升级到Xcode 4.5后，iOS 5 SDK消失了 [英] iOS 5 SDK is gone after upgrade to Xcode 4.5

问题描述

我将Xcode升级到4.5版。现在所有的首选项都重置为出厂设置 - 编辑器字体，颜色等 - 但这不是我最关心的问题。

I upgraded Xcode to version 4.5. Now all of the preferences are reset back to factory settings - editor fonts, colors, etc - but this is not my biggest concern.

我目标的iOS SDK 5.1现在已经不见了。在项目的构建设置中，我只能在最新iOS（iOS 6.0）和iOS 6.0之间选择Base SDK。是否有可能恢复以前安装的SDK？

It seems the iOS SDK 5.1 I was targeting is now gone. In project's build settings I can only choose Base SDK between "Latest iOS (iOS 6.0)" and "iOS 6.0". Is it possible to recover the previous installed SDKs?

推荐答案

目前的Xcode版本只附带最新的iOS SDK（遗憾的是，但我们无法改变它）。此外，Apple建议始终使用最新的SDK构建应用程序，并将部署目标设置为您计划支持的最低版本。

Current Xcode versions come only with the latest iOS SDK (which is a pity, but we cannot change it). Also Apple recommends to always use the latest SDK for building apps, and setting the "Deployment Target" to the minimum version that you plan to support.

您可以复制SDK （例如iPhoneOS5.1.sdk）从较旧的Xcode到

You can copy an SDK (e.g. iPhoneOS5.1.sdk) from an older Xcode to

/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs

它将出现在构建设置中。但是您可能会在以后使用此配置时遇到问题。

and it will appear in the build settings. But you might run into problems later with this configuration.

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