适用于通用iOS 6应用的程序化情节提要

Question

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This fine question and answer does not quite deal with my Universal app which had both a iPhone and iPad xibs and now wants to use a storyboard.

This is the xib based BSAppDelegate.m (before storyboard)

    #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;
    }

I have tried to insert the following code right after the else above but I cannot quite complete the code fix which needs to set self.viewController to be compatible with the above code.

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

Can you show me how to fix my code, please? I am using Xcode 4.5.2 and developing for iOS 6.

Answer 1

two issues:

1. just set self.ViewController to your vc which you get from the storyboard :)

     #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. in your storyboard, you have no identifier named 'BSViewController' set so the call instantiateViewControllerWithIdentifier will fail. set the identifier (aka the Storyboard ID) visible in your screenshot