为什么Xcode 9 beta不显示CoreData实体和属性的索引选项？ [英] Why Xcode 9 beta does not show index options for CoreData entities and attributes?

问题描述

在Xcode 9（beta 6）中，数据模型检查器（ .xcdatamodeld 文件）中缺少索引选项：

它们在Xcode 8中可见：

2017年WWDC 核心数据的新功能 session描述了一个新的索引API。给那个会话看看。

In Xcode 9 (beta 6) indexing options are missing in Data Model Inspector (.xcdatamodeld file):

They are visible in Xcode 8:

Do you know what reasons are behind this decision?

解决方案

Simple indexing is deprecated in iOS 11, and the Xcode 9 UI reflects that. This is from the docs for NSPropertyDesciption:

At WWDC 2017 the What's New in Core Data session described a new indexing API. Give that session a look.

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