ios - 在 Objective-C 中从 UIViewController 显示一个 SplitViewController

Question

我正在开发一个带有单个按钮的 ViewController(登录应用程序)，当我按下此按钮时，我希望我的 UISplitView 如下所示:

- (IBAction)loadSplitViewController:(id)sender {

    [self showSplitViewController];
}

为创建我的 splitViewController 而开发的代码是这样的:

-(void)showSplitViewController{

    UIStoryboard *mainStoryboard                    = [UIStoryboard storyboardWithName:@"MainStoryboard_iPad" bundle: nil];

    LeftViewController      *leftViewController     = [mainStoryboard instantiateViewControllerWithIdentifier:@"LeftViewController"];
    RightViewController     *rightViewController    = [mainStoryboard instantiateViewControllerWithIdentifier:@"RightViewController"];

    UINavigationController  *leftNavController      = [[UINavigationController alloc] initWithRootViewController:leftViewController];
    UINavigationController  *rightNavController     = [[UINavigationController alloc] initWithRootViewController:rightViewController];

    UISplitViewController   *splitViewController    = [[UISplitViewController alloc] init];
    splitViewController.viewControllers             = [NSArray arrayWithObjects:leftNavController, rightNavController, nil];

    leftViewController.delegate     = rightViewController;
    splitViewController.delegate    = rightViewController;

    [self presentViewController:splitViewController animated:YES completion:^{}];
}

问题是......如果我用于显示我的 splitViewController 这一行:

[self presentViewController:splitViewController animated:YES completion:^{}];

给我一个错误

我也试过

[self.view addSubview:splitViewController.view];

但是这样我的 splitViewController 永远不会旋转，并且委托(delegate)也不能正常工作......而且我不希望我的 splitViewController 成为我的 viewController 的 subview ，我希望它看起来更像一个独立的 modalView

任何帮助我都会感激

提前致谢

Answer 1

Split View Controller 确实应该是窗口的 Root View Controller (事实上，Apple 说它必须是，尽管似乎有一些例子证明这不是真的)。您可以将窗口的 Root View Controller 切换为 Split View Controller ，而不是呈现它。

self.view.window.rootViewController = splitViewController;