use in example

examples/mobile/src/lib.rs

@@ -2,7 +2,7 @@
 
 use bevy::{
     color::palettes::basic::*,
-    input::touch::TouchPhase,
+    input::{gestures::RotationGesture, touch::TouchPhase},
     prelude::*,
     window::{AppLifecycle, WindowMode},
 };
@@ -15,6 +15,9 @@ fn main() {
         primary_window: Some(Window {
             resizable: false,
             mode: WindowMode::BorderlessFullscreen,
+            // on iOS, gestures must be enabled.
+            // This doesn't work on Android
+            recognize_rotation_gesture: true,
             ..default()
         }),
         ..default()
@@ -35,6 +38,7 @@ fn touch_camera(
     mut touches: EventReader<TouchInput>,
     mut camera: Query<&mut Transform, With<Camera3d>>,
     mut last_position: Local<Option<Vec2>>,
+    mut rotations: EventReader<RotationGesture>,
 ) {
     let window = windows.single();
 
@@ -55,6 +59,12 @@ fn touch_camera(
         }
         *last_position = Some(touch.position);
     }
+    /// Rotation gestures only work on iOS
+    for rotation in rotations.read() {
+        let mut transform = camera.single_mut();
+        let forward = transform.forward();
+        transform.rotate_axis(forward, rotation.0 / 10.0)
+    }
 }
 
 /// set up a simple 3D scene