不再使用情节提要而不是 XIB 文件

Question

另一个问题：

即使使用此代码：我仍然收到

的错误

“应用程序窗口在应用程序启动结束时应该有一个根视图控制器”

    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
SliderGaloreViewController *sliderGaloreViewController = [[SliderGaloreViewController alloc] init];
self.window.rootViewController = sliderGaloreViewController;
[self.window makeKeyAndVisible];
return YES;

我现在决定使用故事板而不是许多 XIB 文件，并且我有两段代码给出了 SIGABRT 错误。您能否查看它们并指出如何修复错误。提前致谢！

更新 1： 顺便说一句，错误是：
由于未捕获的异常“NSInternalInconsistencyException”而终止应用程序，原因：“-[UIViewController _loadViewFromNibNamed:bundle:] 加载了“SliderGaloreViewController”笔尖，但未设置视图出口。'

原因 1（在 appdelegate 中）：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:     (NSDictionary *)launchOptions
{
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];

if ([prefs objectForKey:@"PuzzlePicture"] == nil) {
    [prefs setBool:FALSE forKey:@"Refresh"];
    [prefs setInteger:0 forKey:@"PuzzlePicture"];
    [prefs setBool:TRUE forKey:@"CountMoves"];
    //[prefs setBool:TRUE forKey:@"Timer"];
    [prefs setInteger:1 forKey:@"PuzzleLayoutX"];
    [prefs setInteger:1 forKey:@"PuzzleLayoutY"];
}

self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
SliderGaloreViewController *sliderGaloreViewController = [[SliderGaloreViewController   alloc] initWithNibName:@"SliderGaloreViewController" bundle:nil];
self.window.rootViewController = sliderGaloreViewController;
[self.window makeKeyAndVisible];
return YES;
}

原因 2（在 Viewcontroller.m 中）：

- (IBAction)showInfo:(id)sender
{
SliderGaloreFlipsideViewController *controller = [[SliderGaloreFlipsideViewController alloc] initWithNibName:@"SliderGaloreFlipsideViewController" bundle:nil];
controller.delegate = self;
controller.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentViewController:controller animated:YES completion:nil];
}

Answer 1

initWithNibName 不再用于故事板，完全忘记笔尖。

SliderGaloreFlipsideView 是标识符，表示您在 XCode 中设计时给出的 storyboardId/

- (BOOL)application:(UIApplication *)application
               didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];

if ([prefs objectForKey:@"PuzzlePicture"] == nil) {
    [prefs setBool:FALSE forKey:@"Refresh"];
    [prefs setInteger:0 forKey:@"PuzzlePicture"];
    [prefs setBool:TRUE forKey:@"CountMoves"];
    //[prefs setBool:TRUE forKey:@"Timer"];
    [prefs setInteger:1 forKey:@"PuzzleLayoutX"];
    [prefs setInteger:1 forKey:@"PuzzleLayoutY"];
}

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

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

SliderGaloreFlipsideViewController *sliderGaloreViewController = 
(SliderGaloreFlipsideViewController *)[storyboard 
      instantiateViewControllerWithIdentifier:@"SliderGaloreFlipsideView"];

[self.window.rootViewController presentViewController:sliderGaloreViewController 
                                             animated:NO 
                                           completion:nil];

return YES;
}

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如果您尝试设置根控制器，则删除所有代码并将其设置在情节提要中：