NSManagedObject是为我的“TestEntity”创建的,我能够使用“dot”语法设置其属性

最后,我会保存上下文

let entity=NSEntityDescription.insertNewObject(forEntityName: "TestEntity",into: context) as! TestEntity
entity.testAttribute="test value"
context.save()

此代码在Swift3中不起作用.当我运行它时,我得到以下运行时错误：

Could not cast value of type ‘NSManagedObject_TestEntity_’
(0x175306b0) to ‘testCoreData.TestEntity’ (0xd6bb8). 2016-06-19
11:07:52.305195 testCoreData[689:264453] Could not cast value of type
‘NSManagedObject_TestEntity_’ (0x175306b0) to
‘testCoreData.TestEntity’ (0xd6bb8)

任何人都可以了解如何在swift3中完成这项工作,好吗？任何帮助都非常感谢.
谢谢.

问题的第二部分是如何再次访问数据.以下代码以错误结束：致命错误：NSArray元素无法与Swift数组元素类型匹配

let fr:NSFetchRequest<TestEntity>=TestEntity.fetchRequest()

do {
   let searchResults=try context.fetch(fr)
   if let results=searchResults {
      for result in results {
         print("testAtt = \(result.testAtt)")
      }
   }
} catch {

}