如何从 Core Data 中删除所有对象 [英] how to remove all objects from Core Data

问题描述

如何删除所有对象?我知道我可以通过

how can I remove all objects? I know I can remove one by

[managedObjectContext deleteObject:objToDelete];

是否可以在不迭代所有数组的情况下删除所有内容?谢谢

is it possible to delete all without iterating all array? thanks

推荐答案

标记要删除的对象然后保存的工作方式是这样的，因为 Core Data 仍然需要为所有被删除的对象运行验证规则.毕竟，一个对象可以根据它如何响应 -validateForDelete: 来拒绝删除.

Marking objects for deletion and then saving works the way it does because Core Data still needs to run the validation rules for all of the objects being deleted. After all, an object can refuse deletion based on how it responds to -validateForDelete:.

如果:

• 您确实想删除持久存储中的所有内容
• 和您不关心该持久存储中的对象是否表明它们可用于删除

• you truly want to delete everything in a persistent store
• and you don't care about whether the objects in that persistent store say they're valid for deletion

那么:

• 拆除使用该持久存储的 Core Data 堆栈
• 并删除持久存储的文件.

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