CoreData'創建NSManagedObject子類...'將生成很多方法供您使用來操作您的有序集。或者你也可以用Codegen做同樣的事情。
目標C
@interface MyObject (CoreDataGeneratedAccessors)
- (void)insertObject:(NSManagedObject *)value inItemsAtIndex:(NSUInteger)idx;
- (void)removeObjectFromItemsAtIndex:(NSUInteger)idx;
- (void)insertItems:(NSArray<NSManagedObject *> *)value atIndexes:(NSIndexSet *)indexes;
- (void)removeItemsAtIndexes:(NSIndexSet *)indexes;
- (void)replaceObjectInItemsAtIndex:(NSUInteger)idx withObject:(NSManagedObject *)value;
- (void)replaceItemsAtIndexes:(NSIndexSet *)indexes withItems:(NSArray<NSManagedObject *> *)values;
- (void)addItemsObject:(NSManagedObject *)value;
- (void)removeItemsObject:(NSManagedObject *)value;
- (void)addItems:(NSOrderedSet<NSManagedObject *> *)values;
- (void)removeItems:(NSOrderedSet<NSManagedObject *> *)values;
@end
斯威夫特
// MARK: Generated accessors for items
extension MyObject {
@objc(insertObject:inItemsAtIndex:)
@NSManaged public func insertIntoItems(_ value: NSManagedObject, at idx: Int)
@objc(removeObjectFromItemsAtIndex:)
@NSManaged public func removeFromItems(at idx: Int)
@objc(insertItems:atIndexes:)
@NSManaged public func insertIntoItems(_ values: [NSManagedObject], at indexes: NSIndexSet)
@objc(removeItemsAtIndexes:)
@NSManaged public func removeFromItems(at indexes: NSIndexSet)
@objc(replaceObjectInItemsAtIndex:withObject:)
@NSManaged public func replaceItems(at idx: Int, with value: NSManagedObject)
@objc(replaceItemsAtIndexes:withItems:)
@NSManaged public func replaceItems(at indexes: NSIndexSet, with values: [NSManagedObject])
@objc(addItemsObject:)
@NSManaged public func addToItems(_ value: NSManagedObject)
@objc(removeItemsObject:)
@NSManaged public func removeFromItems(_ value: NSManagedObject)
@objc(addItems:)
@NSManaged public func addToItems(_ values: NSOrderedSet)
@objc(removeItems:)
@NSManaged public func removeFromItems(_ values: NSOrderedSet)
}
否則肯定的只是做一個可變的副本,必要時操作,然後將它放回NSManagedObject。順便說一句,你不需要將其轉換回非可變集合要麼
請你說清楚這些方法生成在哪裏?他們似乎不適合我的屬性。我使用的是Swift,屬性聲明如下: 'code' @ NSManaged var elements:NSOrderedSet? 如果我開始輸入以下內容,它不會自動完成: elements.insert – Duzmac
它們將在swift中命名不同,核心數據將生成YourClass + CoreDataProperties.swift它們將在那裏 – trapper
Class + CoreDataProperties.swift已經生成的只有屬性。沒有辦法。我正在使用iOS btw。 – Duzmac