Objective-C中iOS 6上的强制横向方向

我无法在导航控制器中执行此操作.相反,我所做的是从视图A打开模态视图以查看B并强制新的导航控制器进入此视图.

这在iOS5中对我有用.

您需要为导航控制器创建一个类别,如下所示：

UINavigationController Rotation_IOS6.h

#import <UIKit/UIKit.h> 

@interface UINavigationController (Rotation_IOS6)

- (BOOL)shouldAutorotate;
- (NSUInteger)supportedInterfaceOrientations;
- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation;

@end

UINavigationController Rotation_IOS6.h

#import "UINavigationController+Rotation_IOS6.h"

@implementation UINavigationController (Rotation_IOS6)

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

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

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

@end

在AppDelegate.m中添加：

- (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window{
    return UIInterfaceOrientationMaskAll;
}

然后在视图A中：

- (BOOL)shouldAutorotate {
    return YES;
}

-(NSUInteger)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskPorTrait | UIInterfaceOrientationMaskPorTraitUpsideDown;
}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return UIInterfaceOrientationPorTrait;
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return (interfaceOrientation == UIInterfaceOrientationPorTrait || interfaceOrientation == UIInterfaceOrientationPorTraitUpsideDown);
}

同样在View A中打开View B执行此操作：

ViewB *vc = [[ViewB alloc] initWithNibName:@"ViewB" bundle:nil];

UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:vc];

[self presentViewController:navigationController animated:YES completion:nil];

最后,在View B中

- (BOOL)shouldAutorotate {
    return YES;
}

-(NSUInteger)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskLandscapeRight | UIInterfaceOrientationMaskLandscapeLeft;
}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return UIInterfaceOrientationLandscapeRight;
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return (interfaceOrientation == UIInterfaceOrientationLandscapeRight || interfaceOrientation == UIInterfaceOrientationLandscapeLeft);
}