我的核心数据模型中有一个实体,如下所示:
@interface Selection : NSManagedObject
@property (nonatomic, retain) NSString * book_id;
@property (nonatomic, retain) NSString * contenu;
@property (nonatomic, retain) NSNumber * page_id;
@property (nonatomic, retain) NSNumber * nbrOfOccurences;
@property (nonatomic, retain) NSString * next;
@property (nonatomic, retain) NSString * previous;
我已经创建了许多Selection
s 并将它们保存在 Core Data 中,现在我想删除一些带有某些标准的选择。Selection
例如,如果匹配以下内容 ,我想删除一个对象:
content = test
page_id = 5
book_id = 1331313
我怎么能做到这一点?