如何在没有 App Delegate 的 plist 的情况下手动 select 初始故事板？

Question

我需要能够 select 每个布尔选择在应用程序启动时使用其初始 UIViewController 的故事板。每个情节提要都有效……根据 .plist（原始）设置。

所以我删除了应用程序 plist 中的默认初始故事板条目；并试图手动完成。

我得到的是我的设备上的黑屏。
变量 'storyboard'、'controller'、'window' 都是非零的。但是我没有屏幕。为什么？

这是代码：

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    UIColor *blissRed = [UIColor colorWithRed:228.0/255.0 green:0.0 blue:27.0/255.0 alpha:1.0];

    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    self.window.tintColor = blissRed;

    BOOL introStoryboard = YES;  // ...artificial condition for discussion.

    UIStoryboard *storyboard;
    UIViewController *controller;

    if (introStoryboard) {
        storyboard = [UIStoryboard storyboardWithName:@"Intro" bundle:nil];
        controller = [storyboard instantiateViewControllerWithIdentifier:kIntroStoryboardBeginning];
    } else {
        storyboard = [UIStoryboard storyboardWithName:@"Bliss" bundle:nil];
        controller = [storyboard instantiateViewControllerWithIdentifier:kBlissStoryboardBeginning];
    }

    [self.window setRootViewController:controller];

    return YES;
}


@end

Answer 1

我曾经遇到过这种情况。我通过做 -

解决了它

[navigationController pushViewController:controller animated:YES];

所以你需要做的是-

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    UIColor *blissRed = [UIColor colorWithRed:228.0/255.0 green:0.0 blue:27.0/255.0 alpha:1.0];
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    self.window.tintColor = blissRed;

    BOOL introStoryboard = YES;  // ...artificial condition for discussion.

    UIStoryboard *storyboard;
    UIViewController *controller;
    UINavigationController *navigationController = (UINavigationController *)self.window.rootViewController;

    if (introStoryboard) {
        storyboard = [UIStoryboard storyboardWithName:@"Intro" bundle:nil];
        controller = [storyboard instantiateViewControllerWithIdentifier:kIntroStoryboardBeginning];
} else {
        storyboard = [UIStoryboard storyboardWithName:@"Bliss" bundle:nil];
        controller = [storyboard instantiateViewControllerWithIdentifier:kBlissStoryboardBeginning];
}

   [navigationController pushViewController:controller animated:YES];

return YES;

}

Answer 2

您刚刚忘记了 return

之前的以下行

[self.window makeKeyAndVisible];

如何在没有 App Delegate 的 plist 的情况下手动 select 初始故事板？

How do I manually select an initial storyboard without the plist from the App Delegate?

objective-c

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