rust-to-ios

Example project for building a library for iOS.

• ✓ sending primitives between Rust and iOS
• ✓ sending strings between Rust and iOS
• ✓ giving ownership of a Rust instance to Swift

Setup

1. Download rustup needed to setup Rust for cross-compiling.

   curl https://sh.rustup.rs -sSf | sh

2. Download targets for iOS.

   rustup target add aarch64-apple-ios armv7-apple-ios armv7s-apple-ios x86_64-apple-ios i386-apple-ios

3. Install cargo-lipo to generate the iOS universal library.

   cargo install cargo-lipo

Building the library

1. Create a new cargo project.

   cargo new message

2. Update Cargo.toml by adding the [lib] section.

   [lib]
   name = "message"
   crate-type = ["staticlib"]

3. Write the library and expose its public interface in a C header.

4. Build the library.

   cd message
   
   cargo lipo --release

Using the library

1. Create the iOS project.

2. Add the C header to allow using the Rust functions from C.

3. Copy target/universal/release/libmessage.a to project.

4. Add libresolv.tbd to Linked frameworks and libraries.

5. Note that cargo-lipo does not support bitcode yet. You must set ENABLE_BITCODE to NO.

Author

Wojtek Lukaszuk @wojteklu

License

Available under the MIT license. See the LICENSE file for more info.