ios CoreData Entity delete rule

ios 使用Coredata做數據存儲時,創建的相互關聯的Entity時,需要用到ship,比如TeacherEntity和StudentEntity(下文以這兩個Entity爲例)之間我們會以teacherShip和stuShip來關聯這兩個Entity 此處,我給TeacherModel創建的ship是studentShip,用以關聯StudentModel,給StudentModel創建te

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