来源：AI开发日志公众号专辑「Build Your Own X With AI」
原文链接：https://mp.weixin.qq.com/s?__biz=MzUxMjg3MjE2OA==&mid=2247485853&idx=1&sn=a0acd6c958972b6936d185473a26c12f&chksm=f95c921ace2b1b0ce648b5eefd8254d64c0d673e5aa4ac8982996e2953caa9f4bde2a19acf66#rd
，时长
01:23
Logo Runner
Logo Runner 是一个基于 SwiftUI 的 iOS Logo 语言实验场。
Logo Runner is a SwiftUI playground for experimenting with the Logo programming language on iOS.
Screenshots
Highlights
实时 Logo 解释器
—— 支持多海龟、带参数过程、变量、算术助手、条件语句（支持含可选 else 块的 IF、IFELSE）以及分形友好的递归深度保护。
丰富示例库
—— 精选 100 份脚本，涵盖分形、多海龟协作、色彩爆发、函数式组合等主题，并按类别以横向卡片呈现。
脚本工作台
—— 等宽编辑器配合关键字工具栏，自动保存最近脚本，提供保存、重命名、刷新与载入对话框。
播放控制
—— 支持 0.25×–3× 的动画速度调节，可切换到逐步播放模式按片段查看绘制过程。
交互画布
—— 可捏合缩放、拖拽平移、双击或点击重置居中，海龟标记以俯视视角绘制并随方向旋转。
Live Logo Interpreter
– Supports multiple turtles, parameterised procedures, variables, arithmetic helpers, conditionals (IF, IFELSE with optional else blocks) and fractal-friendly recursion safeguards.
Rich Sample Library
– 100 curated examples spanning fractals, multi-turtle choreography, colour bursts, and functional compositions. Samples are organised by category with a horizontal carousel.
Script Workspace
– Monospaced editor with keyword toolbar, persistent autosave, and dialogs to save, rename, refresh, and reload your own scripts.
Playback Controls
– Choose automatic animation (speed slider from 0.25×–3×) or manual step-by-step playback with segment scrubbing.
Interactive Canvas
– Pinch to zoom, drag to pan, double-tap or press reset to recenter. The turtle marker draws in a top-down view aligned with its heading.
Building
xcodebuild -scheme Logo -destination ’platform=iOS Simulator,name=iPhone 15’ build
If the simulator destination is unavailable, open Logo.xcodeproj in Xcode and run on an available device or simulator.
xcodebuild -scheme Logo -destination ’platform=iOS Simulator,name=iPhone 15’ build
如果指定模拟器不可用，请直接在 Xcode 中打开 Logo.xcodeproj 并选择可用的设备或模拟器运行。
Running Tests
xcodebuild test -scheme Logo -destination ’platform=iOS Simulator,name=iPhone 15’
xcodebuild test -scheme Logo -destination ’platform=iOS Simulator,name=iPhone 15’
Getting Started
Launch the app; a default square script renders immediately.
Use Samples to explore curated programs or Scripts to save/load custom work.
Toggle 自动/逐步 playback to switch between automatic animation and manual stepping.
Adjust the slider to change playback speed or zoom controls to inspect intricate fractals.
启动应用即可看到默认正方形脚本。
使用 Samples 浏览精选程序，或通过 Scripts 保存/载入自定义脚本。
切换 自动 / 逐步 控件以选择动画或逐段播放模式。
利用速度滑杆与缩放控件调整节奏，便于观察复杂分形细节。
Directory Layout
Logo/
– SwiftUI app sources (ContentView, LogoInterpreter, supporting utilities).
LogoTests/
– Unit specs using Swift Testing (add new tests here).
LogoUITests/
– UI automation harnesses.
Logo.xcodeproj/
– Xcode project configuration.
Logo/
—— SwiftUI 应用源文件（ContentView、LogoInterpreter 等）。
LogoTests/
—— 使用 Swift Testing 的单元测试。
LogoUITests/
—— UI 自动化测试套件。
Logo.xcodeproj/
—— Xcode 工程配置。
Logo Dialect Notes
Commands are case-insensitive (FD, FORWARD, COLOR, MAKE, etc.).
Variables use the traditional MAKE “NAME value and :NAME dereference conventions.
IF condition [true] [false]
accepts an optional else block; IFELSE remains for explicit two-branch logic.
Built-in math helpers: SUM,DIFFERENCE,PRODUCT,QUOTIENT,REMAINDER,POWER,ABS,NEG,MIN,MAX,LESS,GREATER,EQUAL,NOTEQUAL,RANDOM,PI,E.
指令不区分大小写（FD、FORWARD、COLOR、MAKE 等）。
变量遵循传统的 MAKE “NAME value 与 :NAME 取值语法。
IF 条件 [成立操作] [不成立操作]
的第二个方括号可选；IFELSE 依旧提供明确的双分支。
内置数学助手：SUM、DIFFERENCE、PRODUCT、QUOTIENT、REMAINDER、POWER、ABS、NEG、MIN、MAX、LESS、GREATER、EQUAL、NOTEQUAL、RANDOM、PI、E。
Contributing
Fork & clone the repository.
Create a feature branch.
Update tests and docs where relevant.
Open a pull request following the project’s commit and PR guidelines in AGENTS.md.
Fork 并克隆仓库。
创建功能分支开展开发。
按需补充或更新测试与文档。
参照 AGENTS.md 中的提交与 PR 规范发起合并请求。