iOS 5 中的 UITabBarController 中的 UISplitViewController

Question

我在每个项目上都有一个带有 splitviewcontroller 的标签栏。我使用了该站点 https://github.com/grgcombs/IntelligentSplitViewController 的子类，并且在 iOS 4 中一切正常，但在 iOS 5 中我遇到了问题。当我以纵向模式启动应用程序，然后更改为横向并转到选项卡栏中的第二项，然后再次更改为纵向模式并单击弹出框，然后关闭弹出框，转到选项卡中的第一项，再次打开弹出框并更改为景观，主视图消失，弹出框仍然可见。有人知道如何解决吗？

Answer 1

我一直在努力解决同样的问题。我没有使用您指示的 UISplitViewController 子类，而是创建了一个 UITabBarController 子类，它将旋转消息正确地传播到它包含的所有 UISplitViewControllers。这维护了 UISplitViewControllers 的正确内部状态。但是，如果 SplitViewController 不可见，则不会调用其中一个 SplitViewController 委托方法，因此我在详细视图控制器中处理此问题。我已经确认这适用于 iOS5.0 - iOS6.1

OSTabBarController.m

#import "OSTabBarController.h"

@implementation OSTabBarController

-(void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration{
    [super willRotateToInterfaceOrientation:toInterfaceOrientation duration:duration];
    for(UIViewController *targetController in self.viewControllers){
        if(targetController != self.selectedViewController && [targetController isKindOfClass:[UISplitViewController class]]){
            [targetController willRotateToInterfaceOrientation:toInterfaceOrientation duration:duration];
        }
    }
}

-(void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation{
    [super didRotateFromInterfaceOrientation:fromInterfaceOrientation];
    for(UIViewController *targetController in self.viewControllers){
        if(targetController != self.selectedViewController && [targetController isKindOfClass:[UISplitViewController class]]){
            [targetController didRotateFromInterfaceOrientation:fromInterfaceOrientation];
        }
    }
}

@end

DetailViewController

@implementation OSDetailViewController

-(void)viewWillAppear:(BOOL)animated{
    //the splitViewController:willHideViewController:withBarButtonItem:forPopoverController: may not have been called
    if(!UIInterfaceOrientationIsPortrait(self.interfaceOrientation)){
        self.navigationItem.leftBarButtonItem = nil;
    }
}

#pragma mark - UISplitViewControllerDelegate Methods

- (void)splitViewController:(UISplitViewController *)splitController willHideViewController:(UIViewController *)viewController withBarButtonItem:(UIBarButtonItem *)barButtonItem forPopoverController:(UIPopoverController *)popoverController
{
    [self.navigationItem setLeftBarButtonItem:barButtonItem animated:YES];

}

- (void)splitViewController:(UISplitViewController *)splitController willShowViewController:(UIViewController *)viewController invalidatingBarButtonItem:(UIBarButtonItem *)barButtonItem
{
    [self.navigationItem setLeftBarButtonItem:nil animated:YES];
}

@end