Update README.md

ClassEve · web-flow · commit 77aa22b42843 · 2017-03-07T15:24:41.000+08:00
diff --git a/README.md b/README.md
@@ -57,6 +57,10 @@ yfBox.tip("warning","这里是提示内容",3000)
 
 # 三、loading加载框
 ### 1.调出加载框
+```
 yfBox.load();
+```
 ### 2.关闭加载框
+```
 yfBox.closeLoad();
+```
