Unhandled Exception(setState called after dispose)

the color loader was giving Unhandled exceptions when you use it until something loading
because it will keep listening to changes and timer ticks ,,
just added timer.cancel to stop listening and setstating

Author: Saifallak

lib/loaders/color_loader.dart

@@ -16,6 +16,7 @@ class _ColorLoaderState extends State<ColorLoader>
     with SingleTickerProviderStateMixin {
   final List<Color> colors;
   final Duration duration;
+  Timer timer;
 
   _ColorLoaderState(this.colors, this.duration);
 
@@ -59,7 +60,7 @@ class _ColorLoaderState extends State<ColorLoader>
 
     tweenIndex = 0;
 
-    Timer.periodic(duration, (Timer t) {
+    timer = Timer.periodic(duration, (Timer t) {
       setState(() {
         tweenIndex = (tweenIndex + 1) % colors.length;
       });
@@ -83,6 +84,7 @@ class _ColorLoaderState extends State<ColorLoader>
   @override
   void dispose() {
     super.dispose();
+    timer.cancel();
     controller.dispose();
   }
 }