1.修改iOS UIScrollView EmptyView，增加背景色设置以及Title自定义。

common/EmptyView/RAEmptyView.m

@@ -33,8 +33,8 @@
     emptyView.tipLabel.text = title;
     
     [emptyView.tipLabel sizeToFit];
-    CGSize size = emptyView.bounds.size;
-    emptyView.frame = CGRectMake(0, 0, size.width + 10, size.height + 10);
+    CGSize size = emptyView.tipLabel.bounds.size;
+    emptyView.frame = CGRectMake(0, 0, size.width + 20, size.height + 20);
     
     return emptyView;
 }