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当我实现提供的答案中建议的代码时，执行中止.

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这个很好的问题和答案并不完全适用于我的通用应用程序，它同时具有 iPhone 和 iPad xibs，现在想要使用情节提要。

这是基于 xib 的 BSAppDelegate.m（在故事板之前）

    #import "BSAppDelegate.h"
    #import "BSViewController.h"

    @implementation BSAppDelegate

    NSString *receivedData;

    - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
    {
        // Override point for customization after application launch.
        // return YES;
        self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
        // Override point for customization after application launch.
        if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
            self.viewController = [[BSViewController alloc] initWithNibName:@"BSViewController_iPhone" bundle:nil];
        } else {        
            self.viewController = [[BSViewController alloc] initWithNibName:@"BSViewController_iPad" bundle:nil];
    }
        self.window.rootViewController = self.viewController;   
        [self.window makeKeyAndVisible];
        return YES;
    }

我试图在else上面的代码之后插入以下代码，但我无法完全完成需要设置self.viewController为与上述代码兼容的代码修复。

UIStoryboard *sb = [UIStoryboard storyboardWithName:@"MainStoryboard_iPad" bundle:nil];
UIViewController *vc = [sb instantiateViewControllerWithIdentifier:@"BSViewController"];
vc.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentViewController:vc animated:YES completion:NULL];

你能告诉我如何修复我的代码吗？我正在使用 Xcode 4.5.2 并为 iOS 6 开发。

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1 回答 1

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两个问题：

  1. 只需将 self.ViewController 设置为您从情节提要中获得的 vc :)

        #import "BSAppDelegate.h"
#import "BSViewController.h"

@implementation BSAppDelegate

NSString *receivedData;

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    // Override point for customization after application launch.
    // return YES;
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
        self.viewController = [[BSViewController alloc] initWithNibName:@"BSViewController_iPhone" bundle:nil];
    } else {        
        UIStoryboard *sb = [UIStoryboard storyboardWithName:@"MainStoryboard_iPad" bundle:nil];
        UIViewController *vc = [sb instantiateViewControllerWithIdentifier:@"BSViewController"];
        vc.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
        self.viewController = (id)vc;
    }
    self.window.rootViewController = self.viewController;   
    [self.window makeKeyAndVisible];
    return YES;
}

  2. 在您的故事板中，您没有设置名为“BSViewController”的标识符，因此调用 instantiateViewControllerWithIdentifier 将失败。设置在屏幕截图中可见的标识符（又名 Storyboard ID）

于 2013-02-17T15:28:21.110 回答