Question

我正在尝试将闪存卡存储模块存储到核心数据中，将各个存储卡存储到核心数据中。牌组是具有名称和自定义类别卡的数组的自定义类别，卡仅具有术语和定义。但我不断出错：

'NSInvalidArgumentException', reason: 'An NSManagedObject of class 'flashcard_.Cards' must have a valid NSEntityDescription.'

当我按下addCardPressed时出错，我不知道我要去哪里。

2019-01-05 18:00:55.196270-0600 flashcard![35177:1718243] [error] error:  Failed to load model named flashPrototype
CoreData: error:  Failed to load model named flashPrototype
2019-01-05 18:00:55.197121-0600 flashcard![35177:1718243] [error] error: No NSEntityDescriptions in any model claim the NSManagedObject subclass 'flashcard_.Cards' so +entity is confused.  Have you loaded your NSManagedObjectModel yet ?
CoreData: error: No NSEntityDescriptions in any model claim the NSManagedObject subclass 'flashcard_.Cards' so +entity is confused.  Have you loaded your NSManagedObjectModel yet ?
2019-01-05 18:00:55.197499-0600 flashcard![35177:1718243] [error] error: +[flashcard_.Cards entity] Failed to find a unique match for an NSEntityDescription to a managed object subclass
CoreData: error: +[flashcard_.Cards entity] Failed to find a unique match for an NSEntityDescription to a managed object subclass
2019-01-05 18:00:55.341425-0600 flashcard![35177:1718243] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'An NSManagedObject of class 'flashcard_.Cards' must have a valid NSEntityDescription.'

core data model

@IBAction函数addCardPressed（_发件人：任意）{

    if(termInput.text != "type term here..." && definitionInput.text != "type definition here..." && termInput.text != "" && definitionInput.text != ""){

        let cardToAdd = Cards(context: context)
            cardToAdd.term = termInput.text
            cardToAdd.definition = definitionInput.text
            cardArray.append(cardToAdd)
    }
}

@IBAction func studyPressed(_ sender: Any) {

    if(deckNameInput.text != "" && deckNameInput.text != "ex: physchology 101"){

        let deck = Decks(context: context)
        deck.cards = cardArray
        deck.name = deckNameInput.text

        ad.saveContext()
    }

快速将自定义类数据保存到核心数据中

0 个答案: