iOS 加载新的故事板

问题描述

带有故事板的简单 iOS 应用程序 - StoryboardA

Simple iOS App with a storyboard - StoryboardA

当 iPad 改变方向时 - 我想加载一个新的故事板 - StoryboardB

When the iPad changes orientation - I would like to load a new storyboard - StoryboardB

我把那个逻辑放在哪里.

Where do I put that logic.

当横向(及其导航)的 UI 与纵向的 UI 不同时，这是一个好的做法吗.

Is this a good practice when the UI in landscape (and it's navigation) is different than in portrait.

推荐答案

您可以通过以下方式注册UIDeviceOrientationDidChangeNotification

You can register for UIDeviceOrientationDidChangeNotification in following way

[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
[[NSNotificationCenter defaultCenter] addObserver:self
                             selector:@selector(orientationChanged:)
                             name:UIDeviceOrientationDidChangeNotification
                             object:nil];

在收到上述 UIDeviceOrientationDidChangeNotification 的通知后，您的orientationChanged: 方法将被触发，您可以在其中实现您想要实现的任何布局更改，如下所示:-

and on being notified of above mentioned UIDeviceOrientationDidChangeNotification, your orientationChanged: method will get fired, in which you can implement whatever layout changes you want to implement as follows:-

在您的私有界面 isShowingLandscapeView 中创建一个 BOOL 标志，以跟踪当前设备处于哪个方向并采取相应的行动

Create a BOOL flag in your private interface, isShowingLandscapeView, to keep track of which orientation currently device is on and act accordingly

BOOL isShowingLandscapeView = NO;

- (void)orientationChanged:(NSNotification *)notification
{
    UIDeviceOrientation deviceOrientation = [UIDevice currentDevice].orientation;
    if (UIDeviceOrientationIsLandscape(deviceOrientation) &&
        !isShowingLandscapeView)
    {
        // Changes pertaining to lanscape orientation here
        isShowingLandscapeView = YES;
    }
    else if (UIDeviceOrientationIsPortrait(deviceOrientation) &&
         isShowingLandscapeView)
    {
        // Changes pertaining to portrait orientation here
        isShowingLandscapeView = NO;
    }
}

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