Question

我看到了这个stackoverflow帖子：shouldAutorotateToInterfaceOrientation is not working in iOS 6。答案是添加一个名为RotationIn_IOS6的类别。我已经这样做了，不同的viewcontrollers的视图在iOS6中正常工作。问题出在iOS5中。

我只需要几个视图就可以向所有方向旋转，其余的应该是纵向或PortraitUpsideDown。我遇到的问题是，要么全部不旋转（code1），要么旋转到横向，它会保持相同的方向，直到你旋转回肖像（code2）。

代码1：

@implementation UINavigationController (RotationIn_IOS6)
-(BOOL)shouldAutorotate
{
    return [[self.viewControllers lastObject] shouldAutorotate];
}

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

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

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{

        return UIInterfaceOrientationIsPortrait(interfaceOrientation);
}
@end

代码2：

@implementation UINavigationController (RotationIn_IOS6)
-(BOOL)shouldAutorotate
{
    return [[self.viewControllers lastObject] shouldAutorotate];
}

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

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

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    if([self.visibleViewController isKindOfClass:[MyClassToRotate class]])
    {
         return [self.visibleViewController shouldAutorotateToInterfaceOrientation:interfaceOrientation];
    }
    else
    {
        return UIInterfaceOrientationIsPortrait(interfaceOrientation);
    }

}

需要一些指导。不知道如何解决这个问题。

编辑：

CODE3：

1）从类别中删除了shouldAutorotateToInterfaceOrientation。 2）将此代码添加到我的特定类

- (BOOL)shouldAutorotate
{
    //returns true if want to allow orientation change
    return TRUE;


}
- (NSUInteger)supportedInterfaceOrientations
{
    //decide number of origination tob supported by Viewcontroller.
    return UIInterfaceOrientationMaskAll;


}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    //from here you Should try to Preferred orientation for ViewController
    return TRUE;
}

结果 - ＆gt;所有的viewcontroller都锁定在肖像中。无法访问PortraitUpsideDown。一旦进入我的视图控制器，它就可以旋转，但当你离开视图控制器时，锁定在风景中..

编辑2：

每个viewcontroller都包含以下代码：

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}


- (NSUInteger)supportedInterfaceOrientations {
    return UIInterfaceOrientationMaskPortrait;
}

- (BOOL)shouldAutorotate {
    return NO;
}

Answer 1

无需覆盖导航控制器类别中的shouldAutorotateToInterfaceOrientation:，而不是iOS 5，每个视图控制器都应使用支持的方向实现shouldAutorotateToInterfaceOrientation:。由容器控制器（导航控制器）确定的支持方向仅在iOS6及更高版本中。在较低版本中，它将调用将要显示的子视图控制器的shouldAutorotateToInterfaceOrientation:

Answer 2

要解决这个问题，我已经将UINavigationController子类化，而不是使用类别：

<强> MyNavigationcontroller.h

#import <UIKit/UIKit.h>
@interface MyNavigationcontroller : UINavigationController
@end

<强> MyNavigationcontroller.m

#import "MyNavigationcontroller.h"
@interface MyNavigationcontroller ()
@end

//Set your init...

-(BOOL)shouldAutorotate {
    if ([[self.viewControllers lastObject] isKindOfClass:NSClassFromString(@"YourClass")]) 
        return YES;
    }
        return NO;
}

-(NSUInteger)supportedInterfaceOrientations {

    if ([[self.viewControllers lastObject] isKindOfClass:NSClassFromString(@"YourClass")]) {
        return UIInterfaceOrientationMaskAll;
    }
        return UIInterfaceOrientationMaskPortraitUpsideDown;
}

@end

然后在每个viewcontroller中覆盖：

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    return (interfaceOrientation == UIInterfaceOrientationMaskPortraitUpsideDown);//or your orientation
}

然后，在发布时，在您的应用代理的didFinishLaunchingWithOptions:中：

NSString *reqSysVer = @"6.0";
NSString *currSysVer = [[UIDevice currentDevice] systemVersion];
    if ([currSysVer compare:reqSysVer options:NSNumericSearch] != NSOrderedAscending) {
        self.navigationController = [[MyNavigationcontroller alloc] initWithRootViewController:masterViewController];//IOS 6
    }else{
        self.navigationController = [[UINavigationController alloc] initWithRootViewController:masterViewController];
    }
self.window.rootViewController = self.navigationController;

Answer 3

最简单的方法是Target-＆gt; General-＆gt;部署信息并勾选您想要的方向。例如。仅勾选纵向，应用程序不会自动旋转。

shouldAutorotateToInterfaceOrientation在iOS 5中不起作用

3 个答案: