我想将核心数据添加到现有的iPhone项目中,但我仍然遇到很多编译错误:
- NSManagedObjectContext undeclared
- Expected specifier-qualifier-list before 'NSManagedObjectModel'
- ...
我已经将核心数据框架添加到目标(右键单击我的项目"Targets","Add" - "Existing Frameworks","CoreData.framework").
我的头文件:
NSManagedObjectModel *managedObjectModel;
NSManagedObjectContext *managedObjectContext;
NSPersistentStoreCoordinator *persistentStoreCoordinator;
[...]
@property (nonatomic, retain, readonly) NSManagedObjectModel *managedObjectModel;
@property (nonatomic, retain, readonly) NSManagedObjectContext *managedObjectContext;
@property (nonatomic, retain, readonly) NSPersistentStoreCoordinator *persistentStoreCoordinator;
我错过了什么？开始一个新项目不是一个选择......
非常感谢!
编辑
对不起,我确实有这些实现...但似乎缺少库...实现方法已满,编译错误如" managedObjectContext undeclared"," NSPersistentStoreCoordinator undeclared",但也有"预期")'之前NSManagedObjectContext"(虽然它似乎括号是正确的)...
#pragma mark -
#pragma mark Core Data stack
/**
Returns the managed object context for the application.
If the context doesn't already exist, it is created and …