diff --git a/doric-demo/src/SliderStyleDemo.ts b/doric-demo/src/SliderStyleDemo.ts
index b600be8a..8c25824a 100644
--- a/doric-demo/src/SliderStyleDemo.ts
+++ b/doric-demo/src/SliderStyleDemo.ts
@@ -34,8 +34,8 @@ class SliderStyleDemo extends Panel {
             }
         }))
 
-        setTimeout(() => {
-            pager.slidePage(this.context, 2, false);
-        }, 200)
+        // setTimeout(() => {
+        //     pager.slidePage(this.context, 2, false);
+        // }, 200)
     }
 }
\ No newline at end of file
diff --git a/doric-iOS/Pod/Classes/Shader/DoricSliderNode.m b/doric-iOS/Pod/Classes/Shader/DoricSliderNode.m
index 83eb4e9c..abb5830e 100644
--- a/doric-iOS/Pod/Classes/Shader/DoricSliderNode.m
+++ b/doric-iOS/Pod/Classes/Shader/DoricSliderNode.m
@@ -441,7 +441,7 @@ - (void)scrollViewDidScroll:(UIScrollView *)scrollView {
 - (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView {
     NSUInteger pageIndex;
     if ([self.slideStyle isEqualToString:@"gallery"]) {
-        pageIndex = (NSUInteger) (scrollView.contentOffset.x / self.galleryItemWidth);
+        pageIndex = (NSUInteger) (scrollView.contentOffset.x / self.galleryItemWidth + 0.5f);
         scrollView.contentOffset = CGPointMake(pageIndex * self.galleryItemWidth, scrollView.contentOffset.y);
     } else {
         pageIndex = (NSUInteger) (scrollView.contentOffset.x / scrollView.width);