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Update CONTRIBUTING.md to add iOS engine development instructions. (#2844)

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Chinmay Garde 2016-07-29 16:22:35 -07:00 committed by GitHub
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CONTRIBUTING.md
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@ -112,9 +112,21 @@ If you're going to be debugging crashes in the engine, make sure you add
`android/AndroidManifest.xml` file for the Flutter app you are using
to test the engine.
### iOS
### iOS (cross-compiling from Mac)
* Make sure you have Xcode 7.3.0+ installed.
* `gclient sync` to update dependencies.
* `./sky/tools/gn --ios --unoptimized` to prepare build files.
* For a discussion on the various flags and modes, [read this discussion](https://github.com/flutter/flutter/wiki/Flutter's-modes).
* `ninja -C out/ios_debug_unopt` to build iOS artifacts.
Once the artifacts are built, you can start using them in your application by following these steps:
* `cd /path/to/flutter/examples/hello_world`
* `pub get`
* `../../bin/flutter run --local-engine-src-path /path/to/engine/src --local-engine=ios_debug_unopt`
* Depending on the configuration you built, modify the `local-engine` flag.
* If you are debugging crashes in the engine, you can connect the `LLDB` debugger from `Xcode` by opening `ios/Runner.xcodeproj` and starting the application by clicking the Run button (CMD + R).
See [this wiki page](https://github.com/flutter/engine/wiki/Flutter-Apps-on-iOS).
### Desktop (Mac and Linux), for tests