调整下拉动画

Author: CarGuo

lib/widget/pull/gsy_flare_pull_controller.dart

@@ -6,7 +6,6 @@ mixin GSYFlarePullController implements FlareController {
   ActorAnimation _pullAnimation;
 
   double pulledExtentFlare = 0;
-  double _refreshTriggerPullDistance = 140;
   double _speed = 2.0;
   double _rockTime = 0.0;
 
@@ -25,12 +24,17 @@ mixin GSYFlarePullController implements FlareController {
       _pullAnimation.apply(_rockTime % _pullAnimation.duration, artboard, 1.0);
       return true;
     }
-    double animationPosition = pulledExtentFlare / _refreshTriggerPullDistance;
+    var pullExtent = (pulledExtentFlare > refreshTriggerPullDistance)
+        ? pulledExtentFlare - refreshTriggerPullDistance
+        : pulledExtentFlare;
+    double animationPosition = pullExtent / refreshTriggerPullDistance;
     animationPosition *= animationPosition;
     _rockTime = _pullAnimation.duration * animationPosition;
     _pullAnimation.apply(_rockTime, artboard, 1.0);
     return true;
   }
 
   bool get getPlayAuto;
+
+  double get refreshTriggerPullDistance => 140;
 }

lib/widget/pull/gsy_pull_new_load_widget.dart

@@ -300,6 +300,9 @@ class _GSYPullLoadWidgetState extends State<GSYPullLoadWidget>
   @override
   bool get getPlayAuto => playAuto;
 
+  @override
+  double  get refreshTriggerPullDistance => iosRefreshHeight;
+
   Widget buildSimpleRefreshIndicator(
     BuildContext context,
     IOS.RefreshIndicatorMode refreshState,