尝试使用前向类“NSManagedObjectModel”作为 Swift 类模型的超类
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【中文标题】尝试使用前向类“NSManagedObjectModel”作为 Swift 类模型的超类【英文标题】：Attempting to use the forward class 'NSManagedObjectModel' as superclass of Swift Class model 【发布时间】：2020-08-15 10:32:24 【问题描述】：我正在尝试为我的统一项目使用核心数据。在目标 c 项目中使用 swift 类以便于编码，所以我创建了一个桥接头
'SwiftPlugin-Swift.h' - 不可编辑的不可见头文件
// Generated by Apple Swift version 5.2.4 effective-4.1.50 (swiftlang-1103.0.32.9 clang-1103.0.32.53)
#pragma clang diagnostic push
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# include <swift/objc-prologue.h>
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#pragma clang diagnostic ignored "-Wauto-import"
#include <Foundation/Foundation.h>
#include <stdint.h>
#include <stddef.h>
#include <stdbool.h>
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typedef double swift_double3 __attribute__((__ext_vector_type__(3)));
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typedef unsigned int swift_uint4 __attribute__((__ext_vector_type__(4)));
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# define SWIFT_CLASS_PROPERTY(...)
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# define SWIFT_RUNTIME_NAME(X) __attribute__((objc_runtime_name(X)))
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# define SWIFT_RUNTIME_NAME(X)
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# define SWIFT_CLASS(SWIFT_NAME) SWIFT_RUNTIME_NAME(SWIFT_NAME) __attribute__((objc_subclassing_restricted)) SWIFT_CLASS_EXTRA
# define SWIFT_CLASS_NAMED(SWIFT_NAME) __attribute__((objc_subclassing_restricted)) SWIFT_COMPILE_NAME(SWIFT_NAME) SWIFT_CLASS_EXTRA
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# define SWIFT_CLASS(SWIFT_NAME) SWIFT_RUNTIME_NAME(SWIFT_NAME) SWIFT_CLASS_EXTRA
# define SWIFT_CLASS_NAMED(SWIFT_NAME) SWIFT_COMPILE_NAME(SWIFT_NAME) SWIFT_CLASS_EXTRA
# endif
#endif
#if !defined(SWIFT_RESILIENT_CLASS)
# if __has_attribute(objc_class_stub)
# define SWIFT_RESILIENT_CLASS(SWIFT_NAME) SWIFT_CLASS(SWIFT_NAME) __attribute__((objc_class_stub))
# define SWIFT_RESILIENT_CLASS_NAMED(SWIFT_NAME) __attribute__((objc_class_stub)) SWIFT_CLASS_NAMED(SWIFT_NAME)
# else
# define SWIFT_RESILIENT_CLASS(SWIFT_NAME) SWIFT_CLASS(SWIFT_NAME)
# define SWIFT_RESILIENT_CLASS_NAMED(SWIFT_NAME) SWIFT_CLASS_NAMED(SWIFT_NAME)
# endif
#endif
#if !defined(SWIFT_PROTOCOL)
# define SWIFT_PROTOCOL(SWIFT_NAME) SWIFT_RUNTIME_NAME(SWIFT_NAME) SWIFT_PROTOCOL_EXTRA
# define SWIFT_PROTOCOL_NAMED(SWIFT_NAME) SWIFT_COMPILE_NAME(SWIFT_NAME) SWIFT_PROTOCOL_EXTRA
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# define SWIFT_ENUM_NAMED(_type, _name, SWIFT_NAME, _extensibility) enum _name : _type _name SWIFT_COMPILE_NAME(SWIFT_NAME); enum SWIFT_COMPILE_NAME(SWIFT_NAME) SWIFT_ENUM_ATTR(_extensibility) SWIFT_ENUM_EXTRA _name : _type
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#pragma clang diagnostic ignored "-Watimport-in-framework-header"
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@import CoreData;
@import Foundation;
@import ObjectiveC;
@import UIKit;
#endif
#pragma clang diagnostic ignored "-Wproperty-attribute-mismatch"
#pragma clang diagnostic ignored "-Wduplicate-method-arg"
#if __has_warning("-Wpragma-clang-attribute")
# pragma clang diagnostic ignored "-Wpragma-clang-attribute"
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#pragma clang diagnostic ignored "-Wunknown-pragmas"
#pragma clang diagnostic ignored "-Wnullability"
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# undef any
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# pragma pop_macro("any")
#endif
@class NSEntityDescription;
@class NSManagedObjectContext;
SWIFT_CLASS("_TtC4k3us10EventModel")
@interface EventModel : NSManagedObject
- (nonnull instancetype)initWithEntity:(NSEntityDescription * _Nonnull)entity insertIntoManagedObjectContext:(NSManagedObjectContext * _Nullable)context OBJC_DESIGNATED_INITIALIZER;
@end
@interface EventModel (SWIFT_EXTENSION(k3us))
@property (nonatomic) int64_t app_id;
@property (nonatomic, copy) NSString * _Nullable app_session_id;
@property (nonatomic, copy) NSString * _Nullable app_ver;
@property (nonatomic, copy) NSString * _Nullable counter;
@property (nonatomic, copy) NSString * _Nullable date;
@property (nonatomic, copy) NSString * _Nullable device_id;
@property (nonatomic, copy) NSString * _Nullable device_info;
@property (nonatomic) int64_t event_id;
