在UITabBarController中强制特定视图控制器横向显示

Question

我在UITabBarController中有5个导航控制器。UITabBarController 中的一个导航控制器有一个视图控制器始终横向其他所有纵向。

-(BOOL)shouldAutorotate
{
    return [self.topViewController shouldAutorotate];
}
-(NSUInteger)supportedInterfaceOrientations
{
    return [self.topViewController supportedInterfaceOrientations];
}
- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return [self.topViewController preferredInterfaceOrientationForPresentation];
}

上面的代码我放在导航控制器子类中。

-(BOOL)shouldAutorotate
{
    return NO;
}
-(NSUInteger)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskAll;
}
- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return UIInterfaceOrientationLandscapeLeft;
}

上面的代码我放在景观控制器中。

我有 Base 作为 UIViewController 子类，因为我把这段代码放了

-(BOOL)shouldAutorotate
{
    return NO;
}
-(NSUInteger)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskAll;
}
- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    if ([self isKindOfClass:[LanscapeViewController class]])
        return UIInterfaceOrientationLandscapeLeft;
    else
        return UIInterfaceOrientationPortrait;
}

如果我呈现该视图控制器，它可以很好地显示该屏幕仅横向。但是如果我将视图控制器推入仍然在纵向中。

Answer 1

您是否在 ViewController 中为纵向模式编写以下代码。

    -(BOOL)shouldAutorotate
{
    return NO;
}
-(NSUInteger)supportedInterfaceOrientations
{
    return (UIInterfaceOrientationMaskPortrait | UIInterfaceOrientationMaskPortraitUpsideDown);
}
- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return UIInterfaceOrientationPortraitUpsideDown | UIInterfaceOrientationPortrait;
}

Answer 2

看看这篇文章。http://www.klecker.de/photo/index.php?option=com_content&task=view&id=148&Itemid=213或在横向模式下显示导航控制器不起作用 ios 6.0分别。

我确实在标签栏应用程序中这样做了，但我没有强制旋转其中一个选项卡的直接根视图，而是强制旋转其中一个子视图。我不确定这是否直接适用于选项卡栏的视图控制器之一。

Answer 3

创建一个UIViewController类别来检查当前的 ViewController，

#import <UIKit/UIKit.h>
@interface UIViewController (Utils)
+(UIViewController*) currentViewController;
@end
#import "UIViewController+Utils.h"
@implementation UIViewController (Utils)
+(UIViewController*) findBestViewController:(UIViewController*)vc {
    if (vc.presentedViewController) {
        // Return presented view controller
        return [UIViewController findBestViewController:vc.presentedViewController];
    } else if ([vc isKindOfClass:[UISplitViewController class]]) {
        // Return right hand side
        UISplitViewController* svc = (UISplitViewController*) vc;
        if (svc.viewControllers.count > 0)
            return [UIViewController findBestViewController:svc.viewControllers.lastObject];
        else
            return vc;
    } else if ([vc isKindOfClass:[UINavigationController class]]) {
        // Return top view
        UINavigationController* svc = (UINavigationController*) vc;
        if (svc.viewControllers.count > 0)
            return [UIViewController findBestViewController:svc.topViewController];
        else
            return vc;
    } else if ([vc isKindOfClass:[UITabBarController class]]) {
        // Return visible view
        UITabBarController* svc = (UITabBarController*) vc;
        if (svc.viewControllers.count > 0)
            return [UIViewController findBestViewController:svc.selectedViewController];
        else
            return vc;
    } else {
        // Unknown view controller type, return last child view controller
        return vc;
    }
}
+(UIViewController*) currentViewController {
    // Find best view controller
    UIViewController* viewController = [UIApplication sharedApplication].keyWindow.rootViewController;
    return [UIViewController findBestViewController:viewController];
}
@end

在Appdelegate.m导入UIView控制器类别上方，导入要在横向中显示的视图控制器，并将方向方法实现为

- (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window
{
    if ([[UIViewController currentViewController] isKindOfClass:[YourLandScapeViewController class]]) {
        return UIInterfaceOrientationMaskLandscape; //Orientation for LandScapeViewcontroller
    }
    return UIInterfaceOrientationMaskPortrait; // rest All ViewController
}