TabBarController旋转问题 [英] TabBarController rotation problems

问题描述

整个星期我一直在寻找解决我的独特问题的方法，但是对我来说没有任何效果。我有一个TabBarController有6个选项卡。 iOS自动创建更多选项卡，其中包含我遇到困难的视图控制器仪表板。 仪表板视图控制器充当页面控制器，有3页。

当我按仪表板项目时，我希望屏幕方向从纵向更改去景观。我通过无数其他SO帖子了解到旋转是从父TabBarController控制的。我还了解到更多选项卡实际上是一个导航控制器，它会为混音添加更多​​复杂功能。

重复并直接，当我按下时TabBarController的更多选项卡中的仪表板选项卡，我希望屏幕将其方向从纵向更改为横向。

是的，我已经尝试过这样做： [[UIDevice currentDevice] setValue：[NSNumber numberWithInteger：UIInterfaceOrientationLandscapeLeft] forKey：@orientation]; 并且它不起作用。

我也尝试覆盖TabBarController和MoreNavigationController中与旋转和方向以及子视图有关的所有函数。我将在下面发布我的TabBarController。任何帮助将不胜感激，谢谢。

TabBarViewController.h：

  @interface TabBarViewController：UITabBarController< UINavigationControllerDelegate> {} 
 @end 
  

TabBarViewController.m：

  @implementation TabBarViewController 
  - （void）viewDidLoad 
 {
 [super viewDidLoad]; 
 self.moreNavigationController.delegate = self; 
} 
 
  - （BOOL）shouldAutorotate 
 {
返回YES; 
} 
 
  - （NSUInteger）supportedInterfaceOrientations 
 {
 if（[self.selectedViewController isKindOfClass：[Dashboard class]]）
 {
返回UIInterfaceOrientationMaskLandscape; 
} 
返回UIInterfaceOrientationMaskAll; 
} 
 
  - （BOOL）shouldAutorotateToInterfaceOrientation：（UIInterfaceOrientation）toInterfaceOrientation 
 {
 return YES; 
} 
 
  - （NSUInteger）tabBarControllerSupportedInterfaceOrientations：（UITabBarController *）tabBarController 
 {
 if（[tabBarController.selectedViewController isKindOfClass：[Dashboard class]]）
 {
返回UIInterfaceOrientationMaskLandscape; 
} 
 
返回UIInterfaceOrientationMaskAll; 
} 
 
  - （void）tabBarController：（UITabBarController *）tabBarController didSelectViewController：（UIViewController *）viewController 
 {
 
 NSLog（@tabBarController didSelectViewController =％lu，（unsigned long）tabBarController.selectedIndex）; 
 
} 
 
  - （NSUInteger）navigationControllerSupportedInterfaceOrientations：（UINavigationController *）navigationController 
 {
 if（[navigationController.topViewController isKindOfClass：[Dashboard class]] 
 || [navigationController.topViewController isKindOfClass：[ViewController1 class]] 
 || [navigationController.topViewController isKindOfClass：[ViewController2 class]] 
 || [navigationController.topViewController isKindOfClass：[ViewController3 class] ]）
 {
返回UIInterfaceOrientationMaskLandscape; 
} 
返回UIInterfaceOrientationMaskAllButUpsideDown; 
} 
 
  - （UIInterfaceOrientation）navigationControllerPreferredInterfaceOrientationForPresentation：（UINavigationController *）navigationController 
 {
 NSLog（@navigationControllerPreferredInterfaceOrientationForPresentation）; 
 if（[navigationController.topViewController isKindOfClass：[Dashboard class]] 
 || [navigationController.topViewController isKindOfClass：[ViewController1 class]] 
 || [navigationController.topViewController isKindOfClass：[ViewController2 class] ] 
 || [navigationController.topViewController isKindOfClass：[ViewController3 class]]）
 {
 return UIInterfaceOrientationLandscapeLeft | UIInterfaceOrientationLandscapeRight; 
} 
返回UIInterfaceOrientationPortrait | UIInterfaceOrientationMaskLandscapeRight | UIInterfaceOrientationMaskLandscapeLeft; 
} 
 
