Update README.md

README.md

@@ -1,6 +1,6 @@
 # cordova-plugin-auto-theme
 
-**Android only**
+**Android only** (See below for how to accomplish the same on iOS without any plugins)
 
 A Cordova plugin for detecting if dark mode is enabled on Android, and listening for changes to device theme. Only works on Android 9+, so make sure to check the Android version in your code.
 
@@ -22,3 +22,19 @@ window.onThemeChange = function(isdark) {
     console.log("Dark mode changed. Is dark mode: "+isdark)
 }
 ```
+
+## How to detect dark mode on iOS
+
+You don't need any plugins to check the current device theme and respond to changes to theme on iOS devices.
+
+```js
+//get current device theme (ios)
+var isdark = window.matchMedia('(prefers-color-scheme:dark)').matches;
+```
+
+```js
+//called whenever theme changes (ios)
+window.matchMedia('(prefers-color-scheme:dark)').addListener(function() {
+     var isdark = window.matchMedia('(prefers-color-scheme:dark)').matches;
+});
+```