如何在iOS SDK中使用Swift REPL

Question

我能否使用iOS SDK运行Swift REPL？

我想在REPL中导入并使用UIKit，但没有成功。

$ xcrun --sdk iphonesimulator8.1 --show-sdk-path
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator8.1.sdk

$ xcrun --sdk iphonesimulator8.1 swift
Welcome to Swift!  Type :help for assistance.
  1> import UIKit
/var/folders/kb/xgglxb597sv6h8b744d5vft00000gn/T/lldb/92014/repl1.swift:2:8: error: no such module 'UIKit'
import UIKit
       ^

$ swift -sdk `xcrun --sdk iphonesimulator8.1 --show-sdk-path`
Welcome to Swift!  Type :help for assistance.
  1> import UIKit
/var/folders/kb/xgglxb597sv6h8b744d5vft00000gn/T/lldb/91881/repl1.swift:2:8: error: no such module 'UIKit'
import UIKit
       ^

  1> import Cocoa
  2>  

我正在使用 Xcode 版本 6.1 (6A1052d)

- rintaro

Answer 1

您可以通过在已附加到 iOS 应用程序进程（您的 Xcode 项目）的 lldb 中运行 repl 来实现此目标。

1. Build project in Xcode, or:

   $ xcrun xcodebuild -configuration Debug -destination 'platform=iOS Simulator,name=iPhone 7,OS=10.3' clean build
   

2. Start standalone lldb for your iOS project:

   $ xcrun lldb -- $DerivedData/$AppName/Build/Products/Debug-iphonesimulator/$AppName.app
   (lldb) process attach --name '$AppName' --waitfor
   

   You may find useful platform select ios-simulator and platform connect $UDID commands here.

3. Run your iOS application in iOS simulator from Xcode

   • Or from command line:

     1. Boot simulator

        • From instruments:

          $ xcrun instruments -w "`xcrun instruments -s | grep 'iPhone 7 (10.3)' | head -1`"
          

        • Or as an application:

          $ open -a "Simulator" --args -CurrentDeviceUDID "`xcrun instruments -s | grep 'iPhone 7 (10.3)' | head -1 | sed -E -e 's/[^][]*\[([^][]*)\][^][]*/\1/g'`"
          

     2. Install the application on simulator, and launch it:

        $ xcrun simctl install booted $DerivedData/$AppName/Build/Products/Debug-iphonesimulator/$AppName.app
        $ xcrun simctl launch booted $AppBundleID
        

        Also, you can even use xcrun simctl launch --wait-for-debugger and start lldb later.

   • Or with ios-sim:

     1. Optionally boot simulator & install the application:

        $ ios-sim start --devicetypeid 'iPhone-7, 10.3'
        $ ios-sim install --devicetypeid 'iPhone-7, 10.3' $DerivedData/$AppName/Build/Products/Debug-iphonesimulator/$AppName.app
        

     2. Launch it:

        $ ios-sim launch --devicetypeid 'iPhone-7, 10.3' $DerivedData/$AppName/Build/Products/Debug-iphonesimulator/$AppName.app
        

4. Attach to process in iOS simulator in lldb:

   (lldb) continue
   (lldb) process interrupt
   

5. Run swift repl.

   (lldb) repl
    1> import UIKit
    2> 
   

此外，与 Xcode 调试终端仿真器中的 swift repl 不同，这里具有工作源代码自动完成和命令历史记录导航。

- Netsu

---

这是一个惊人的答案。 - WestCoastProjects

Answer 2

Swift REPL目前不支持iOS设备或iOS模拟器。

- Greg Parker

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这个改变了吗？ - Raphael