Add Local Build Instructions (#67)

* add build local instructions

* add Ninja to build steps

Author: FireMario211

misc/ios.md

@@ -18,6 +18,27 @@ else()
 endif()
 ```
 
+## Build
+
+To build mods for iOS, you must have Mac OS with the iPhone SDK installed from Xcode.
+
+You must also get the Geode binaries for iOS, you can do this using the CLI:
+```bash
+geode sdk update nightly
+geode sdk install-binaries --platform ios
+```
+
+Nightly is required, as iOS is currently not on the stable release for Geode.
+
+Now you can build your mod for iOS via:
+```bash
+geode build -p ios
+```
+Or if you want to build manually:
+```bash
+cmake -B build -DCMAKE_SYSTEM_NAME=iOS -DGEODE_TARGET_PLATFORM=iOS -DCMAKE_BUILD_TYPE=RelWithDebInfo -G Ninja
+cmake --build build
+```
 
 ## Github Actions
 To build your mod for iOS using `geode-sdk/build-geode-mod`, you have to add iOS to the build matrix, like so:
@@ -30,4 +51,4 @@ To build your mod for iOS using `geode-sdk/build-geode-mod`, you have to add iOS
 As of writing this, iOS support is only available on nightly Geode, so make sure to add this to the options of the `build-geode-mod` step
 ```yml
 sdk: nightly
-```
+```