IOS 6强制设备定位到景观 [英] IOS 6 force device orientation to landscape

问题描述

我给了一个应用程序说10个视图控制器。我使用导航控制器来加载/卸载它们。

I gave an app with say 10 view controllers. I use navigation controller to load/unload them.

除了一个以外的所有人都处于纵向模式。假设第7个VC在景观中。我需要它在加载时以横向呈现。

All but one are in portrait mode. Suppose the 7th VC is in landscape. I need it to be presented in landscape when it gets loaded.

请建议在IOS 6中强制定位从纵向到横向的方法（最好在IOS 5中工作好吧）。

Please suggest a way to force the orientation go from portrait to landscape in IOS 6 (and it will be good to work in IOS 5 as well).

以下是我的表现之前 IOS 6：

Here is how I was doing it BEFORE IOS 6:

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    UIViewController *c = [[[UIViewController alloc]init] autorelease];
    [self presentModalViewController:c animated:NO];
    [self dismissModalViewControllerAnimated:NO];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation{
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}

呈现和解雇模态VC迫使应用程序检查其方向，因此 shouldAutorotateToInterfaceOrientation 被调用。

Presenting and dismissing a modal VC was forcing the app to review its orientation, so shouldAutorotateToInterfaceOrientation was getting called.

我在IOS 6中尝试的内容：

- (BOOL)shouldAutorotate{
    return YES;
}
-(NSUInteger)supportedInterfaceOrientations{
    return UIInterfaceOrientationMaskLandscape;
}
- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation{
    return UIInterfaceOrientationLandscapeLeft;
}

在加载时，控制器保持纵向。旋转设备后，方向改变就好了。但是我需要让控制器在加载时自动旋转到景观，因此用户必须旋转设备才能正确查看数据。

On load, the controller keeps staying in portrait. After rotating the device, the orientation changes just ok. But I need to make the controller to rotate automatically to landscape on load, thus the user will have to rotate the device to see the data correctly.

另一个问题：旋转后虽然我已经在 supportedInterfaceOrientations 中指定 UIInterfaceOrientationMaskLandscape ，但设备回到纵向，方向转到纵向。为什么会这样？

Another problem: after rotating the device back to portrait, the orientation goes to portrait, although I have specified in supportedInterfaceOrientations only UIInterfaceOrientationMaskLandscape. Why it happens?

此外，上述3种方法的无也会被调用。

Also, NONE of above 3 methods are getting called.

一些（有用的）数据：

1. 在我的plist文件中，我指定了3个方向 - 除了上升外


2. 该项目是在Xcode 4.3 IOS 5中启动的。包括xib在内的所有类都是在Xcode 4.5 IOS 6之前创建的，现在我使用的是最后一个版本。


3. 在plist文件中，状态栏设置为可见。


4. 在xib文件中（我希望在横向上）状态栏为无，方向设置为到景观。

1. In my plist file I have specified 3 orientations - all but upside down.
2. The project was started in Xcode 4.3 IOS 5. All classes including xibs were created before Xcode 4.5 IOS 6, now I use the last version.
3. In plist file the status bar is set to visible.
4. In xib file (the one I want to be in landscape) the status bar is "None", the orientation is set to landscape.

任何帮助表示赞赏。谢谢。

Any help is appreciated. Thanks.

推荐答案

好的，伙计们，我会发布我的解决方案。

Ok, folks, I will post my solution.

我有什么：

1. 基于视图的应用程序，带有多个视图控制器。 （这是基于导航的，但由于方向问题，我不得不基于视图）。


2. 所有视图控制器都是纵向的，除了一个 - landscapeLeft。

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。所有其他控制器必须是纵向的，并且在离开横向控制器后，应用程序必须强制旋转为纵向，无论用户如何握住设备。


2. 这必须像以前一样工作IOS 6.x和IOS 5.x一样

Go！

（更新删除了@IvanVučica建议的宏）

(Update Removed the macros suggested by @Ivan Vučica)

在所有PORTRAIT视图控制器中覆盖自动旋转方法如下：

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

您可以看到2种方法：一种用于IOS 5，另一种用于IOS 6 。

You can see the 2 approaches: one for IOS 5 and another For IOS 6.

您的LANDSCAPE视图控制器也是如此，有一些补充和更改：

- (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;
}

注意：强制在中进行自动旋转IOS 5 你应该加上这个：

ATTENTION: to force autorotation in IOS 5 you should add this:

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

类似地，在您离开LANDSCAPE控制器后，无论您加载什么控制器，都应该强制再次自动旋转IOS 5，但现在你将使用 UIDeviceOrientationPortrait ，当你去PORTRAIT控制器时：

Analogically, after you leave the LANDSCAPE controller, whatever controller you load, you should force again autorotation for IOS 5, but now you will use UIDeviceOrientationPortrait, as you go to a PORTRAIT controller:

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

现在最后一件事（而且有点奇怪） - 你必须改变你从控制器切换到另一个控制器的方式，具体取决于IOS：

制作一个NSObject类Schalter（来自德语的Switch） ）。

Make an NSObject class "Schalter" ("Switch" from German).

在Schalter.h中说：

In Schalter.h say:

#import <Foundation/Foundation.h>

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

在Schalter.m中说：

In Schalter.m say:

#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

现在，这就是你的方式使用Schalter（假设您从Warehouse控制器转到Products控制器）：

#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

当然你必须发布 instance_to_products 对象：

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

嗯，就是这样。不要犹豫，我不在乎。这适用于那些寻求解决方案而非声誉的人。
干杯！
Sava Mazare。

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