blocks|key|2741291|text|sudo+xcode-select+-switch+/Applications/Xcode.app/Contents/Developer|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|2741292|然后，您可以执行以下操作之一：|unstyled|2741293|xcrun+swift+
lldb+--repl|2741294|从Xcode6.1开始，在终端中输入swift也会启动REPL。|offset|length|style|CODE|2741295|entityMap^0|0|0|0|I|5|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|R|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$B|C]]|$1|I|3|J|5|F|7|T|8|@$K|U|L|V|M|N]]|9|@]|A|$]]|$1|O|3|-4|5|F|7|W|8|@]|9|@]|A|$]]]|P|$]]

<pre><code>sudo xcode-select -switch /Applications/Xcode.app/Contents/Developer
</code></pre>

then you can do one of these: 

<pre><code>xcrun swift 
lldb --repl
</code></pre>

As of Xcode 6.1 - typing <code>swift</code> in the terminal launches the REPL as well.

blocks|key|155972|text|或者，如果你不想弄乱你当前的开发环境，你可以直接运行：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|155973|/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift|code-block|syntax|javascript|155974|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Alternatively, if you don't want to mess up your current dev environment, you can just run:

<pre><code>/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift
</code></pre>

blocks|key|154741|text|步骤1:打开终端|type|unstyled|depth|inlineStyleRanges|entityRanges|data|154742|第二步:输入"swift“|154743|第三步:没有第三步|154744|示例：|154745|GoldCoast:~+macmark$+swift
Welcome+to+Swift!++Type+:help+for+assistance.
++1>+println("Hello,+world")
Hello,+world
++2>+var+myVariable+=+42
myVariable:+Int+=+42
++3>+myVariable+=+50
++4>+let+myConstant+=+42
myConstant:+Int+=+42
++5>+println(myVariable)
50
++6>+let+label+=+"The+width+is+"
label:+String+=+"The+width+is+"
++7>+let+width+=+94
width:+Int+=+94
++8>+let+widthLabel+=+label+%2B+String(width)
widthLabel:+String+=+"The+width+is+94"
++9>+:exit

GoldCoast:~+macmark$+|code-block|syntax|javascript|154746|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|Q|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|R|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|S|8|@]|9|@]|A|$K|L]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

Step 1: Open Terminal 
Step 2: Type "swift" 
Step 3: There's no step 3 

Example:

<pre><code>GoldCoast:~ macmark$ swift
Welcome to Swift! Type :help for assistance.
 1&gt; println("Hello, world")
Hello, world
 2&gt; var myVariable = 42
myVariable: Int = 42
 3&gt; myVariable = 50
 4&gt; let myConstant = 42
myConstant: Int = 42
 5&gt; println(myVariable)
50
 6&gt; let label = "The width is "
label: String = "The width is "
 7&gt; let width = 94
width: Int = 94
 8&gt; let widthLabel = label + String(width)
widthLabel: String = "The width is 94"
 9&gt; :exit

GoldCoast:~ macmark$ 
</code></pre>

blocks|key|156143|text|在安装了命令行工具的Xcode6.1.1中，您可以通过以下方式直接引用/usr/bin/swift来执行脚本：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|156144|#!/usr/bin/swift

let+variable:+String+=+"string"
print("Test+\(variable)")|code-block|syntax|javascript|156145|entityMap^0|Z|E|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

In Xcode 6.1.1 with Command Line Tools installed you can execute scripts by referencing directly to <code>/usr/bin/swift</code> the following way:

<pre><code>#!/usr/bin/swift

let variable: String = "string"
print("Test \(variable)")
</code></pre>

blocks|key|154728|text|与从终端运行Swift的方式相同，您也可以执行脚本。只需使用下面的shebang命令，然后运行您的脚本。(Swift的创建者As+per+Chris+Lattner)|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|154729|#!/usr/bin/env+xcrun+swift+-i|code-block|syntax|javascript|154730|entityMap|0|LINK|mutability|MUTABLE|url|https://twitter.com/clattner_llvm/status/474593140511211520^0|1Q|K|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

In the same fashion as running Swift from the Terminal, you can also execute scripts.
Just use the following shebang, and run your script. (<a href="https://twitter.com/clattner_llvm/status/474593140511211520">As per Chris Lattner</a>, creator of Swift)

