ios - 在 iOS : Navigation flow not working 中加载不同的 UINavigationController

Question

我正在开发通用应用程序，我想为 iPad 和 iPhone 加载不同的文件。

导航流程不起作用。任何帮助表示赞赏。

我正在应用程序委托(delegate)中编写如下代码，

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main"  bundle:nil];
UIViewController *viewController;

UINavigationController *navViewController;




if (IDIOM == IPAD) {
    navViewController  = [storyboard instantiateViewControllerWithIdentifier:@"ViewController_iPad"];
} else {
    navViewController  = [storyboard instantiateViewControllerWithIdentifier:@"ViewController"];
}

// self.window.rootViewController = viewController;
self.window.rootViewController = navViewController;
[self.window makeKeyAndVisible];
return YES;

Answer 1

嘿兄弟试试这个，

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];

UINavigationController *navigationController = (UINavigationController *) self.window.rootViewController;

if (IDIOM == IPAD) {
    [navigationController pushViewController:[storyboard instantiateViewControllerWithIdentifier:@"ViewController_iPad"] animated:NO];
} else {
    [navigationController pushViewController:[storyboard instantiateViewControllerWithIdentifier:@"ViewController"] animated:NO];
}

self.window.rootViewController = navigationController;
[self.window makeKeyAndVisible];
return YES;