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=2247485835&idx=1&sn=b91614ebec3790ad2961d024743132bf&chksm=f95c920cce2b1b1a44356da483eaa12596a22e3405cb16896860cbc83c605f9034ed544f6844#rd
• I’m outlining a SwiftUI app to input, parse, and run Logo scripts with
standard commands like movement, turning, pen control, and loops. I plan
to model the turtle’s state and path segments, build a tokenizer and parser
supporting REPEAT and basic commands, and then render the results on a
scalable Canvas alongside a script editor and run button. I’ll create a plan
to break down analysis, interpreter implementation, and UI integration steps.
• Updated Plan
└ Building a Logo interpreter with SwiftUI UI involves several parts: parsing/
execution logic, turtle drawing data, and the SwiftUI interface that renders
results.
□ Design the Logo interpreter data structures and command set
□ Implement interpreter and turtle drawing engine
□ Build SwiftUI UI to run scripts and display drawings
• Updated Plan
└ Settled on a turtle state model with segments for drawing, and a tokenizer/
execution loop supporting basic Logo commands plus REPEAT blocks.
✔ Design the Logo interpreter data structures and command set
□ Implement interpreter and turtle drawing engine
□ Build SwiftUI UI to run scripts and display drawings
•Explored
└ Read LogoInterpreter.swift
• I’m checking that the Canvas prints correctly when results are nil and
confirming the logic around drawing the turtle with empty or non-empty
segments. I’m also verifying that interpretation runs synchronously and
marking step 3 as done, considering lightweight verification instead of full
test or build given the environment constraints.
• Updated Plan
└ Replaced the SwiftUI content view with a script editor, sample dropdown, and
canvas that renders interpreter output with a turtle marker.
✔ Design the Logo interpreter data structures and command set
✔ Implement interpreter and turtle drawing engine
✔ Build SwiftUI UI to run scripts and display drawings
•Ran git status -sb
•Ran git diff –stat
•Ran git diff
•Ran git diff – Logo/LogoInterpreter.swift
•Explored
└ Read LogoInterpreter.swift, ContentView.swift
• I’m shaping a concise final message that highlights the new Logo interpreter
and SwiftUI UI additions, with bullet points referencing exact file paths and
line numbers describing key features, command support, rendering, and error
handling. I’ll close with a note on tests not run and practical suggestions
for next steps like building and running the app in Xcode.
Added a Logo interpreter and SwiftUI UI so scripts execute and render in-app.
- Logo/LogoInterpreter.swift:3: Declares turtle drawing models plus localized
errors for user feedback.
- Logo/LogoInterpreter.swift:80: Implements the tokenizer and command
execution loop with movement, pen state, color, REPEAT, and bounds tracking to
produce drawable segments.
- Logo/ContentView.swift:3: Replaces the placeholder UI with a script editor,
sample menu, run/reset controls, and error messaging tied to interpreter
output.
- Logo/ContentView.swift:81: Uses a Canvas renderer to scale the turtle path
into the view and draw the turtle heading indicator even when no lines were
produced.
Tests were not run (not requested).
Next Steps
- Build and run the Logo scheme in Xcode to confirm rendering and adjust the
supported command set as needed.