在iOS 7中，shouldAutorotate、supportedInterfaceOrientations和preferredInterfaceOrientationForPresentation不像预期的那样起作用。

Question

我在尝试阻止某些视图的方向，但代码不起作用。

我在每个视图中使用以下代码行：

- (BOOL)shouldAutorotate
{
    return YES;
}

- (NSUInteger)supportedInterfaceOrientations
{
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
        return UIInterfaceOrientationMaskPortrait;
    } else {
        return UIInterfaceOrientationMaskAll;
    }
}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return UIInterfaceOrientationPortrait;
}

这段代码在使用UINavigationController的视图中几乎可以正常工作，但是在使用UITabBarController的视图中出现了大问题，因为似乎代码没有被调用。

- Stornu2

Answer 1

好的，我解决了，你需要继承UINavigationController和UITabBarController，下面是代码：

//cCustomNavigationController.h file

#import <UIKit/UIKit.h>

@interface cCustomNavigationController : UINavigationController <UINavigationControllerDelegate>

@end

//cCustomNavigationController.m file

#import "cCustomNavigationController.h"

@interface cCustomNavigationController ()

@end

@implementation cCustomNavigationController 

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

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

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

@end

//cCustomTabController.h file

#import <UIKit/UIKit.h>

@interface cCustomTabController : UITabBarController <UITabBarControllerDelegate>

@end

//cCustomTabController.m file

#import "cCustomTabController.h"

@interface cCustomTabController  ()

@end

@implementation cCustomTabController

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

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

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

@end

现在您只需使用这些类创建您的TabBarController或NavigationController，无论您何时需要它。

//For the UINavigationController
UINavigationController *navigationController = [[cCustomNavigationController alloc] init];

//For the UITabBarController
UITabBarController *tabController = [[cCustomTabController alloc] init];

我希望这能帮助到你们。

- Stornu2

---

哥们，你太聪明了！谢谢！ - EgorkZe

如果我正在使用故事板（Storyboard），我只需要在故事板中将视图控制器（View Controller）的自定义类设置为其子类，是这样吗？ - mrd