iPhone屏幕黑色啟動

Question

我正在開發iPhone應用程序並合並了解析。 最初是Parse.com的一個入門項目。 該文件使用xib代替情節提要； 我刪除了xib並創建了自己的情節提要，然后在info.plist文件中更改為Main storyboard文件名基礎：Main_iPhone。 然后我拖出一個視圖控制器，並設置指向該視圖控制器的小箭頭，但是當應用程序啟動時，屏幕只是黑色。 怎么了？ 這是我的ap委托代碼：

//
//  ParseStarterProjectAppDelegate.m
//  ParseStarterProject
//
//  Copyright 2014 Parse, Inc. All rights reserved.
//

#import <Parse/Parse.h>

// If you want to use any of the UI components, uncomment this line
// #import <ParseUI/ParseUI.h>

// If you are using Facebook, uncomment this line
// #import <ParseFacebookUtils/PFFacebookUtils.h>

// If you want to use Crash Reporting - uncomment this line
// #import <ParseCrashReporting/ParseCrashReporting.h>

#import "ParseStarterProjectAppDelegate.h"


@implementation ParseStarterProjectAppDelegate

#pragma mark - UIApplicationDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main"  bundle:nil];

    // Instantiate the initial view controller object from the storyboard
    //self.window.rootViewController = [storyboard instantiateInitialViewController];

    // Enable storing and querying data from Local Datastore. Remove this line if you don't want to
    // use Local Datastore features or want to use cachePolicy.
    [Parse enableLocalDatastore];

    // ****************************************************************************
    // Uncomment this line if you want to enable Crash Reporting
    // [ParseCrashReporting enable];
    //
    // Uncomment and fill in with your Parse credentials:
     [Parse setApplicationId:@"privatecrap" clientKey:@"privatecrap"];
    //
    // If you are using Facebook, uncomment and add your FacebookAppID to your bundle's plist as
    // described here: https://developers.facebook.com/docs/getting-started/facebook-sdk-for-ios/
    // [PFFacebookUtils initializeFacebook];
    // ****************************************************************************

    [PFUser enableAutomaticUser];

    PFACL *defaultACL = [PFACL ACL];

    // If you would like all objects to be private by default, remove this line.
    [defaultACL setPublicReadAccess:YES];

    [PFACL setDefaultACL:defaultACL withAccessForCurrentUser:YES];

    // Override point for customization after application launch.

    //self.window.rootViewController = self.viewController;
    //[self.window makeKeyAndVisible];

    if (application.applicationState != UIApplicationStateBackground) {
        // Track an app open here if we launch with a push, unless
        // "content_available" was used to trigger a background push (introduced in iOS 7).
        // In that case, we skip tracking here to avoid double counting the app-open.
        BOOL preBackgroundPush = ![application respondsToSelector:@selector(backgroundRefreshStatus)];
        BOOL oldPushHandlerOnly = ![self respondsToSelector:@selector(application:didReceiveRemoteNotification:fetchCompletionHandler:)];
        BOOL noPushPayload = ![launchOptions objectForKey:UIApplicationLaunchOptionsRemoteNotificationKey];
        if (preBackgroundPush || oldPushHandlerOnly || noPushPayload) {
            [PFAnalytics trackAppOpenedWithLaunchOptions:launchOptions];
        }
    }

#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 80000
    if ([application respondsToSelector:@selector(registerUserNotificationSettings:)]) {
        UIUserNotificationType userNotificationTypes = (UIUserNotificationTypeAlert |
                                                        UIUserNotificationTypeBadge |
                                                        UIUserNotificationTypeSound);
        UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:userNotificationTypes
                                                                                 categories:nil];
        [application registerUserNotificationSettings:settings];
        [application registerForRemoteNotifications];
    } else
#endif
    {
        [application registerForRemoteNotificationTypes:(UIRemoteNotificationTypeBadge |
                                                         UIRemoteNotificationTypeAlert |
                                                         UIRemoteNotificationTypeSound)];
    }



//    self.window.rootViewController=[[UIStoryboard storyboardWithName:@"Main" bundle:nil] instantiateViewControllerWithIdentifier:@"emailStoryboard"];

    return YES;
}

/*

///////////////////////////////////////////////////////////
// Uncomment this method if you are using Facebook
///////////////////////////////////////////////////////////

- (BOOL)application:(UIApplication *)application
            openURL:(NSURL *)url
  sourceApplication:(NSString *)sourceApplication
         annotation:(id)annotation {
    return [PFFacebookUtils handleOpenURL:url];
}

 */

- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)newDeviceToken {
    [PFPush storeDeviceToken:newDeviceToken];
    [PFPush subscribeToChannelInBackground:@"" target:self selector:@selector(subscribeFinished:error:)];
}

- (void)application:(UIApplication *)application didFailToRegisterForRemoteNotificationsWithError:(NSError *)error {
    if (error.code == 3010) {
        NSLog(@"Push notifications are not supported in the iOS Simulator.");
    } else {
        // show some alert or otherwise handle the failure to register.
        NSLog(@"application:didFailToRegisterForRemoteNotificationsWithError: %@", error);
    }
}

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo {
    [PFPush handlePush:userInfo];

    if (application.applicationState == UIApplicationStateInactive) {
        [PFAnalytics trackAppOpenedWithRemoteNotificationPayload:userInfo];
    }
}

///////////////////////////////////////////////////////////
// Uncomment this method if you want to use Push Notifications with Background App Refresh
///////////////////////////////////////////////////////////
/*
- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler {
    if (application.applicationState == UIApplicationStateInactive) {
        [PFAnalytics trackAppOpenedWithRemoteNotificationPayload:userInfo];
    }
}
 */

- (void)applicationWillResignActive:(UIApplication *)application {
    /*
     Sent when the application is about to move from active to inactive state.
     This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message)
     or when the user quits the application and it begins the transition to the background state.
     Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates.
     Games should use this method to pause the game.
     */
}

- (void)applicationDidEnterBackground:(UIApplication *)application {
    /*
     Use this method to release shared resources, save user data, invalidate timers, and store enough application state
     information to restore your application to its current state in case it is terminated later.
     If your application supports background execution,
     this method is called instead of applicationWillTerminate: when the user quits.
     */
}

- (void)applicationWillEnterForeground:(UIApplication *)application {
    /*
     Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
     */
}

- (void)applicationDidBecomeActive:(UIApplication *)application {
    /*
     Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
     */
}

- (void)applicationWillTerminate:(UIApplication *)application {
    /*
     Called when the application is about to terminate.
     Save data if appropriate.
     See also applicationDidEnterBackground:.
     */
}

#pragma mark - ()

- (void)subscribeFinished:(NSNumber *)result error:(NSError *)error {
    if ([result boolValue]) {
        NSLog(@"ParseStarterProject successfully subscribed to push notifications on the broadcast channel.");
    } else {
        NSLog(@"ParseStarterProject failed to subscribe to push notifications on the broadcast channel.");
    }
}

@end

Answer 1

如果單擊左側文件瀏覽器中的項目，則在“常規”下，“主界面”下是否包含情節提要的名稱？

您還說過（我認為），您的情節Main_iPhone叫做Main_iPhone ，但是您的代碼正在調用Main ，然后對情節Main_iPhone執行任何操作，或者檢查其是否nil等。

您要么需要在目標中設置主界面， viewController在didFinishLaunchingWithOptions實例化初始viewController並將其設置為窗口的rootViewController。 例如

self.window.rootViewController=[[UIStoryboard storyboardWithName:@"Main_iPhone" bundle:nil] instantiateInitialViewController];

您不需要兩者都做，只需其中之一。