  - （void）navigationController：（UINavigationController *）navigationController 
 willShowViewController：（UIViewController *）viewController 
 animated：（BOOL）animated 
 { 
 if（[viewController isKindOfClass：[Dashboard class]]）
 {
 [[UIDevice currentDevice] setValue：[NSNumber numberWithInteger：UIInterfaceOrientationLandscapeLeft] forKey：@orientation]; 
} 
} 
 
 @end 
  

解决方案

更改UITabBarController的方向

虽然有很多可能和尝试这个对于这个问题，主要问题在于每个 UINavigationController 的精心设计，对 supportedInterfaceOrientations的适当响应在 UITabBarController 中，以及一些强制执行所需方向的代码。

很有可能，这可能只是一个iOS错误，因为一旦旋转， UINavBarController 和所有嵌入的 UINavigationController 表现正常。

以下声明不正确。标签栏控制器旋转。

TabBarControllers无法旋转

---

每个 UINavigationController的设置方向

横向示例：

  class Horizo​​ntalNavigationController：UINavigationController {
 override var supportedInterfaceOrientations：UIInterfaceOrientationMask {
 return .landscape 
} 
} 
  

肖像示例：

  class VerticalNavigationController：UINavigationController {
 override var supportedInterfaceOrientations：UIInterfaceOrientationMask {
 return。 portrait 
} 
} 
  

推迟 TabBarController 所选视图控制器的方向

  class TabBarController：UITabBarController {
覆盖var supportedInterfaceOrientations：UIInterfaceOrientationMask {
 if let selectedViewController = selectedViewController {
 return selectedViewController.supportedInterfaceOrientations 
} 
 return .allButUpsideDown 
} 
} 
  

强制更改界面方向

这是 UITabBarController 的争议方面。不知何故，方向改变不会像在 UINavigationController 中那样发生，并且需要轻推。

待办事项因此，使用最少量的代码，使用Object并将其子类化为 TabBarControllerDelegate 。您可以

---

►在 GitHub 以及有关 Swift Recipes <的其他详细信息/ a>。

All week I have been searching SO for a solution to my unique problem, but nothing has worked for me yet. I have a TabBarController that has 6 tabs. iOS automatically creates the "More" tab, which contains the view controller,"Dashboard", that I am having difficulty with. The "Dashboard" view controller is acting as a page controller that has 3 pages.

When I press the "Dashboard" item, I want the screen orientation to change from Portrait to Landscape. I've learned through countless other SO posts that rotation is controlled from the parent TabBarController. I have also learned that the "More" tab is actually a navigation controller, which adds some more complication to the mix.

To reiterate and be direct, when I press the "Dashboard" tab in the TabBarController's "More" tab, I want the screen to change its orientation from Portrait to Landscape.

And YES, I have already tried this: [[UIDevice currentDevice] setValue:[NSNumber numberWithInteger: UIInterfaceOrientationLandscapeLeft]forKey:@"orientation"]; and it didn't work.

I've also tried overriding every function in the TabBarController and MoreNavigationController that has to do with rotation and orientation, as well as in the child views. I will post my TabBarController below. Any help will be appreciated, thanks.

TabBarViewController.h:

@interface TabBarViewController : UITabBarController<UINavigationControllerDelegate>{}
@end

TabBarViewController.m:

@implementation TabBarViewController
- (void)viewDidLoad
{
    [super viewDidLoad];
    self.moreNavigationController.delegate = self;
}

- (BOOL)shouldAutorotate
{
    return YES;
}

- (NSUInteger)supportedInterfaceOrientations
{
    if([self.selectedViewController isKindOfClass:[Dashboard class]])
    {
        return UIInterfaceOrientationMaskLandscape;
    }
    return UIInterfaceOrientationMaskAll;
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation
{
    return YES;
}

