有多个视图控制器.(它是基于导航的，但由于方位问题，我不得不让它基于视图).
2. 所有视图控制器都是纵向的，只有一个除外-景观左.

任务:

1. 我的一个视图控制器必须自动旋转到横向，无论用户如何握住设备.所有其他控制器都必须是纵向的，离开横向控制器后，应用程序必须强制旋转到纵向，无论用户如何握住设备.
2. 这必须在IOS 6上运行.IOS 5上的x.十、

go

(Update删除了@Ivan Vučica建议的宏)

In all your PORTRAIT view controllers override autorotation methods like this:

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation{
    return (toInterfaceOrientation == UIInterfaceOrientationPortrait);
}
-(BOOL)shouldAutorotate {
    return YES;
}
- (NSUInteger)supportedInterfaceOrientations {
    return UIInterfaceOrientationMaskPortrait;
}

您可以看到两种方法:一种用于IOS 5，另一种用于IOS 6.

The same for your LANDSCAPE view controller, with some additions and changes:

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation{
    [image_signature setImage:[self resizeImage:image_signature.image]];
    return (toInterfaceOrientation == UIInterfaceOrientationLandscapeLeft);
}
-(BOOL)shouldAutorotate {
    return YES;
}
- (NSUInteger)supportedInterfaceOrientations {
    [image_signature setImage:[self resizeImage:image_signature.image]];
    return UIInterfaceOrientationMaskLandscapeLeft;
}

ATTENTION:要在IOS 5中强制自动旋转，应添加以下内容:

- (void)viewDidLoad{
    [super viewDidLoad];
    if ([[[UIDevice currentDevice] systemVersion] floatValue] < 6.0)
        [[UIApplication sharedApplication] setStatusBarOrientation:UIDeviceOrientationLandscapeLeft animated:NO];    
}

类似地，在离开横向控制器后，无论加载什么控制器，都应该再次强制IOS 5自动旋转，但现在，当您转到纵向控制器时，将使用UIDeviceOrientationPortrait:

- (void)viewDidLoad{
        [super viewDidLoad];
        if ([[[UIDevice currentDevice] systemVersion] floatValue] < 6.0)
            [[UIApplication sharedApplication] setStatusBarOrientation:UIDeviceOrientationPortrait animated:NO];    
    }

Now the last thing (and it's a bit weird) - you have to change the way you switch from a controller to another, depending on the IOS:

制作一个NSObject类"Schalter"("Switch"来自德语).

在Schalter.h说:

#import <Foundation/Foundation.h>

@interface Schalter : NSObject
+ (void)loadController:(UIViewController*)VControllerToLoad andRelease:(UIViewController*)VControllerToRelease;
@end

在Schalter.我说:

#import "Schalter.h"
#import "AppDelegate.h"

@implementation Schalter
+ (void)loadController:(UIViewController*)VControllerToLoad andRelease:(UIViewController*)VControllerToRelease{

    //adjust the frame of the new controller
    CGRect statusBarFrame = [[UIApplication sharedApplication] statusBarFrame];
    CGRect windowFrame = [[UIScreen mainScreen] bounds];
    CGRect firstViewFrame = CGRectMake(statusBarFrame.origin.x, statusBarFrame.size.height, windowFrame.size.width, windowFrame.size.height - statusBarFrame.size.height);
    VControllerToLoad.view.frame = firstViewFrame;

    //check version and go
    if (IOS_OLDER_THAN_6)
        [((AppDelegate*)[UIApplication sharedApplication].delegate).window addSubview:VControllerToLoad.view];
    else
        [((AppDelegate*)[UIApplication sharedApplication].delegate).window setRootViewController:VControllerToLoad];

    //kill the previous view controller
    [VControllerToRelease.view removeFromSuperview];
}
@end

NOW, this is the way you use Schalter ( suppose you go from Warehouse controller to Products controller ) :

#import "Warehouse.h"
#import "Products.h"

@implementation Warehouse
Products *instance_to_products;

- (void)goToProducts{
    instance_to_products = [[Products alloc] init];
    [Schalter loadController:instance_to_products andRelease:self];
}

bla-bla-bla your methods

@end

当然，您必须释放instance_to_products个对象:

- (void)dealloc{
     [instance_to_products release];
     [super dealloc];
}

Well, this is it. Don't hesitate to downvote, I don't care. This is for the ones who are looking for solutions, not for reputation. Cheers! Sava Mazare.