<pre><code>#!/usr/bin/env xcrun swift -i
</code></pre>

blocks|key|153511|text|如果有人关心一个简单的Swift脚本shebang：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|153512|#!/usr/bin/env+xcrun+--sdk+macosx+swift|code-block|syntax|javascript|153513|153514|如果需要特定的目标版本|153515|#!/usr/bin/env+xcrun+--sdk+macosx+swift+-target+x86_64-macosx10.11|153516|153517|如果需要特定的工具链(比如您想使用Swift+2.3，但您使用的是Xcode+8)|153518|#!/usr/bin/env+xcrun+--toolchain+com.apple.dt.toolchain.Swift_2_3+--sdk+macosx+swift+-target+x86_64-macosx10.11|153519|153520|如果您想在Xcode7.3.1中使用SWIFT2.2，让我们假设Xcode7.3.1位于/Applications/Xcode7.app|offset|length|style|CODE|153521|sudo+xcode-select+-s+/Applications/Xcode7.app/
xcrun+--sdk+macosx+swift|153522|从现在开始，默认的active+developer目录已更改，您可以使用以下命令进行检查：|153523|xcode-select+-p|153524|153525|如果你想使用Swift.org提供的快照，你不应该错过Installation+here。|153526|153527|正如我在Run+swift+script+from+Xcode+iOS+project+as+build+phase中首先回答的|153528|entityMap|0|LINK|mutability|MUTABLE|url|https://swift.org/download|1|https://swift.org/download/#using-downloads|2|https://stackoverflow.com/questions/30981724/run-swift-script-from-xcode-ios-project-as-build-phase/36248410#36248410^0|0|0|0|0|0|0|0|0|0|18|O|0|0|0|0|0|6|9|0|R|H|1|0|0|4|1I|2|0^^$0|@$1|2|3|4|5|6|7|1L|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|1M|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|1N|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|1O|8|@]|9|@]|A|$]]|$1|J|3|K|5|D|7|1P|8|@]|9|@]|A|$E|F]]|$1|L|3|-4|5|6|7|1Q|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|1R|8|@]|9|@]|A|$]]|$1|O|3|P|5|D|7|1S|8|@]|9|@]|A|$E|F]]|$1|Q|3|-4|5|6|7|1T|8|@]|9|@]|A|$]]|$1|R|3|S|5|6|7|1U|8|@$T|1V|U|1W|V|W]]|9|@]|A|$]]|$1|X|3|Y|5|D|7|1X|8|@]|9|@]|A|$E|F]]|$1|Z|3|10|5|6|7|1Y|8|@]|9|@]|A|$]]|$1|11|3|12|5|D|7|1Z|8|@]|9|@]|A|$E|F]]|$1|13|3|-4|5|6|7|20|8|@]|9|@]|A|$]]|$1|14|3|15|5|6|7|21|8|@]|9|@$T|22|U|23|1|24]|$T|25|U|26|1|27]]|A|$]]|$1|16|3|-4|5|6|7|28|8|@]|9|@]|A|$]]|$1|17|3|18|5|6|7|29|8|@]|9|@$T|2A|U|2B|1|2C]]|A|$]]|$1|19|3|-4|5|6|7|2D|8|@]|9|@]|A|$]]]|1A|$1B|$5|1C|1D|1E|A|$1F|1G]]|1H|$5|1C|1D|1E|A|$1F|1I]]|1J|$5|1C|1D|1E|A|$1F|1K]]]]

If any one cares a simple Swift script shebang:

<pre><code>#!/usr/bin/env xcrun --sdk macosx swift
</code></pre>

<hr>

If specific target version is required

<pre><code>#!/usr/bin/env xcrun --sdk macosx swift -target x86_64-macosx10.11
</code></pre>

<hr>

If specific toolchain is required (like you want to use Swift 2.3 but you are using Xcode 8)

<pre><code>#!/usr/bin/env xcrun --toolchain com.apple.dt.toolchain.Swift_2_3 --sdk macosx swift -target x86_64-macosx10.11
</code></pre>

<hr>

If you want to use Swift 2.2 in your Xcode 7.3.1, let's assume Xcode 7.3.1 is located at <code>/Applications/Xcode7.app</code>

<pre><code>sudo xcode-select -s /Applications/Xcode7.app/
xcrun --sdk macosx swift
</code></pre>

from now on the default active developer directory changed, you can check that using:

<pre><code>xcode-select -p
</code></pre>

<hr>

If you want to use snapshots provided by <a href="https://swift.org/download" rel="nofollow noreferrer">Swift.org</a>, you should not miss <a href="https://swift.org/download/#using-downloads" rel="nofollow noreferrer">Installation here</a>.

