Merge pull request #2628 from Jsnows/2.0

增加逻辑：

examples/routers/affix.vue

@@ -10,12 +10,24 @@
     }
 </style>
 <template>
+<div>
     <Affix>
-        <span class="demo-affix">固定在最顶部</span>
+        <div class="demo-affix">固定在最顶部</div>
     </Affix>
+    <div v-for="(item,index) in arr">{{item}}</div>
+</div>
 </template>
 <script>
     export default {
-
+        data(){
+            return {
+                arr: []
+            }
+        },
+        created(){
+            for(let i = 0 ; i < 100 ; i++){
+                this.arr.push(i);
+            }
+        }
     }
 </script>