orientation

ios/Classes/KeyboardPlugin.swift

@@ -86,7 +86,7 @@ public func ux_keyboard_anim_gen() -> Int32 {
 
 // MARK: - Plugin
 
-public class KeyboardPlugin: NSObject, FlutterPlugin {
+public class KeyboardPlugin: NSObject, NativePlugin {
     fileprivate static var shared: KeyboardPlugin?
 
     fileprivate var wakeCallback: WakeCallback?
@@ -112,15 +112,9 @@ public class KeyboardPlugin: NSObject, FlutterPlugin {
     fileprivate var animDuration: Double = 0
     fileprivate var animGeneration: Int32 = 0
 
-    public static func register(with registrar: FlutterPluginRegistrar) {
-        let instance = KeyboardPlugin()
-        KeyboardPlugin.shared = instance
-
-        instance.startObserving()
-    }
-
-    public func handle(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
-        result(FlutterMethodNotImplemented)
+    public func register(with registrar: FlutterPluginRegistrar) {
+        KeyboardPlugin.shared = self
+        startObserving()
     }
 
     /// Wake Dart so it reads the height on its next frame

ios/Classes/NativePlugin.swift

@@ -0,0 +1,5 @@
+import Flutter
+
+public protocol NativePlugin {
+    func register(with registrar: FlutterPluginRegistrar)
+}

ios/Classes/SensorPlugin.swift

@@ -0,0 +1,34 @@
+import CoreMotion
+import Flutter
+import UIKit
+
+@_cdecl("ux_device_orientation")
+public func ux_device_orientation() -> Int32 {
+    return SensorPlugin.shared?.currentIndex ?? 0
+}
+
+public class SensorPlugin: NSObject, NativePlugin {
+    fileprivate static var shared: SensorPlugin?
+    fileprivate var currentIndex: Int32 = 0
+
+    private let motion = CMMotionManager()
+
+    public func register(with registrar: FlutterPluginRegistrar) {
+        SensorPlugin.shared = self
+        guard motion.isDeviceMotionAvailable else { return }
+        motion.deviceMotionUpdateInterval = 1.0 / 10.0
+        motion.startDeviceMotionUpdates(to: .main) { [weak self] data, _ in
+            guard let self = self, let g = data?.gravity else { return }
+            if abs(g.z) > 0.8 { return }
+            let next: Int32
+            if abs(g.x) > abs(g.y) {
+                next = g.x < 0 ? 1 : 3
+            } else {
+                next = g.y < 0 ? 0 : 2
+            }
+            if next != self.currentIndex {
+                self.currentIndex = next
+            }
+        }
+    }
+}

ios/Classes/UxPlugin.swift

@@ -0,0 +1,20 @@
+import Flutter
+import UIKit
+
+public class UxPlugin: NSObject, FlutterPlugin {
+    private static var plugins: [NativePlugin] = []
+
+    public static func register(with registrar: FlutterPluginRegistrar) {
+        plugins = [
+            KeyboardPlugin(),
+            SensorPlugin(),
+        ]
+        for plugin in plugins {
+            plugin.register(with: registrar)
+        }
+    }
+
+    public func handle(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
+        result(FlutterMethodNotImplemented)
+    }
+}