@property (nonatomic, copy) NSString * _Nullable genus;
@property (nonatomic, copy) NSString * _Nullable kingdom;
@property (nonatomic, copy, getter=module, setter=setModule:) NSString * _Nullable module_;
@property (nonatomic, copy) NSString * _Nullable network_info;
@property (nonatomic, copy) NSString * _Nullable phylum;
@property (nonatomic, copy) NSString * _Nullable priority;
@property (nonatomic, copy) NSString * _Nullable screen_session_id;
@property (nonatomic) int64_t u_event_id;
@property (nonatomic) int64_t u_ref_event_id;
@property (nonatomic) int64_t user_id;
@property (nonatomic) int64_t value2;
@end
SWIFT_CLASS("_TtC4k3us18SQLiteHelperObject")
@interface SQLiteHelperObject : NSObject
- (void)trackEventWithJson:(NSString * _Nonnull)json;
- (nonnull instancetype)init OBJC_DESIGNATED_INITIALIZER;
@end
@class UNNotificationRequest;
SWIFT_CLASS("_TtC4k3us19TNLSalesForceBridge")
@interface TNLSalesForceBridge : NSObject
SWIFT_CLASS_PROPERTY(@property (nonatomic, class, readonly, strong) TNLSalesForceBridge * _Nonnull shared;)
+ (TNLSalesForceBridge * _Nonnull)shared SWIFT_WARN_UNUSED_RESULT;
- (BOOL)setContactKeySFMCWithContactKey:(NSString * _Nonnull)contactKey SWIFT_WARN_UNUSED_RESULT;
- (void)setSFMCAttributeWithAttribute:(NSString * _Nonnull)attribute;
- (void)registerforSFMCtokenWithDeviceToken:(NSData * _Nonnull)deviceToken;
- (NSString * _Nonnull)getContactKeySFMC SWIFT_WARN_UNUSED_RESULT;
- (void)pushNotificationReceivedWithUserInfo:(NSDictionary * _Nonnull)userInfo fetchCompletionHandler:(void (^ _Nonnull)(UIBackgroundFetchResult))completionHandler;
- (void)sendPushAnalyticsWithRequst:(UNNotificationRequest * _Nonnull)requst;
- (void)setSFMCTagsWithTag:(NSString * _Nonnull)tag;
- (BOOL)configureMarketingCloudSDK SWIFT_WARN_UNUSED_RESULT;
- (nonnull instancetype)init OBJC_DESIGNATED_INITIALIZER;
@end
#if __has_attribute(external_source_symbol)
# pragma clang attribute pop
#endif
#pragma clang diagnostic pop
我猜这个头文件完全是 Xcode 生成的，但抛出异常 Attempting to use the forward class 'NSManagedObjectModel' as superclass of 'EventModel'
我已经多次清除Build文件夹并重新构建它，没有工作！。一些类似的帖子建议我可能有一个循环导入，但我无法找出问题所在，我只添加相关文件及其导入和项目层次结构的图像
我的核心数据模型命名
Unity-iPhone
代码生成设置为类别/扩展
EventModel+CoreDataClass.swift
import CoreData
public class EventModel: NSManagedObject
iosEventTracker.mm
//
// IOSEventTracker.m
// Unity-iPhone
//
// Created by ajey raj on 13/08/20.
//
#include "SwiftPlugin-Swift.h"
@interface IOSEventTracker : NSObject
@end
@implementation IOSEventTracker
class definition...
TNLSalesForce-Bridging-Header.h
//
// TNLSalesForce-Bridging-Header.h
// TNLSalesForce
//
// Created by Ansar K.A. on 07/05/20.
// Copyright © 2020 Ansar K.A. All rights reserved.
//
#ifndef TNLSalesForce_Bridging_Header_h
#define TNLSalesForce_Bridging_Header_h
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
#import "OverrideAppDelegate.h"
#import <CoreData/CoreData.h>
#endif /* TNLSalesForce_Bridging_Header_h */
OverrideAppDelegate.h
//
// OverrideAppDelegate.h
// Unity-iPhone
//
// Created by Ansar K.A. on 09/06/20.
//
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
#import <UserNotifications/UserNotifications.h>
#import <CoreData/CoreData.h>
@interface OverrideAppDelegate : NSObject
declaration methods..
@end
OverrideAppDelegate.mm
//
// OverrideAppDelegate.m
// Unity-iPhone
//
// Created by Ansar K.A. on 09/06/20.
//
#import <Foundation/Foundation.h>
#import "OverrideAppDelegate.h"
#include "SwiftPlugin-Swift.h"
#import <Firebase/Firebase.h>
@implementation OverrideAppDelegate
class methods...
@end
Override_iOS.h
//
// Copyright (c) 2017 eppz! mobile, Gergely Borbás (SP)
//
// http://www.twitter.com/_eppz
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
// PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
// CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
// OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
#import "EPPZSwizzler.h"
#import "OverrideAppDelegate.h"
@interface Override_iOS : NSObject
@end
Override_iOS.mm
#import "Override_iOS.h"
__strong Override_iOS *_instance;
@implementation Override_iOS
....
...
@end
项目层次结构
注意，这将是由统一生成的目标 c 项目，所有核心数据模型将通过后处理脚本推送到 Xcode。
【问题讨论】：
【参考方案1】：您不能将转发类用作基类（超类）。
当你有一个前向类时，你和编译器只知道有一个同名的类。这些信息不足以创建子类。编译器需要类的实际接口。
【讨论】：
我相信你的前向类是指不能用作超类的“NSManagedObject”。但是头文件 'SwiftPlugin-Swift.h' 是由 Xcode 创建和管理的，无法编辑，如果我错了或无法理解你的答案，请见谅。请解释以上是关于尝试使用前向类“NSManagedObjectModel”作为 Swift 类模型的超类的主要内容，如果未能解决你的问题，请参考以下文章
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