- (NSUInteger)tabBarControllerSupportedInterfaceOrientations:(UITabBarController *)tabBarController
{
    if([tabBarController.selectedViewController isKindOfClass:[Dashboard class]])
    {
        return UIInterfaceOrientationMaskLandscape;
    }

    return UIInterfaceOrientationMaskAll;
}

- (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController
{

    NSLog(@"tabBarController didSelectViewController = %lu", (unsigned long)tabBarController.selectedIndex);

}

- (NSUInteger)navigationControllerSupportedInterfaceOrientations:(UINavigationController *)navigationController
{
    if([navigationController.topViewController isKindOfClass:[Dashboard class]]
       || [navigationController.topViewController isKindOfClass:[ViewController1 class]]
       || [navigationController.topViewController isKindOfClass:[ViewController2 class]]
       || [navigationController.topViewController isKindOfClass:[ViewController3 class]])
    {
        return UIInterfaceOrientationMaskLandscape;
    }
    return UIInterfaceOrientationMaskAllButUpsideDown;
}

- (UIInterfaceOrientation)navigationControllerPreferredInterfaceOrientationForPresentation:(UINavigationController *)navigationController
{
    NSLog(@"navigationControllerPreferredInterfaceOrientationForPresentation");
    if([navigationController.topViewController isKindOfClass:[Dashboard class]]
       || [navigationController.topViewController isKindOfClass:[ViewController1 class]]
       || [navigationController.topViewController isKindOfClass:[ViewController2 class]]
       || [navigationController.topViewController isKindOfClass:[ViewController3 class]])
    {
        return UIInterfaceOrientationLandscapeLeft | UIInterfaceOrientationLandscapeRight;
    }
    return UIInterfaceOrientationPortrait|UIInterfaceOrientationMaskLandscapeRight|UIInterfaceOrientationMaskLandscapeLeft;
}

- (void)navigationController:(UINavigationController *)navigationController
      willShowViewController:(UIViewController *)viewController
                    animated:(BOOL)animated
{
    if([viewController isKindOfClass:[Dashboard class]])
    {
        [[UIDevice currentDevice] setValue:[NSNumber numberWithInteger: UIInterfaceOrientationLandscapeLeft]forKey:@"orientation"];
    }
}

@end

解决方案

Changing the orientation of a UITabBarController

While there are dozens of maybe and try this for this problem, the main issue reside in the careful design of each UINavigationController, a proper response to supportedInterfaceOrientations in the UITabBarController, and some code to enforce the desired orientation.

In all likelihood, this may just be an iOS bug, since once rotated, the UINavBarController and all embedded UINavigationController behave correctly.

The following statement is not true. Tab bar controllers do rotate.

TabBarControllers can't rotate

---

Setup orientation for each UINavigationController

Landscape example:

class HorizontalNavigationController: UINavigationController {
    override var supportedInterfaceOrientations : UIInterfaceOrientationMask {
        return .landscape
    }
}

Portrait example:

class VerticalNavigationController: UINavigationController {
    override var supportedInterfaceOrientations : UIInterfaceOrientationMask {
        return .portrait
    }
}

Defer TabBarController orientation to selected view controller

class TabBarController: UITabBarController {
    override var supportedInterfaceOrientations : UIInterfaceOrientationMask {
        if let selectedViewController = selectedViewController {
            return selectedViewController.supportedInterfaceOrientations
        }
        return .allButUpsideDown
    }
}

Enforce the interface orientation change

This is the contentious aspect of UITabBarController. Somehow, the orientation change does not happen like it would in a UINavigationController, and needs a nudge.

To do so with the fewest amount of code, use an Object and subclass it into a TabBarControllerDelegate. You can do most of the work in Interface Builder.

class TabBarControllerDelegate: NSObject, UITabBarControllerDelegate {
    func tabBarController(_ tabBarController: UITabBarController, didSelect viewController: UIViewController) {
        let orientedViewController = UIViewController()

        tabBarController.present(orientedViewController, animated: false) { () -> Void in
            tabBarController.dismiss(animated: false, completion: { () -> Void in
            })
        }
    }
}

Storyboard Structure

Using a Storyboard helps visualize the structure of the application as well as the relationship between all classes.

---

► Find this solution on GitHub and additional details on Swift Recipes.

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