是否可以在较旧的Xcode上编译最新的Swift版本? [英] Is it possible to compile Latest Swift version on older Xcode?

问题描述

例如，我会使用Swift 4.2，但是我不想使用Xcode 10 beta 版本，我拥有Xcode 9.4.1.

For instance, I would play around Swift 4.2, but I don't want to use Xcode 10 beta version, I have Xcode 9.4.1.

我想知道是否有办法，有可能吗?

I wonder if there is any way do it, is it possible?

推荐答案

我发现是是可能的.您可以通过安装最新的 Snapshot

I figured it out that Yes it is possible. You can achieve it by installing the latest Snapshot:

开发快照是自动生成的预编译二进制文件 由主线开发分支创建.

Development Snapshots are prebuilt binaries that are automatically created from mainline development branches.

_{https://swift.org/download/#snapshots}

快照是一个工具链，您可以将其安装到包含最新编译器的Xcode中，从而使您能够在最新工具上构建应用.

Snapshot is a toolchain that you can install into Xcode which contains the latest compiler, leading to let you able to build your app on the latest tools.

如何在Xcode中设置快照?

1-从 Swift网站下载最新的快照(Xcode).

1- Download the latest snapshot (Xcode) from Swift website.

2-安装下载的快照 .pkg 文件.

2- Install the downloaded snapshot .pkg file.

3-运行Xcode，然后转到:Xcode->工具链->管理工具链.

3- Run Xcode and then go to: Xcode -> Toolchains -> Manage toolchains.

4-选择组件"-工具链"选项后，您应该看到:

4- After selecting "Components" - "Toolchains" options, you should see:

选择"Swift开发人员快照"即可.完成上述步骤后，您可能需要重置Xcode.

Select "Swift Developer Snapshot" and thats it! You might need to reset Xcode after doing the above steps.

提醒:您应该在完成Swift 4的播放后重新选择"Xcode 8.3.3"选项，如快速-使用下载部分:

Reminder: You should reselect "Xcode 8.3.3" option after done playing around Swift 4, as mentioned in Swift - Using Downloads section:

要提交到App Store，您必须使用以下版本构建应用 Xcode中包含的Swift版本.

To submit to the App Store you must build your app using the version of Swift that comes included within Xcode.

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