Update README.md

smuyyh · web-flow · commit 50c6e6942a00 · 2017-01-18T15:26:43.000+08:00
diff --git a/README.md b/README.md
@@ -1,4 +1,6 @@
 # StickyHeaderListView
 仿滴滴打车开具发票页，ListView粘性Header
 
-![https://github.com/smuyyh/StickyHeaderListView/blob/master/screenshot/screenshot.gif?raw=true](https://github.com/smuyyh/StickyHeaderListView/blob/master/screenshot/screenshot.gif?raw=true)
+## 预览
+
+<img src="https://github.com/smuyyh/StickyHeaderListView/blob/master/screenshot/screenshot.gif?raw=true" width=300 />
