CoreData:错误:无法在 NSManagedObject 类上调用指定的初始值设定项 [英] CoreData: error: Failed to call designated initializer on NSManagedObject class

问题描述

我对 CoreData 有一个小问题.我想插入一个新对象，所以我首先必须创建一个.这是由该代码完成的:

I have a little damn problem with CoreData. I want to insert a new Object, so I first have to create one. This is done by that code:

Challenges *newChallenge = [[Challenges alloc] init];
[newChallenge setName:@"TestChallenge"];
[newChallenge setRounds:[[NSNumber alloc] initWithInt:12]];
[newChallenge setShots:[[NSNumber alloc] initWithInt:5]];
[newChallenge setDate:[NSDate date]];

但是在 alloc init 之后我得到这个错误:

But however after the alloc init I get this error:

CoreData: error: Failed to call designated initializer on NSManagedObject class 'Challenges'

黑客出了什么问题?

推荐答案

我认为问题在于 Challenges 是一个 NSManagedObject 类，您需要指定的初始化程序:

I think the problem is that Challenges is a NSManagedObject class and you need the designated initializer:

initWithEntity:insertIntoManagedObjectContext:

代替

Challenges *newChallenge = [[Challenges alloc] init];

阅读更多..

这篇关于CoreData:错误:无法在 NSManagedObject 类上调用指定的初始值设定项的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！