Fix ios simulator support (bevyengine#12339)

# Objective

- bevyengine#12103 broke iOS simulator support, it doesn't even compile anymore

## Solution

- Fix the feature

Cargo.toml

@@ -318,6 +318,9 @@ embedded_watcher = ["bevy_internal/embedded_watcher"]
 # Enable stepping-based debugging of Bevy systems
 bevy_debug_stepping = ["bevy_internal/bevy_debug_stepping"]
 
+# Enable support for the ios_simulator by downgrading some rendering capabilities
+ios_simulator = ["bevy_internal/ios_simulator"]
+
 [dependencies]
 bevy_dylib = { path = "crates/bevy_dylib", version = "0.14.0-dev", default-features = false, optional = true }
 bevy_internal = { path = "crates/bevy_internal", version = "0.14.0-dev", default-features = false }

crates/bevy_internal/Cargo.toml

@@ -163,6 +163,9 @@ bevy_debug_stepping = [
   "bevy_app/bevy_debug_stepping",
 ]
 
+# Enable support for the ios_simulator by downgrading some rendering capabilities
+ios_simulator = ["bevy_pbr?/ios_simulator", "bevy_render?/ios_simulator"]
+
 [dependencies]
 # bevy
 bevy_a11y = { path = "../bevy_a11y", version = "0.14.0-dev" }

docs/cargo_features.md

@@ -61,6 +61,7 @@ The default feature set enables most of the expected features of a game engine,
 |file_watcher|Enables watching the filesystem for Bevy Asset hot-reloading|
 |flac|FLAC audio format support|
 |glam_assert|Enable assertions to check the validity of parameters passed to glam|
+|ios_simulator|Enable support for the ios_simulator by downgrading some rendering capabilities|
 |jpeg|JPEG image format support|
 |minimp3|MP3 audio format support (through minimp3)|
 |mp3|MP3 audio format support|

examples/mobile/Cargo.toml

@@ -13,6 +13,9 @@ crate-type = ["staticlib", "cdylib"]
 [dependencies]
 bevy = { path = "../../" }
 
+[target.aarch64-apple-ios-sim.dependencies]
+bevy = { path = "../../", features = ["ios_simulator"] }
+
 [package.metadata.android]
 package = "org.bevyengine.example"
 apk_name = "bevyexample"