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我有一种方法可以帮助我将新对象保存到存储中:

 try! db.operation { (context, save) -> Void in
      let object: Device = try! context.new()

      object.address = self.tempDevice.address

      try! context.insert(object)
      save()
    }

但是我怎样才能修改Device我已经使用SugarRecord

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