UniFFI generates safe, idiomatic bindings for your Rust code to be called from mobile languages like Swift and Kotlin. Add the `uniffi` crate to your `Cargo.toml`, define your API in a `.udl` file, and run the build script to generate the bindings.

How to Use UniFFI for Cross-Platform Mobile Bindings

UniFFI generates safe, idiomatic bindings for your Rust code to be called from mobile languages like Swift and Kotlin. Add the uniffi crate to your Cargo.toml, define your API in a .udl file, and run the build script to generate the bindings.

[dependencies]
uniffi = "0.28"

[build-dependencies]
uniffi = { version = "0.28", features = ["build"] }

// build.rs
fn main() {
    uniffi::generate_scaffolding("src/my_api.udl").unwrap();
}

// src/lib.rs
uniffi::include_scaffolding!("my_api");

# Generate bindings for iOS and Android
cargo run --bin uniffi-bindgen generate --config src/my_api.udl --language swift
cargo run --bin uniffi-bindgen generate --config src/my_api.udl --language kotlin

UniFFI is a tool that automatically creates the 'glue' code needed to let your mobile app talk to your Rust library. Instead of writing complex, error-prone code to connect Swift or Kotlin to Rust, UniFFI reads your Rust definitions and generates the necessary files for you. Think of it as a translator that ensures your Rust logic can be safely used inside an iPhone or Android app without manual setup.