<hr>

as first answered by me in <a href="https://stackoverflow.com/questions/30981724/run-swift-script-from-xcode-ios-project-as-build-phase/36248410#36248410">Run swift script from Xcode iOS project as build phase</a>

blocks|key|2954141|text|**从xcode6测试版4开始更新**|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2954142|这也可以在xcode首选项上完成。只需转到xcode+->首选项->位置即可。|2954143|对于命令行工具，只需从下拉列表选项中选择您想要的版本，请参阅下图。(swift要求path为xcode6的path)。|2954144|​|2954145|📷|atomic|offset|length|2954146|2954147|我也会在下面留下我之前的答案。|2954148|2954149|Kaan说的话，你也可以使用一个苹果脚本来制作简单的应用程序，这样你就可以用它来回切换。|2954150|打开苹果脚本，将其粘贴到代码下面，并将其导出为应用程序，这样只需单击一下，您就可以切换到默认路径或beta路径(使用swift)|2954151|set+xcode6Path+to+"xcode-select+-switch+/Applications/Xcode6-Beta.app/Contents/Developer"
set+xcodeDefaultPath+to+"xcode-select+-switch+/Applications/Xcode.app/Contents/Developer"

display+dialog+"set+xcode+sdk+path+to+"+buttons+{"xcode+6",+"default"}+default+button+1
copy+result+as+list+to+{buttonPressed}
if+buttonPressed+is+"default"+then
++++try
++++++++do+shell+script+xcodeDefaultPath+with+administrator+privileges
++++end+try
else
++++try
++++++++do+shell+script+xcode6Path+with+administrator+privileges
++++end+try
end+if|code-block|syntax|javascript|2954152|然后运行>+xcrun+swift|style|CODE|2954153|免责声明|BOLD|2954154|2954155|脚本假设您同时安装了xcode6-beta和xcode5。|ordered-list-item|2954156|如果你是一个尝试only+xcode6beta的新开发人员，你不需要任何脚本或手动设置路径。只需运行xcrun+swift，因为已经为您设置了路径。|2954157|当xcode6最终发布时，您需要将路径从这个简单的应用程序重置回default，并且再也不使用它。|2954158|2954159|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/e8782a5373e2a8f91ab4a1279b5216df.png|imageAlt^0|0|0|0|0|0|1|0|0|0|0|0|0|0|0|6|B|0|0|4|0|0|0|8|4|1E|B|0|W|7|0|0^^$0|@$1|2|3|4|5|6|7|1O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1P|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|1Q|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|1R|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|1S|8|@]|9|@$K|1T|L|1U|1|1V]]|A|$]]|$1|M|3|G|5|6|7|1W|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|1X|8|@]|9|@]|A|$]]|$1|P|3|-4|5|6|7|1Y|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1Z|8|@]|9|@]|A|$]]|$1|S|3|T|5|6|7|20|8|@]|9|@]|A|$]]|$1|U|3|V|5|W|7|21|8|@]|9|@]|A|$X|Y]]|$1|Z|3|10|5|6|7|22|8|@$K|23|L|24|11|12]]|9|@]|A|$]]|$1|13|3|14|5|6|7|25|8|@$K|26|L|27|11|15]]|9|@]|A|$]]|$1|16|3|-4|5|6|7|28|8|@]|9|@]|A|$]]|$1|17|3|18|5|19|7|29|8|@]|9|@]|A|$]]|$1|1A|3|1B|5|19|7|2A|8|@$K|2B|L|2C|11|15]|$K|2D|L|2E|11|12]]|9|@]|A|$]]|$1|1C|3|1D|5|19|7|2F|8|@$K|2G|L|2H|11|15]]|9|@]|A|$]]|$1|1E|3|-4|5|6|7|2I|8|@]|9|@]|A|$]]|$1|1F|3|-4|5|6|7|2J|8|@]|9|@]|A|$]]]|1G|$1H|$5|1I|1J|1K|A|$1L|1M|1N|-4]]]]

** update as of xcode6 beta 4 **

this can also be done on xcode preferences. simply go to xcode -> preferences -> locations. 

for command line tools simply select the version you want from drop down list options, refer picture below. (swift requires path to be xcode6's path). 

