一个简单的 iOS/macOS/tvOS 全文搜索 (FTS) 类，使用 SQLite FTS5，提供类似于 SKSearchKit 的 API，且 **不依赖任何外部库**
我想为我的 macOS/iOS 应用程序添加全文搜索索引，但发现 SKSearchKit (以及 DFSearchKit) 仅适用于 macOS。
SQLite 通过 FTS 提供了强大的全文搜索功能，我想以类似于 SKSearchKit 的方式使用它。 我也想要一个简单的包装器，**不包含任何依赖项**。 尽管我很喜欢 GRDB，但我并不需要它提供的所有功能。
我还想要一个可以：-
- 在没有传统数据库的应用程序中独立工作，以及
- 在具有现有 SQLite 数据库的应用程序中工作。
- 能够在 iOS、macOS、macOS (Catalyst) 和 tvOS 上的应用程序之间共享。
// Create an index
let index = DSFFullTextSearchIndex()
index.create(filePath: /* some file path */)
//
// Add some documents
//
let url1 = URL(string: "demo://maintext/1")
index.add(url: url1, text: "Sphinx of black quartz judge my vow")
let url2 = URL(string: "demo://maintext/2")
index.add(url: url2, text: "Quick brown fox jumps over the lazy dog")
let url3 = URL(string: "demo://maintext/3")
index.add(url: url3, text: "The dog didn't like the bird sitting on the fence and left quietly")
//
// Search
//
let urls1 = index.search(text: "quartz") // single match - url1
let urls2 = index.search(text: "quick") // single match - url2
let urls3 = index.search(text: "dog") // two matches - url1 and url3
// Search with a wildcard
let urls4 = index.search(text: "qu*") // three matches = url1 (quartz), url2 (quick) and url3 (quietly)
使用 swift-doc 生成。
- 添加自定义分词器，以更准确地处理停用词和 CJK（中文、日文、韩文）
- 字符折叠等。
- 还有很多其他内容。
MIT License
Copyright (c) 2020 Darren Ford
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