Enhance beginRefreshing view effect

Enhance beginRefreshing view effect

MJRefresh.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = "MJRefresh"
-  s.version      = "2.0.1"
+  s.version      = "2.0.2"
   s.summary      = "The easiest way to use pull-to-refresh"
   s.homepage     = "https://github.com/CoderMJLee/MJRefresh"
   s.license      = "MIT"

MJRefresh/Base/MJRefreshComponent.m

@@ -133,7 +133,9 @@ - (void)setRefreshingTarget:(id)target refreshingAction:(SEL)action
 #pragma mark 进入刷新状态
 - (void)beginRefreshing
 {
-    self.alpha = 1.0;
+    [UIView animateWithDuration:MJRefreshFastAnimationDuration animations:^{
+        self.alpha = 1.0;
+    }];
     self.pullingPercent = 1.0;
     // 只要正在刷新，就完全显示
     if (self.window) {