<img src="https://i.stack.imgur.com/PaeBr.png" alt="command line tools screen">

I will leave my previous answer below as well. 

<hr>

what Kaan said and you can also use an apple script to make simple application so you can use it to switch back and forth.

open apple script > paste this below code &amp; export it as an application so with just one click you can switch to default path or beta path (to use swift)

<pre><code>set xcode6Path to "xcode-select -switch /Applications/Xcode6-Beta.app/Contents/Developer"
set xcodeDefaultPath to "xcode-select -switch /Applications/Xcode.app/Contents/Developer"

display dialog "set xcode sdk path to " buttons {"xcode 6", "default"} default button 1
copy result as list to {buttonPressed}
if buttonPressed is "default" then
 try
 do shell script xcodeDefaultPath with administrator privileges
 end try
else
 try
 do shell script xcode6Path with administrator privileges
 end try
end if
</code></pre>

then run > <code>xcrun swift</code> 

disclaimer

<ol>
<li>the script assumes you have both xcode6-beta &amp; xcode5 installed. </li>
<li>if you're a new developer who's trying out only xcode6beta you will not need any script or setting path manually. simply run <code>xcrun swift</code> as the path is already set for you. </li>
<li>when xcode6 is finally released you will need to reset your path back to default from this simple app and never use it again. </li>
</ol>

blocks|key|156139|text|在安装了官方的Xcode6.1版本之后，/usr/bin/swift中有一个swift命令。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|156140|请记住，如果路径中有一个与Apple提供的Python不同的Python，swift可能会失败，并返回ImportError:+No+module+named+site。在这种情况下，请确保在调用swift之前执行export+PATH=/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/sbin。|156141|entityMap^0|K|E|12|5|0|11|5|1F|X|2Q|5|2Z|20|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]|$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]|$9|T|A|U|B|C]|$9|V|A|W|B|C]]|D|@]|E|$]]|$1|H|3|-4|5|6|7|X|8|@]|D|@]|E|$]]]|I|$]]

After installing the official Xcode 6.1 release, there is a <code>swift</code> command in <code>/usr/bin/swift</code>.

Bear in mind that if you have a Python different from the Apple-supplied Python in the path, <code>swift</code> can fail with <code>ImportError: No module named site</code>. In that case, make sure that you do <code>export PATH=/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/sbin</code> before calling <code>swift</code>.

blocks|key|156039|text|xcrun命令将使用DEVELOPER_DIR环境变量覆盖当前选择的Xcode安装(使用xcode-select设置)。您可以使用它来构造一个命令，该命令将在命令行上运行swift并将您放入REPL中。它看起来像这样：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|156040|/usr/bin/env+DEVELOPER_DIR=/Applications/Xcode6-Beta.app/Contents/Developer+xcrun+swift+|code-block|syntax|javascript|156041|你可以将其命名为“swift”：|156042|alias+swift="/usr/bin/env+DEVELOPER_DIR=/Applications/Xcode6-Beta.app/Contents/Developer+xcrun+swift"|156043|有趣的是，您可以使用相同类型的调用来运行swift脚本，就像使用bash或python一样，只需添加一个-i：|156044|#!/usr/bin/env+DEVELOPER_DIR=/Applications/Xcode6-Beta.app/Contents/Developer+xcrun+swift+-i

println("Hello+World!")|156045|当然，一旦Xcode6正式发布，并且您切换到它作为默认的开发工具，您就可以放弃DEVELOPER_DIR=。比特，只需使用"xcrun+swift“。|156046|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|W|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|Y|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

The xcrun command will use the DEVELOPER_DIR environment variable to override the currently selected Xcode installation (as set with xcode-select). You can use that to construct a single command that'll run swift on the command line and put you in the REPL. That looks like this:

<pre><code>/usr/bin/env DEVELOPER_DIR=/Applications/Xcode6-Beta.app/Contents/Developer xcrun swift 
</code></pre>

and you can alias that to just 'swift':

