如何从 xcode 项目中完全删除 CoreData

Question

我正在尝试从我的应用程序中完全删除 CoreData，因为我不小心删除了模型，尽管尝试修复它，但我仍然收到：

无法使用 nil 模型创建 NSPersistentStoreCoordinator

因为我没有在这个项目中使用 CoreData，所以我决定尝试完全删除它，但我遇到了麻烦。这是我到目前为止所做的：

1. 删除了 CoreData 框架的导入语句并从项目中删除

2. 从 AppDelegate 中删除了所有 CoreData 代码

3. 在构建阶段从“复制捆绑资源”中删除了模型

4. 重新启动计算机，重新安装 xcode SDK 8.4

5. 仔细检查项目文件夹以仔细检查我是否删除了它们，而不仅仅是删除引用。

然而我仍然收到错误。任何帮助将不胜感激，因为我无法运行我的应用程序。构建阶段工作正常，但在启动时，我收到此错误：

'NSInvalidArgumentException'的，理由是： '不能用零模型创建NSPersistentStoreCoordinator'
：***第一掷调用堆栈
（0x182b8822c 0x1947fc0e4 0x1828192a0 0x1001543a4 0x100151580 0x1004a0fd4 0x1004a0f94 0x1004abdb8 0x1004a42c4 0x1004ae5d4 0x1004b0248 0x19505921c 0x195058ee0）
的libc ++ abi.dylib：与未捕获的异常终止NSException 类型

我知道它正在检测一个 nil 模型，那么如何从项目中完全删除 CoreData？

我的 AppDelegate 文件：

//
//  AppDelegate.m
//  Oingo
//
//  Created by Matthew Acalin on 4/24/15.
//  Copyright (c) 2015 Oingo Inc. All rights reserved.
//

#import "AppDelegate.h"
#import <Parse/Parse.h>
#import "PFTwitterUtils+NativeTwitter.h"
#import <ParseFacebookUtilsV4/PFFacebookUtils.h>
#import <TwitterKit/TwitterKit.h>
#import <Fabric/Fabric.h>
#import <Crashlytics/Crashlytics.h>
#import <FBSDKCoreKit/FBSDKCoreKit.h>
#import <FBSDKLoginKit/FBSDKLoginKit.h>

@interface AppDelegate ()

@end

@implementation AppDelegate

- (id)initWithCoder:(NSCoder *)aDecoder {

   [Fabric with:@[CrashlyticsKit]];

    return self;
}

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.


//    [NSThread sleepForTimeInterval:5];

    // Initialize Parse.
    [Parse enableLocalDatastore];
    [Parse setApplicationId:@"xxx"
                  clientKey:@"xxx"];
    [PFFacebookUtils initializeFacebookWithApplicationLaunchOptions:launchOptions];
    [PFTwitterUtils initializeWithConsumerKey:@"xxx" consumerSecret:@"xxxx"];

    //Initialize Twitter
    [[Twitter sharedInstance] startWithConsumerKey:@"xxxxx" consumerSecret:@"xxxx"];
    [Fabric with:@[[Twitter sharedInstance]]];
    [Fabric with:@[TwitterKit, CrashlyticsKit]];


    // [Optional] Track statistics around application opens.
    //[PFAnalytics trackAppOpenedWithLaunchOptions:launchOptions];

    //Initialize Facebook
    [FBSDKAppEvents activateApp];
    return [[FBSDKApplicationDelegate sharedInstance] application:application didFinishLaunchingWithOptions:launchOptions];
}


//Method added for facebook integration
- (BOOL)application:(UIApplication *)application
            openURL:(NSURL *)url
  sourceApplication:(NSString *)sourceApplication
         annotation:(id)annotation {
    return [[FBSDKApplicationDelegate sharedInstance] application:application
                                                          openURL:url
                                                sourceApplication:sourceApplication
                                                       annotation:annotation];
}

- (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 active 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.
    [FBSDKAppEvents activateApp];
}

- (void)applicationWillTerminate:(UIApplication *)application {
    // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
    // Saves changes in the application's managed object context before the application terminates.
//    [self saveContext];
}

//#pragma mark - Core Data stack
//
//@synthesize managedObjectContext = _managedObjectContext;
//@synthesize managedObjectModel = _managedObjectModel;
//@synthesize persistentStoreCoordinator = _persistentStoreCoordinator;
//
//- (NSURL *)applicationDocumentsDirectory {
//    // The directory the application uses to store the Core Data store file. This code uses a directory named "Oingo.Oingo" in the application's documents directory.
//    return [[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] lastObject];
//}
//
//- (NSManagedObjectModel *)managedObjectModel {
//    // The managed object model for the application. It is a fatal error for the application not to be able to find and load its model.
//    if (_managedObjectModel != nil) {
//        return _managedObjectModel;
//    }
//    NSURL *modelURL = [[NSBundle mainBundle] URLForResource:@"Oingo" withExtension:@"momd"];
//    _managedObjectModel = [[NSManagedObjectModel alloc] initWithContentsOfURL:modelURL];
//    return _managedObjectModel;
//}
//
//- (NSPersistentStoreCoordinator *)persistentStoreCoordinator {
//    // The persistent store coordinator for the application. This implementation creates and return a coordinator, having added the store for the application to it.
//    if (_persistentStoreCoordinator != nil) {
//        return _persistentStoreCoordinator;
//    }
//    
//    // Create the coordinator and store
//    
//    _persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:[self managedObjectModel]];
//    NSURL *storeURL = [[self applicationDocumentsDirectory] URLByAppendingPathComponent:@"Oingo.sqlite"];
//    NSError *error = nil;
//    NSString *failureReason = @"There was an error creating or loading the application's saved data.";
//    if (![_persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeURL options:nil error:&error]) {
//        // Report any error we got.
//        NSMutableDictionary *dict = [NSMutableDictionary dictionary];
//        dict[NSLocalizedDescriptionKey] = @"Failed to initialize the application's saved data";
//        dict[NSLocalizedFailureReasonErrorKey] = failureReason;
//        dict[NSUnderlyingErrorKey] = error;
//        error = [NSError errorWithDomain:@"YOUR_ERROR_DOMAIN" code:9999 userInfo:dict];
//        // Replace this with code to handle the error appropriately.
//        // abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
//        NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
//        abort();
//    }
//    
//    return _persistentStoreCoordinator;
//}
//
//
//- (NSManagedObjectContext *)managedObjectContext {
//    // Returns the managed object context for the application (which is already bound to the persistent store coordinator for the application.)
//    if (_managedObjectContext != nil) {
//        return _managedObjectContext;
//    }
//    
//    NSPersistentStoreCoordinator *coordinator = [self persistentStoreCoordinator];
//    if (!coordinator) {
//        return nil;
//    }
//    _managedObjectContext = [[NSManagedObjectContext alloc] init];
//    [_managedObjectContext setPersistentStoreCoordinator:coordinator];
//    return _managedObjectContext;
//}
//
//#pragma mark - Core Data Saving support
//
//- (void)saveContext {
//    NSManagedObjectContext *managedObjectContext = self.managedObjectContext;
//    if (managedObjectContext != nil) {
//        NSError *error = nil;
//        if ([managedObjectContext hasChanges] && ![managedObjectContext save:&error]) {
//            // Replace this implementation with code to handle the error appropriately.
//            // abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
//            NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
//            abort();
//        }
//    }
//}

@end

首选项/位置设置的屏幕截图：派生数据 = 相对

输出截图：