Why some Swift types only appear when you import two modules

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@Dylan19Yang is already working on this.

Since Sep 11, 2026.

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Description

https://sarunw.com/posts/swift-cross-import-overlay/

文章借 Map、PhotosPicker 与 WebView 解释 cross-import overlay:同时 import 两个框架才加载隐藏模块,并展示 SDK 中 swiftcrossimport/swiftoverlay 文件及排障方法;局限是聚焦 Apple SDK 的现成 overlay,未深入自建模块、构建系统兼容和不同工具链差异。

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