<pre><code>alias swift="/usr/bin/env DEVELOPER_DIR=/Applications/Xcode6-Beta.app/Contents/Developer xcrun swift"
</code></pre>

As an interesting side note, you can use the same kind of invocation to run a swift script just like you'd use bash or python by adding a -i:

<pre><code>#!/usr/bin/env DEVELOPER_DIR=/Applications/Xcode6-Beta.app/Contents/Developer xcrun swift -i

println("Hello World!")
</code></pre>

Of course, once Xcode 6 is released officially and you switch to that as your default developer tools, you can drop the DEVELOPER_DIR=.. bits and just use "xcrun swift".

blocks|key|156116|text|请确保安装了xcode+6.0，但未安装6.1|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|156117|如果你得到一个错误：|156118|<unknown>:0:+error:+the+SDK+'MacOSX10.9.sdk'+does+not+support+Swift|code-block|syntax|javascript|156119|快跑吧|156120|xcrun+--sdk+iphonesimulator8.0+swift|156121|或者你也可以|156122|export+SDKROOT="iphonesimulator8.0"+|156123|然后|156124|xcrun+swift|156125|使用"xcodebuild+-showsdks“可以列出可用的SDK名称。|CODE|156126|如果安装Xcode6.1，只需|156127|sudo+xcode-select+-s+/Applications/*your-Xcode-6.1-path.app*/Contents/Developer
xcrun+swift|156128|entityMap^0|6|9|K|3|0|0|0|0|0|0|0|0|0|3|K|0|4|8|0|0^^$0|@$1|2|3|4|5|6|7|17|8|@$9|18|A|19|B|C]|$9|1A|A|1B|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|1C|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|1D|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|1E|8|@]|D|@]|E|$]]|$1|O|3|P|5|J|7|1F|8|@]|D|@]|E|$K|L]]|$1|Q|3|R|5|6|7|1G|8|@]|D|@]|E|$]]|$1|S|3|T|5|J|7|1H|8|@]|D|@]|E|$K|L]]|$1|U|3|V|5|6|7|1I|8|@]|D|@]|E|$]]|$1|W|3|X|5|J|7|1J|8|@]|D|@]|E|$K|L]]|$1|Y|3|Z|5|6|7|1K|8|@$9|1L|A|1M|B|10]]|D|@]|E|$]]|$1|11|3|12|5|6|7|1N|8|@$9|1O|A|1P|B|C]]|D|@]|E|$]]|$1|13|3|14|5|J|7|1Q|8|@]|D|@]|E|$K|L]]|$1|15|3|-4|5|6|7|1R|8|@]|D|@]|E|$]]]|16|$]]

make sure you install xcode 6.0 ,but not 6.1

If you get an error:

<pre><code>&lt;unknown&gt;:0: error: the SDK 'MacOSX10.9.sdk' does not support Swift
</code></pre>

just run 

<pre><code>xcrun --sdk iphonesimulator8.0 swift
</code></pre>

or you can 

<pre><code>export SDKROOT="iphonesimulator8.0" 
</code></pre>

and then

<pre><code>xcrun swift
</code></pre>

Use "<code>xcodebuild -showsdks</code>" to list the available SDK names.

if you install xcode 6.1,just

<pre><code>sudo xcode-select -s /Applications/*your-Xcode-6.1-path.app*/Contents/Developer
xcrun swift
</code></pre>

blocks|key|154803|text|对于XCode6，请运行以下命令：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|154804|$+sudo+xcode-select+-s+/Applications/Xcode.app/Contents/Developer/

$+xcrun+swift|code-block|syntax|javascript|154805|如果你得到一个错误：|154806|<unknown>:0:+error:+the+SDK+'MacOSX10.9.sdk'+does+not+support+Swift|154807|尝试：|154808|xcrun+swift+-sdk+/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk|154809|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

For XCode6, run these commands:

<pre><code>$ sudo xcode-select -s /Applications/Xcode.app/Contents/Developer/

$ xcrun swift
</code></pre>

If you get an error:

<pre><code>&lt;unknown&gt;:0: error: the SDK 'MacOSX10.9.sdk' does not support Swift
</code></pre>

try:

<pre><code>xcrun swift -sdk /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk
</code></pre>

blocks|key|2741497|text|打开终端，|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2741498|$sudo+xcode-select+-switch+/Applications/Xcode6-Beta6.app/Contents/Developer|offset|length|style|CODE|2741499|注意事项：应将Xcode6-Beta6.app替换为您安装的相应版本|BOLD|2741500|然后将此行alias+swift='xcrun+swift'放到~/.bash_profile|2741501|和,|2741502|$source+~/.bash_profile|2741503|$swift|2741504|就是这样！|2741505|entityMap^0|0|1|23|0|0|5|7|G|0|5|P|W|F|0|0|1|M|0|1|5|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@$D|Y|E|Z|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|10|8|@$D|11|E|12|F|J]|$D|13|E|14|F|G]]|9|@]|A|$]]|$1|K|3|L|5|6|7|15|8|@$D|16|E|17|F|G]|$D|18|E|19|F|G]]|9|@]|A|$]]|$1|M|3|N|5|6|7|1A|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|1B|8|@$D|1C|E|1D|F|G]]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1E|8|@$D|1F|E|1G|F|G]]|9|@]|A|$]]|$1|S|3|T|5|6|7|1H|8|@]|9|@]|A|$]]|$1|U|3|-4|5|6|7|1I|8|@]|9|@]|A|$]]]|V|$]]

open Terminal,

$<code>sudo xcode-select -switch /Applications/Xcode6-Beta6.app/Contents/Developer</code>

Notice: The <code>Xcode6-Beta6.app</code> should be replaced to appropriate version you installed

Then put this line <code>alias swift='xcrun swift'</code> to <code>~/.bash_profile</code>

And,

$<code>source ~/.bash_profile</code>

$<code>swift</code>

There you go!

blocks|key|154861|text|借助Swift+REPL(Read+Eval+Print+Loop)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|154862|熟悉解释型语言的开发人员在这个命令行环境中会感到很舒服，即使是经验丰富的开发人员也会发现一些独特的特性|154863|启动Terminal.app并键入swift，然后按enter键。然后你就可以进入Swift+REPL了。|154864|++++++++1>+print("Hello+Swift+REPL")
+++++Hello+Swift+REPL
++++++++2>+10+%2B+20
+++++$R0:+Int+=+30
++++++++3>+var+name+=+"Yogendra+Singh"
+++++name:+String+=+"Yogendra+Singh"
++++++++4>+print(name)
+++++Yogendra+Singh
++++++++5>|code-block|syntax|javascript|154865|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|O|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|P|8|@]|9|@]|A|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

With the help of Swift REPL(Read Eval Print Loop).

Developers familiar with interpreted languages will feel comfortable in this command-line environment, and even experienced developers will find a few unique features

Launch Terminal.app and type swift and press enter. You’ll then be in the Swift REPL.

<pre><code> 1&gt; print("Hello Swift REPL")
 Hello Swift REPL
 2&gt; 10 + 20
 $R0: Int = 30
 3&gt; var name = "Yogendra Singh"
 name: String = "Yogendra Singh"
 4&gt; print(name)
 Yogendra Singh
 5&gt;
</code></pre>

I read <a href="https://developer.apple.com/xcode/" rel="noreferrer">What's new in Xcode 6</a>. The article introduces some new feature about Xcode 6, and it says:
<blockquote>
Command Line
Xcode’s debugger includes an interactive version of the Swift language, known as the REPL (Read-Eval-Print-Loop). Use Swift syntax to evaluate and interact with your running app or write new code in a script-like environment. The REPL is available from within LLDB in Xcode’s console, or from Terminal.
</blockquote>
I want to know how to get the REPL?

How can I use swift in Terminal?

命令行工具

调试器

Python

Swift

Xcode

我读过。本文介绍了Xcode6的一些新特性，并表示：命令行Xcode的调试器包括Swift语言的交互式版本，称为REPL (Read-Eval-Print-Loop)。使用Swift语法评估正在运行的应用程序并与之交互，或者在类似脚本的环境中编写新代码。REPL可以从Xcode控制台中的LLDB中获得，或者从终端中获得。我想知道如何获得REPL？

问如何在终端中使用swift？
EN

回答 13

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何在终端中使用swift？EN

回答 13

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何在终端中使用swift？
EN